s3 metrics adjust the label

fix https://github.com/chrislusf/seaweedfs/issues/1501

.github/ISSUE_TEMPLATE/bug_report.md

@@ -8,6 +8,7 @@ assignees: ''
 ---
 
 Sponsors SeaweedFS via Patreon https://www.patreon.com/seaweedfs
+Report issues here. Ask questions here https://stackoverflow.com/questions/tagged/seaweedfs
 
 example of a good issue report:
 https://github.com/chrislusf/seaweedfs/issues/1005

.github/workflows/go.yml

@@ -0,0 +1,37 @@
+name: Go
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+
+    - name: Set up Go 1.x
+      uses: actions/setup-go@v2
+      with:
+        go-version: ^1.13
+      id: go
+
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v2
+
+    - name: Get dependencies
+      run: |
+        cd weed; go get -v -t -d ./...
+        if [ -f Gopkg.toml ]; then
+            curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
+            dep ensure
+        fi
+
+    - name: Build
+      run: cd weed; go build -v .
+
+    - name: Test
+      run: cd weed; go test -v .

.travis.yml

@@ -1,9 +1,8 @@
 sudo: false
 language: go
 go:
-  - 1.11.x
-  - 1.12.x
-  - 1.13.x
+  - 1.14.x
+  - 1.15.x
 
 before_install:
   - export PATH=/home/travis/gopath/bin:$PATH
@@ -45,4 +44,4 @@ deploy:
   on:
     tags: true
     repo: chrislusf/seaweedfs
-    go: 1.13.x
+    go: 1.15.x

Makefile

@@ -8,11 +8,14 @@ appname := weed
 
 sources := $(wildcard *.go)
 
-build = CGO_ENABLED=0 GOOS=$(1) GOARCH=$(2) go build -ldflags "-extldflags -static" -o build/$(appname)$(3) $(SOURCE_DIR)
+COMMIT ?= $(shell git rev-parse --short HEAD)
+LDFLAGS ?= -X github.com/chrislusf/seaweedfs/weed/util.COMMIT=${COMMIT}
+
+build = CGO_ENABLED=0 GOOS=$(1) GOARCH=$(2) go build -ldflags "-extldflags -static $(LDFLAGS)" -o build/$(appname)$(3) $(SOURCE_DIR)
 tar = cd build && tar -cvzf $(1)_$(2).tar.gz $(appname)$(3) && rm $(appname)$(3)
 zip = cd build && zip $(1)_$(2).zip $(appname)$(3) && rm $(appname)$(3)
 
-build_large = CGO_ENABLED=0 GOOS=$(1) GOARCH=$(2) go build -tags 5BytesOffset -ldflags "-extldflags -static" -o build/$(appname)$(3) $(SOURCE_DIR)
+build_large = CGO_ENABLED=0 GOOS=$(1) GOARCH=$(2) go build -tags 5BytesOffset -ldflags "-extldflags -static $(LDFLAGS)" -o build/$(appname)$(3) $(SOURCE_DIR)
 tar_large = cd build && tar -cvzf $(1)_$(2)_large_disk.tar.gz $(appname)$(3) && rm $(appname)$(3)
 zip_large = cd build && zip $(1)_$(2)_large_disk.zip $(appname)$(3) && rm $(appname)$(3)
 
@@ -31,13 +34,13 @@ deps:
 	rm -rf /home/travis/gopath/src/go.etcd.io/etcd/vendor/golang.org/x/net/trace
 
 build: deps
-	go build $(GO_FLAGS) -o $(BINARY) $(SOURCE_DIR)
+	go build $(GO_FLAGS) -ldflags "$(LDFLAGS)" -o $(BINARY) $(SOURCE_DIR)
 
 linux: deps
 	mkdir -p linux
-	GOOS=linux GOARCH=amd64 go build $(GO_FLAGS) -o linux/$(BINARY) $(SOURCE_DIR)
+	GOOS=linux GOARCH=amd64 go build $(GO_FLAGS) -ldflags "$(LDFLAGS)" -o linux/$(BINARY) $(SOURCE_DIR)
 
-release: deps windows_build darwin_build linux_build bsd_build 5_byte_linux_build 5_byte_darwin_build 5_byte_windows_build
+release: deps windows_build darwin_build linux_build bsd_build 5_byte_linux_build 5_byte_arm64_build 5_byte_darwin_build 5_byte_windows_build
 
 ##### LINUX BUILDS #####
 5_byte_linux_build:
@@ -52,6 +55,14 @@ release: deps windows_build darwin_build linux_build bsd_build 5_byte_linux_buil
 	$(call build_large,windows,amd64,.exe)
 	$(call zip_large,windows,amd64,.exe)
 
+5_byte_arm_build: $(sources)
+	$(call build_large,linux,arm,)
+	$(call tar_large,linux,arm)
+
+5_byte_arm64_build: $(sources)
+	$(call build_large,linux,arm64,)
+	$(call tar_large,linux,arm64)
+
 linux_build: build/linux_arm.tar.gz build/linux_arm64.tar.gz build/linux_386.tar.gz build/linux_amd64.tar.gz
 
 build/linux_386.tar.gz: $(sources)

README.md

@@ -4,7 +4,7 @@
 [![Build Status](https://travis-ci.org/chrislusf/seaweedfs.svg?branch=master)](https://travis-ci.org/chrislusf/seaweedfs)
 [![GoDoc](https://godoc.org/github.com/chrislusf/seaweedfs/weed?status.svg)](https://godoc.org/github.com/chrislusf/seaweedfs/weed)
 [![Wiki](https://img.shields.io/badge/docs-wiki-blue.svg)](https://github.com/chrislusf/seaweedfs/wiki)
-[![Docker Pulls](https://img.shields.io/docker/pulls/chrislusf/seaweedfs.svg?maxAge=604800)](https://hub.docker.com/r/chrislusf/seaweedfs/)
+[![Docker Pulls](https://img.shields.io/docker/pulls/chrislusf/seaweedfs.svg?maxAge=4800)](https://hub.docker.com/r/chrislusf/seaweedfs/)
 
 ![SeaweedFS Logo](https://raw.githubusercontent.com/chrislusf/seaweedfs/master/note/seaweedfs.png)
 
@@ -50,6 +50,7 @@ Your support will be really appreciated by me and other supporters!
 
 - [Download Binaries for different platforms](https://github.com/chrislusf/seaweedfs/releases/latest)
 - [SeaweedFS on Slack](https://join.slack.com/t/seaweedfs/shared_invite/enQtMzI4MTMwMjU2MzA3LTEyYzZmZWYzOGQ3MDJlZWMzYmI0OTE4OTJiZjJjODBmMzUxNmYwODg0YjY3MTNlMjBmZDQ1NzQ5NDJhZWI2ZmY)
+- [SeaweedFS on Twitter](https://twitter.com/SeaweedFS)
 - [SeaweedFS Mailing List](https://groups.google.com/d/forum/seaweedfs)
 - [Wiki Documentation](https://github.com/chrislusf/seaweedfs/wiki)
 - [SeaweedFS Introduction Slides](https://www.slideshare.net/chrislusf/seaweedfs-introduction)
@@ -89,7 +90,7 @@ There is only 40 bytes of disk storage overhead for each file's metadata. It is
 
 SeaweedFS started by implementing [Facebook's Haystack design paper](http://www.usenix.org/event/osdi10/tech/full_papers/Beaver.pdf). Also, SeaweedFS implements erasure coding with ideas from [f4: Facebook’s Warm BLOB Storage System](https://www.usenix.org/system/files/conference/osdi14/osdi14-paper-muralidhar.pdf)
 
-On top of the object store, optional [Filer] can support directories and POSIX attributes. Filer is a separate linearly-scalable stateless server with customizable metadata stores, e.g., MySql, Postgres, Redis, Etcd, Cassandra, LevelDB, MemSql, TiDB, TiKV, CockroachDB, etc.
+On top of the object store, optional [Filer] can support directories and POSIX attributes. Filer is a separate linearly-scalable stateless server with customizable metadata stores, e.g., MySql, Postgres, Mongodb, Redis, Cassandra, Elastic Search, LevelDB, MemSql, TiDB, Etcd, CockroachDB, etc.
 
 [Back to TOC](#table-of-contents)
 
@@ -98,9 +99,10 @@ On top of the object store, optional [Filer] can support directories and POSIX a
 * Automatic master servers failover - no single point of failure (SPOF).
 * Automatic Gzip compression depending on file mime type.
 * Automatic compaction to reclaim disk space after deletion or update.
-* Servers in the same cluster can have different disk spaces, file systems, OS etc.
+* [Automatic entry TTL expiration][VolumeServerTTL].
+* Any server with some disk spaces can add to the total storage space.
 * Adding/Removing servers does **not** cause any data re-balancing.
-* Optionally fix the orientation for jpeg pictures.
+* Optional picture resizing.
 * Support ETag, Accept-Range, Last-Modified, etc.
 * Support in-memory/leveldb/readonly mode tuning for memory/performance balance.
 * Support rebalancing the writable and readonly volumes.
@@ -110,21 +112,32 @@ On top of the object store, optional [Filer] can support directories and POSIX a
 [Back to TOC](#table-of-contents)
 
 ## Filer Features ##
-* [filer server][Filer] provide "normal" directories and files via http.
-* [mount filer][Mount] to read and write files directly as a local directory via FUSE.
-* [Amazon S3 compatible API][AmazonS3API] to access files with S3 tooling.
-* [Hadoop Compatible File System][Hadoop] to access files from Hadoop/Spark/Flink/etc jobs.
-* [Async Backup To Cloud][BackupToCloud] has extremely fast local access and backups to Amazon S3, Google Cloud Storage, Azure, BackBlaze.
-* [WebDAV] access as a mapped drive on Mac and Windows, or from mobile devices.
+* [Filer server][Filer] provides "normal" directories and files via http.
+* [Super Large Files][SuperLargeFiles] stores large or super large files in tens of TB.
+* [Mount filer][Mount] reads and writes files directly as a local directory via FUSE.
+* [Active-Active Replication][ActiveActiveAsyncReplication] enables asynchronous one-way or two-way cross cluster continuous replication.
+* [Amazon S3 compatible API][AmazonS3API] accesses files with S3 tooling.
+* [Hadoop Compatible File System][Hadoop] accesses files from Hadoop/Spark/Flink/etc or even runs HBase.
+* [Async Replication To Cloud][BackupToCloud] has extremely fast local access and backups to Amazon S3, Google Cloud Storage, Azure, BackBlaze.
+* [WebDAV] accesses as a mapped drive on Mac and Windows, or from mobile devices.
+* [AES256-GCM Encrypted Storage][FilerDataEncryption] safely stores the encrypted data.
+* [File TTL][FilerTTL] automatically purges file metadata and actual file data.
+* [Kubernetes CSI Driver][SeaweedFsCsiDriver] A Container Storage Interface (CSI) Driver. [![Docker Pulls](https://img.shields.io/docker/pulls/chrislusf/seaweedfs-csi-driver.svg?maxAge=4800)](https://hub.docker.com/r/chrislusf/seaweedfs-csi-driver/)
 
 [Filer]: https://github.com/chrislusf/seaweedfs/wiki/Directories-and-Files
-[Mount]: https://github.com/chrislusf/seaweedfs/wiki/Mount
+[SuperLargeFiles]: https://github.com/chrislusf/seaweedfs/wiki/Data-Structure-for-Large-Files
+[Mount]: https://github.com/chrislusf/seaweedfs/wiki/FUSE-Mount
 [AmazonS3API]: https://github.com/chrislusf/seaweedfs/wiki/Amazon-S3-API
-[BackupToCloud]: https://github.com/chrislusf/seaweedfs/wiki/Backup-to-Cloud
+[BackupToCloud]: https://github.com/chrislusf/seaweedfs/wiki/Async-Replication-to-Cloud
 [Hadoop]: https://github.com/chrislusf/seaweedfs/wiki/Hadoop-Compatible-File-System
 [WebDAV]: https://github.com/chrislusf/seaweedfs/wiki/WebDAV
 [ErasureCoding]: https://github.com/chrislusf/seaweedfs/wiki/Erasure-coding-for-warm-storage
 [CloudTier]: https://github.com/chrislusf/seaweedfs/wiki/Cloud-Tier
+[FilerDataEncryption]: https://github.com/chrislusf/seaweedfs/wiki/Filer-Data-Encryption
+[FilerTTL]: https://github.com/chrislusf/seaweedfs/wiki/Filer-Stores
+[VolumeServerTTL]: https://github.com/chrislusf/seaweedfs/wiki/Store-file-with-a-Time-To-Live
+[SeaweedFsCsiDriver]: https://github.com/seaweedfs/seaweedfs-csi-driver
+[ActiveActiveAsyncReplication]: https://github.com/chrislusf/seaweedfs/wiki/Filer-Active-Active-cross-cluster-continuous-synchronization
 
 [Back to TOC](#table-of-contents)
 
@@ -354,15 +367,16 @@ The architectures are mostly the same. SeaweedFS aims to store and read files fa
 
 * SeaweedFS optimizes for small files, ensuring O(1) disk seek operation, and can also handle large files.
 * SeaweedFS statically assigns a volume id for a file. Locating file content becomes just a lookup of the volume id, which can be easily cached.
-* SeaweedFS Filer metadata store can be any well-known and proven data stores, e.g., Cassandra, Redis, Etcd, MySql, Postgres, MemSql, TiDB, CockroachDB, etc, and is easy to customized.
+* SeaweedFS Filer metadata store can be any well-known and proven data stores, e.g., Cassandra, Mongodb, Redis, Elastic Search, MySql, Postgres, MemSql, TiDB, CockroachDB, Etcd etc, and is easy to customized.
 * SeaweedFS Volume server also communicates directly with clients via HTTP, supporting range queries, direct uploads, etc.
 
-| System         | File Meta                       | File Content Read| POSIX  | REST API | Optimized for small files |
+| System         | File Meta                       | File Content Read| POSIX  | REST API | Optimized for large number of small files |
 | -------------  | ------------------------------- | ---------------- | ------ | -------- | ------------------------- |
 | SeaweedFS      | lookup volume id, cacheable     | O(1) disk seek   |        | Yes      | Yes                       |
 | SeaweedFS Filer| Linearly Scalable, Customizable | O(1) disk seek   | FUSE   | Yes      | Yes                       |
 | GlusterFS      | hashing          |                  | FUSE, NFS          |          |                           |
 | Ceph           | hashing + rules  |                  | FUSE               | Yes      |                           |
+| MooseFS        | in memory        |                  | FUSE               |       | No                          |
 
 [Back to TOC](#table-of-contents)
 
@@ -374,6 +388,14 @@ GlusterFS hashes the path and filename into ids, and assigned to virtual volumes
 
 [Back to TOC](#table-of-contents)
 
+### Compared to MooseFS ###
+
+MooseFS chooses to neglect small file issue. From moosefs 3.0 manual, "even a small file will occupy 64KiB plus additionally 4KiB of checksums and 1KiB for the header", because it "was initially designed for keeping large amounts (like several thousands) of very big files"
+
+MooseFS Master Server keeps all meta data in memory. Same issue as HDFS namenode. 
+
+[Back to TOC](#table-of-contents)
+
 ### Compared to Ceph ###
 
 Ceph can be setup similar to SeaweedFS as a key->blob store. It is much more complicated, with the need to support layers on top of it. [Here is a more detailed comparison](https://github.com/chrislusf/seaweedfs/issues/120)
@@ -386,7 +408,7 @@ Ceph uses CRUSH hashing to automatically manage the data placement. SeaweedFS pl
 
 SeaweedFS is optimized for small files. Small files are stored as one continuous block of content, with at most 8 unused bytes between files. Small file access is O(1) disk read.
 
-SeaweedFS Filer uses off-the-shelf stores, such as MySql, Postgres, Redis, Etcd, Cassandra, MemSql, TiDB, CockroachCB, to manage file directories. There are proven, scalable, and easier to manage.
+SeaweedFS Filer uses off-the-shelf stores, such as MySql, Postgres, Mongodb, Redis, Elastic Search, Cassandra, MemSql, TiDB, CockroachCB, Etcd, to manage file directories. These stores are proven, scalable, and easier to manage.
 
 | SeaweedFS         | comparable to Ceph | advantage |
 | -------------  | ------------- | ---------------- |
@@ -434,6 +456,12 @@ go get github.com/chrislusf/seaweedfs/weed
 
 Once this is done, you will find the executable "weed" in your `$GOPATH/bin` directory
 
+Note:
+* If you got into this problem, try to `rm -Rf $GOPATH/src/go.etcd.io/etcd/vendor/golang.org/x/net/trace` and build again.
+```
+panic: /debug/requests is already registered. You may have two independent copies of golang.org/x/net/trace in your binary, trying to maintain separate state. This may involve a vendored copy of golang.org/x/net/trace.
+```
+
 Step 4: after you modify your code locally, you could start a local build by calling `go install` under
 
 ```
@@ -461,50 +489,49 @@ My Own Unscientific Single Machine Results on Mac Book with Solid State Disk, CP
 Write 1 million 1KB file:
 ```
 Concurrency Level:      16
-Time taken for tests:   88.796 seconds
+Time taken for tests:   66.753 seconds
 Complete requests:      1048576
 Failed requests:        0
-Total transferred:      1106764659 bytes
-Requests per second:    11808.87 [#/sec]
-Transfer rate:          12172.05 [Kbytes/sec]
+Total transferred:      1106789009 bytes
+Requests per second:    15708.23 [#/sec]
+Transfer rate:          16191.69 [Kbytes/sec]
 
 Connection Times (ms)
               min      avg        max      std
-Total:        0.2      1.3       44.8      0.9
+Total:        0.3      1.0       84.3      0.9
 
 Percentage of the requests served within a certain time (ms)
-   50%      1.1 ms
-   66%      1.3 ms
-   75%      1.5 ms
-   80%      1.7 ms
-   90%      2.1 ms
-   95%      2.6 ms
-   98%      3.7 ms
-   99%      4.6 ms
-  100%     44.8 ms
+   50%      0.8 ms
+   66%      1.0 ms
+   75%      1.1 ms
+   80%      1.2 ms
+   90%      1.4 ms
+   95%      1.7 ms
+   98%      2.1 ms
+   99%      2.6 ms
+  100%     84.3 ms
 ```
 
 Randomly read 1 million files:
 ```
 Concurrency Level:      16
-Time taken for tests:   34.263 seconds
+Time taken for tests:   22.301 seconds
 Complete requests:      1048576
 Failed requests:        0
-Total transferred:      1106762945 bytes
-Requests per second:    30603.34 [#/sec]
-Transfer rate:          31544.49 [Kbytes/sec]
+Total transferred:      1106812873 bytes
+Requests per second:    47019.38 [#/sec]
+Transfer rate:          48467.57 [Kbytes/sec]
 
 Connection Times (ms)
               min      avg        max      std
-Total:        0.0      0.5       20.7      0.7
+Total:        0.0      0.3       54.1      0.2
 
 Percentage of the requests served within a certain time (ms)
-   50%      0.4 ms
-   75%      0.5 ms
-   95%      0.6 ms
-   98%      0.8 ms
-   99%      1.2 ms
-  100%     20.7 ms
+   50%      0.3 ms
+   90%      0.4 ms
+   98%      0.6 ms
+   99%      0.7 ms
+  100%     54.1 ms
 ```
 
 [Back to TOC](#table-of-contents)

backers.md

@@ -6,6 +6,7 @@
 
 - [4Sight Imaging](https://www.4sightimaging.com/)
 - [Evercam Camera Management Software](https://evercam.io/)
+- [Admiral](https://getadmiral.com)
 
 <h2 align="center">Backers</h2>
 

docker/Dockerfile

@@ -1,15 +1,19 @@
-FROM frolvlad/alpine-glibc
+FROM alpine
 
-# Supercronic install settings
-ENV SUPERCRONIC_URL=https://github.com/aptible/supercronic/releases/download/v0.1.8/supercronic-linux-amd64 \
-    SUPERCRONIC=supercronic-linux-amd64 \
-    SUPERCRONIC_SHA1SUM=be43e64c45acd6ec4fce5831e03759c89676a0ea
-
-# Install SeaweedFS and Supercronic ( for cron job mode )
-# Tried to use curl only (curl -o /tmp/linux_amd64.tar.gz ...), however it turned out that the following tar command failed with "gzip: stdin: not in gzip format"
-RUN apk add --no-cache --virtual build-dependencies --update wget curl ca-certificates && \
-    wget -P /tmp https://github.com/$(curl -s -L https://github.com/chrislusf/seaweedfs/releases/latest | egrep -o 'chrislusf/seaweedfs/releases/download/.*/linux_amd64.tar.gz') && \
-    tar -C /usr/bin/ -xzvf /tmp/linux_amd64.tar.gz && \
+RUN \
+    ARCH=$(if [ $(uname -m) == "x86_64" ] && [ $(getconf LONG_BIT) == "64" ]; then echo "amd64"; \
+         elif [ $(uname -m) == "x86_64" ] && [ $(getconf LONG_BIT) == "32" ]; then echo "386"; \
+         elif [ $(uname -m) == "aarch64" ]; then echo "arm64"; \
+         elif [ $(uname -m) == "armv7l" ]; then echo "arm"; \
+         elif [ $(uname -m) == "armv6l" ]; then echo "arm"; fi;) && \
+    echo "Building for $ARCH" 1>&2 && \
+    SUPERCRONIC_SHA1SUM=$(echo $ARCH | sed 's/386/e0126b0102b9f388ecd55714358e3ad60d0cebdb/g' | sed 's/amd64/5ddf8ea26b56d4a7ff6faecdd8966610d5cb9d85/g' | sed 's/arm64/e2714c43e7781bf1579c85aa61259245f56dbba1/g' | sed 's/arm/47481c3341bc3a1ae91a728e0cc63c8e6d3791ad/g') && \
+    SUPERCRONIC_URL=https://github.com/aptible/supercronic/releases/download/v0.1.9/supercronic-linux-$ARCH && \
+    SUPERCRONIC=supercronic-linux-$ARCH && \
+    # Install SeaweedFS and Supercronic ( for cron job mode )
+    apk add --no-cache --virtual build-dependencies --update wget curl ca-certificates && \
+    wget -P /tmp https://github.com/$(curl -s -L https://github.com/chrislusf/seaweedfs/releases/latest | egrep -o "chrislusf/seaweedfs/releases/download/.*/linux_$ARCH.tar.gz") && \
+    tar -C /usr/bin/ -xzvf /tmp/linux_$ARCH.tar.gz && \
     curl -fsSLO "$SUPERCRONIC_URL" && \
     echo "${SUPERCRONIC_SHA1SUM}  ${SUPERCRONIC}" | sha1sum -c - && \
     chmod +x "$SUPERCRONIC" && \

docker/Dockerfile.go_build_large

@@ -0,0 +1,35 @@
+FROM frolvlad/alpine-glibc as builder
+RUN apk add git go g++
+RUN mkdir -p /go/src/github.com/chrislusf/
+RUN git clone https://github.com/chrislusf/seaweedfs /go/src/github.com/chrislusf/seaweedfs
+RUN cd /go/src/github.com/chrislusf/seaweedfs/weed && go install -tags 5BytesOffset
+
+FROM alpine AS final
+LABEL author="Chris Lu"
+COPY --from=builder /root/go/bin/weed /usr/bin/
+RUN mkdir -p /etc/seaweedfs
+COPY --from=builder /go/src/github.com/chrislusf/seaweedfs/docker/filer.toml /etc/seaweedfs/filer.toml
+COPY --from=builder /go/src/github.com/chrislusf/seaweedfs/docker/entrypoint.sh /entrypoint.sh
+
+# volume server gprc port
+EXPOSE 18080
+# volume server http port
+EXPOSE 8080
+# filer server gprc port
+EXPOSE 18888
+# filer server http port
+EXPOSE 8888
+# master server shared gprc port
+EXPOSE 19333
+# master server shared http port
+EXPOSE 9333
+# s3 server http port
+EXPOSE 8333
+
+RUN mkdir -p /data/filerldb2
+
+VOLUME /data
+
+RUN chmod +x /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

docker/Dockerfile.local

@@ -0,0 +1,29 @@
+FROM alpine AS final
+LABEL author="Chris Lu"
+COPY  ./weed /usr/bin/
+RUN mkdir -p /etc/seaweedfs
+COPY ./filer.toml /etc/seaweedfs/filer.toml
+COPY ./entrypoint.sh /entrypoint.sh
+
+# volume server grpc port
+EXPOSE 18080
+# volume server http port
+EXPOSE 8080
+# filer server grpc port
+EXPOSE 18888
+# filer server http port
+EXPOSE 8888
+# master server shared grpc port
+EXPOSE 19333
+# master server shared http port
+EXPOSE 9333
+# s3 server http port
+EXPOSE 8333
+
+RUN mkdir -p /data/filerldb2
+
+VOLUME /data
+
+RUN chmod +x /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

docker/Makefile

@@ -0,0 +1,19 @@
+all: gen
+
+.PHONY : gen
+
+gen: dev
+
+build:
+	cd ../weed; GOOS=linux go build; mv weed ../docker/
+	docker build --no-cache -t chrislusf/seaweedfs:local -f Dockerfile.local .
+	rm ./weed
+
+dev: build
+	docker-compose -f local-dev-compose.yml -p seaweedfs up
+
+cluster: build
+	docker-compose -f local-cluster-compose.yml -p seaweedfs up
+
+clean:
+	rm ./weed

docker/README.md

@@ -25,7 +25,15 @@ docker-compose -f seaweedfs-dev-compose.yml -p seaweedfs up
 
 ```bash
 cd $GOPATH/src/github.com/chrislusf/seaweedfs/docker
-
-docker-compose -f local-dev-compose.yml -p seaweedfs up
-
+make
 ```
+
+## Build and push a multiarch build
+
+Make sure that `docker buildx` is supported (might be an experimental docker feature)
+```bash
+BUILDER=$(docker buildx create --driver docker-container --use)
+docker buildx build --pull --push --platform linux/386,linux/amd64,linux/arm64,linux/arm/v7,linux/arm/v6 . -t chrislusf/seaweedfs
+docker buildx stop $BUILDER
+```
+

docker/entrypoint.sh

@@ -3,44 +3,33 @@
 case "$1" in
 
   'master')
-  	ARGS="-mdir /data"
-	# Is this instance linked with an other master? (Docker commandline "--link master1:master")
-	if [ -n "$MASTER_PORT_9333_TCP_ADDR" ] ; then
-		ARGS="$ARGS -peers=$MASTER_PORT_9333_TCP_ADDR:$MASTER_PORT_9333_TCP_PORT"
-	fi
+  	ARGS="-mdir=/data -volumePreallocate -volumeSizeLimitMB=1024"
   	exec /usr/bin/weed $@ $ARGS
 	;;
 
   'volume')
-  	ARGS="-ip `hostname -i` -dir /data"
-	# Is this instance linked with a master? (Docker commandline "--link master1:master")
-  	if [ -n "$MASTER_PORT_9333_TCP_ADDR" ] ; then
-		ARGS="$ARGS -mserver=$MASTER_PORT_9333_TCP_ADDR:$MASTER_PORT_9333_TCP_PORT"
-	fi
+  	ARGS="-dir=/data -max=0"
+  	if [[ $@ == *"-max="* ]]; then
+  	  ARGS="-dir=/data"
+  	fi
   	exec /usr/bin/weed $@ $ARGS
 	;;
 
   'server')
-  	ARGS="-ip `hostname -i` -dir /data"
-  	if [ -n "$MASTER_PORT_9333_TCP_ADDR" ] ; then
-		ARGS="$ARGS -master.peers=$MASTER_PORT_9333_TCP_ADDR:$MASTER_PORT_9333_TCP_PORT"
-	fi
+  	ARGS="-dir=/data -volume.max=0 -master.volumePreallocate -master.volumeSizeLimitMB=1024"
+  	if [[ $@ == *"-volume.max="* ]]; then
+  	  ARGS="-dir=/data -master.volumePreallocate -master.volumeSizeLimitMB=1024"
+  	fi
   	exec /usr/bin/weed $@ $ARGS
   	;;
 
   'filer')
   	ARGS=""
-  	if [ -n "$MASTER_PORT_9333_TCP_ADDR" ] ; then
-		ARGS="$ARGS -master=$MASTER_PORT_9333_TCP_ADDR:$MASTER_PORT_9333_TCP_PORT"
-	fi
   	exec /usr/bin/weed $@ $ARGS
 	;;
 
   's3')
   	ARGS="-domainName=$S3_DOMAIN_NAME -key.file=$S3_KEY_FILE -cert.file=$S3_CERT_FILE"
-  	if [ -n "$FILER_PORT_8888_TCP_ADDR" ] ; then
-		ARGS="$ARGS -filer=$FILER_PORT_8888_TCP_ADDR:$FILER_PORT_8888_TCP_PORT"
-	fi
   	exec /usr/bin/weed $@ $ARGS
 	;;
 

docker/local-cluster-compose.yml

@@ -0,0 +1,53 @@
+version: '2'
+
+services:
+  master0:
+    image: chrislusf/seaweedfs:local
+    ports:
+      - 9333:9333
+      - 19333:19333
+    command: "master -ip=master0 -port=9333 -peers=master0:9333,master1:9334,master2:9335"
+  master1:
+    image: chrislusf/seaweedfs:local
+    ports:
+      - 9334:9334
+      - 19334:19334
+    command: "master -ip=master1 -port=9334 -peers=master0:9333,master1:9334,master2:9335"
+  master2:
+    image: chrislusf/seaweedfs:local
+    ports:
+      - 9335:9335
+      - 19335:19335
+    command: "master -ip=master2 -port=9335 -peers=master0:9333,master1:9334,master2:9335"
+  volume:
+    image: chrislusf/seaweedfs:local
+    ports:
+      - 8080:8080
+      - 18080:18080
+    command: 'volume -mserver="master0:9333,master1:9334,master2:9335" -port=8080 -ip=volume'
+    depends_on:
+      - master0
+      - master1
+      - master2
+  filer:
+    image: chrislusf/seaweedfs:local
+    ports:
+      - 8888:8888
+      - 18888:18888
+    command: 'filer -master="master0:9333,master1:9334,master2:9335"'
+    depends_on:
+      - master0
+      - master1
+      - master2
+      - volume
+  s3:
+    image: chrislusf/seaweedfs:local
+    ports:
+      - 8333:8333
+    command: 's3 -filer="filer:8888"'
+    depends_on:
+      - master0
+      - master1
+      - master2
+      - volume
+      - filer

docker/local-dev-compose.yml

@@ -2,42 +2,34 @@ version: '2'
 
 services:
   master:
-    build:
-      context: .
-      dockerfile: Dockerfile.go_build
+    image: chrislusf/seaweedfs:local
     ports:
-    - 9333:9333
-    - 19333:19333
+      - 9333:9333
+      - 19333:19333
     command: "master -ip=master"
   volume:
-    build:
-      context: .
-      dockerfile: Dockerfile.go_build
+    image: chrislusf/seaweedfs:local
     ports:
-    - 8080:8080
-    - 18080:18080
-    command: '-v=2 volume -max=5 -mserver="master:9333" -port=8080 -ip=volume'
+      - 8080:8080
+      - 18080:18080
+    command: "volume -mserver=master:9333 -port=8080 -ip=volume"
     depends_on:
-    - master
+      - master
   filer:
-    build:
-      context: .
-      dockerfile: Dockerfile.go_build
+    image: chrislusf/seaweedfs:local
     ports:
-    - 8888:8888
-    - 18888:18888
-    command: '-v=4 filer -master="master:9333"'
+      - 8888:8888
+      - 18888:18888
+    command: 'filer -master="master:9333"'
     depends_on:
-    - master
-    - volume
+      - master
+      - volume
   s3:
-    build:
-      context: .
-      dockerfile: Dockerfile.go_build
+    image: chrislusf/seaweedfs:local
     ports:
-    - 8333:8333
-    command: '-v=4 s3 -filer="filer:8888"'
+      - 8333:8333
+    command: 's3 -filer="filer:8888"'
     depends_on:
-    - master
-    - volume
-    - filer
+      - master
+      - volume
+      - filer

docker/seaweedfs-compose.yml

@@ -4,28 +4,28 @@ services:
   master:
     image: chrislusf/seaweedfs # use a remote image
     ports:
-    - 9333:9333
-    - 19333:19333
+      - 9333:9333
+      - 19333:19333
     command: "master -ip=master"
   volume:
     image: chrislusf/seaweedfs # use a remote image
     ports:
-    - 8080:8080
-    - 18080:18080
-    command: 'volume -max=15 -mserver="master:9333" -port=8080'
+      - 8080:8080
+      - 18080:18080
+    command: 'volume -mserver="master:9333" -port=8080'
     depends_on:
-    - master
+      - master
   filer:
     image: chrislusf/seaweedfs # use a remote image
     ports:
-    - 8888:8888
-    - 18888:18888
+      - 8888:8888
+      - 18888:18888
     command: 'filer -master="master:9333"'
     tty: true
     stdin_open: true
     depends_on:
-    - master
-    - volume
+      - master
+      - volume
   cronjob:
     image: chrislusf/seaweedfs # use a remote image
     command: 'cronjob'
@@ -34,14 +34,14 @@ services:
       CRON_SCHEDULE: '*/2 * * * * *' # Default: '*/5 * * * * *'
       WEED_MASTER: master:9333 # Default: localhost:9333
     depends_on:
-    - master
-    - volume
+      - master
+      - volume
   s3:
     image: chrislusf/seaweedfs # use a remote image
     ports:
-    - 8333:8333
+      - 8333:8333
     command: 's3 -filer="filer:8888"'
     depends_on:
-    - master
-    - volume
-    - filer
+      - master
+      - volume
+      - filer

docker/seaweedfs-dev-compose.yml

@@ -4,32 +4,32 @@ services:
   master:
     image: chrislusf/seaweedfs:dev # use a remote dev image
     ports:
-    - 9333:9333
-    - 19333:19333
+      - 9333:9333
+      - 19333:19333
     command: "master -ip=master"
   volume:
     image: chrislusf/seaweedfs:dev # use a remote dev image
     ports:
-    - 8080:8080
-    - 18080:18080
-    command: '-v=2 volume -max=5 -mserver="master:9333" -port=8080 -ip=volume'
+      - 8080:8080
+      - 18080:18080
+    command: 'volume -mserver="master:9333" -port=8080 -ip=volume'
     depends_on:
-    - master
+      - master
   filer:
     image: chrislusf/seaweedfs:dev # use a remote dev image
     ports:
-    - 8888:8888
-    - 18888:18888
-    command: '-v=4 filer -master="master:9333"'
+      - 8888:8888
+      - 18888:18888
+    command: 'filer -master="master:9333"'
     depends_on:
-    - master
-    - volume
+      - master
+      - volume
   s3:
     image: chrislusf/seaweedfs:dev # use a remote dev image
     ports:
-    - 8333:8333
-    command: '-v=4 s3 -filer="filer:8888"'
+      - 8333:8333
+    command: 's3 -filer="filer:8888"'
     depends_on:
-    - master
-    - volume
-    - filer
+      - master
+      - volume
+      - filer

go.mod

@@ -6,94 +6,88 @@ require (
 	cloud.google.com/go v0.44.3
 	github.com/Azure/azure-pipeline-go v0.2.2 // indirect
 	github.com/Azure/azure-storage-blob-go v0.8.0
-	github.com/DataDog/zstd v1.4.1 // indirect
+	github.com/OneOfOne/xxhash v1.2.2
 	github.com/Shopify/sarama v1.23.1
-	github.com/aws/aws-sdk-go v1.23.13
-	github.com/chrislusf/raft v0.0.0-20190225081310-10d6e2182d92
-	github.com/coreos/etcd v3.3.15+incompatible // indirect
+	github.com/aws/aws-sdk-go v1.33.5
+	github.com/buraksezer/consistent v0.0.0-20191006190839-693edf70fd72
+	github.com/cespare/xxhash v1.1.0
+	github.com/chrislusf/raft v1.0.1
 	github.com/coreos/go-semver v0.3.0 // indirect
-	github.com/coreos/go-systemd v0.0.0-20190719114852-fd7a80b32e1f // indirect
 	github.com/dgrijalva/jwt-go v3.2.0+incompatible
-	github.com/disintegration/imaging v1.6.1
+	github.com/disintegration/imaging v1.6.2
 	github.com/dustin/go-humanize v1.0.0
 	github.com/eapache/go-resiliency v1.2.0 // indirect
 	github.com/facebookgo/clock v0.0.0-20150410010913-600d898af40a
+	github.com/facebookgo/ensure v0.0.0-20200202191622-63f1cf65ac4c // indirect
+	github.com/facebookgo/stack v0.0.0-20160209184415-751773369052 // indirect
 	github.com/facebookgo/stats v0.0.0-20151006221625-1b76add642e4
+	github.com/facebookgo/subset v0.0.0-20200203212716-c811ad88dec4 // indirect
 	github.com/frankban/quicktest v1.7.2 // indirect
-	github.com/gabriel-vasile/mimetype v1.0.0
-	github.com/go-redis/redis v6.15.2+incompatible
-	github.com/go-sql-driver/mysql v1.4.1
+	github.com/go-redis/redis v6.15.7+incompatible
+	github.com/go-sql-driver/mysql v1.5.0
 	github.com/gocql/gocql v0.0.0-20190829130954-e163eff7a8c6
 	github.com/gogo/protobuf v1.2.2-0.20190730201129-28a6bbf47e48 // indirect
-	github.com/golang/protobuf v1.3.2
+	github.com/golang/protobuf v1.4.2
 	github.com/google/btree v1.0.0
 	github.com/google/uuid v1.1.1
-	github.com/gorilla/mux v1.7.3
+	github.com/gorilla/mux v1.7.4
 	github.com/gorilla/websocket v1.4.1 // indirect
 	github.com/grpc-ecosystem/grpc-gateway v1.11.0 // indirect
 	github.com/hashicorp/golang-lru v0.5.3 // indirect
-	github.com/jacobsa/daemonize v0.0.0-20160101105449-e460293e890f
 	github.com/jcmturner/gofork v1.0.0 // indirect
+	github.com/json-iterator/go v1.1.10
 	github.com/karlseguin/ccache v2.0.3+incompatible
 	github.com/karlseguin/expect v1.0.1 // indirect
+	github.com/klauspost/compress v1.10.9
 	github.com/klauspost/cpuid v1.2.1 // indirect
 	github.com/klauspost/crc32 v1.2.0
 	github.com/klauspost/reedsolomon v1.9.2
-	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
 	github.com/kurin/blazer v0.5.3
 	github.com/lib/pq v1.2.0
 	github.com/magiconair/properties v1.8.1 // indirect
 	github.com/mattn/go-ieproxy v0.0.0-20190805055040-f9202b1cfdeb // indirect
 	github.com/mattn/go-runewidth v0.0.4 // indirect
 	github.com/nats-io/nats-server/v2 v2.0.4 // indirect
+	github.com/olivere/elastic/v7 v7.0.19
 	github.com/onsi/ginkgo v1.10.1 // indirect
 	github.com/onsi/gomega v1.7.0 // indirect
-	github.com/opentracing/opentracing-go v1.1.0 // indirect
-	github.com/pelletier/go-toml v1.4.0 // indirect
 	github.com/peterh/liner v1.1.0
 	github.com/pierrec/lz4 v2.2.7+incompatible // indirect
-	github.com/pingcap/kvproto v0.0.0-20191022073741-81b2a2d9e986 // indirect
-	github.com/pingcap/tidb v1.1.0-beta.0.20191023070859-58fc7d44f73b
-	github.com/pingcap/tipb v0.0.0-20191022094114-a2e8c3fa634b // indirect
 	github.com/prometheus/client_golang v1.1.0
-	github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4 // indirect
 	github.com/prometheus/procfs v0.0.4 // indirect
-	github.com/rakyll/statik v0.1.6
+	github.com/rakyll/statik v0.1.7
 	github.com/rcrowley/go-metrics v0.0.0-20190826022208-cac0b30c2563 // indirect
-	github.com/remyoudompheng/bigfft v0.0.0-20190728182440-6a916e37a237 // indirect
-	github.com/rwcarlsen/goexif v0.0.0-20190401172101-9e8deecbddbd
 	github.com/seaweedfs/fuse v0.0.0-20190510212405-310228904eff
-	github.com/sirupsen/logrus v1.4.2 // indirect
+	github.com/seaweedfs/goexif v1.0.2
 	github.com/spaolacci/murmur3 v1.1.0 // indirect
 	github.com/spf13/afero v1.2.2 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
 	github.com/spf13/viper v1.4.0
 	github.com/streadway/amqp v0.0.0-20190827072141-edfb9018d271 // indirect
-	github.com/stretchr/testify v1.4.0
+	github.com/stretchr/testify v1.5.1
 	github.com/syndtr/goleveldb v1.0.0
 	github.com/tidwall/gjson v1.3.2
 	github.com/tidwall/match v1.0.1
-	github.com/uber-go/atomic v1.4.0 // indirect
-	github.com/uber/jaeger-client-go v2.17.0+incompatible // indirect
-	github.com/uber/jaeger-lib v2.0.0+incompatible // indirect
 	github.com/willf/bitset v1.1.10 // indirect
 	github.com/willf/bloom v2.0.3+incompatible
 	github.com/wsxiaoys/terminal v0.0.0-20160513160801-0940f3fc43a0 // indirect
 	go.etcd.io/etcd v3.3.15+incompatible
+	go.mongodb.org/mongo-driver v1.3.2
 	gocloud.dev v0.16.0
 	gocloud.dev/pubsub/natspubsub v0.16.0
 	gocloud.dev/pubsub/rabbitpubsub v0.16.0
-	golang.org/x/image v0.0.0-20190829233526-b3c06291d021 // indirect
-	golang.org/x/net v0.0.0-20190909003024-a7b16738d86b
-	golang.org/x/sys v0.0.0-20190910064555-bbd175535a8b
-	golang.org/x/tools v0.0.0-20190911022129-16c5e0f7d110
+	golang.org/x/image v0.0.0-20200119044424-58c23975cae1 // indirect
+	golang.org/x/net v0.0.0-20200202094626-16171245cfb2
+	golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5
+	golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5
 	google.golang.org/api v0.9.0
 	google.golang.org/appengine v1.6.2 // indirect
-	google.golang.org/grpc v1.23.0
+	google.golang.org/grpc v1.29.1
+	google.golang.org/protobuf v1.24.0
+	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
 	gopkg.in/jcmturner/goidentity.v3 v3.0.0 // indirect
 	gopkg.in/jcmturner/gokrb5.v7 v7.3.0 // indirect
 	gopkg.in/karlseguin/expect.v1 v1.0.1 // indirect
-	sigs.k8s.io/yaml v1.1.0 // indirect
 )
 
-replace github.com/satori/go.uuid v1.2.0 => github.com/satori/go.uuid v0.0.0-20181028125025-b2ce2384e17b
+replace go.etcd.io/etcd => go.etcd.io/etcd v0.5.0-alpha.5.0.20200425165423-262c93980547

go.sum

@@ -32,16 +32,13 @@ github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/DataDog/zstd v1.3.6-0.20190409195224-796139022798 h1:2T/jmrHeTezcCM58lvEQXs0UpQJCo5SoGAcg+mbSTIg=
 github.com/DataDog/zstd v1.3.6-0.20190409195224-796139022798/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo=
-github.com/DataDog/zstd v1.4.1 h1:3oxKN3wbHibqx897utPC2LTQU4J+IHWWJO+glkAkpFM=
-github.com/DataDog/zstd v1.4.1/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo=
 github.com/GoogleCloudPlatform/cloudsql-proxy v0.0.0-20190605020000-c4ba1fdf4d36/go.mod h1:aJ4qN3TfrelA6NZ6AXsXRfmEVaYin3EDbSPJrKS8OXo=
+github.com/OneOfOne/xxhash v1.2.2 h1:KMrpdQIwFcEqXDklaen+P1axHaj9BSKzvpUUfnHldSE=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/Shopify/sarama v1.23.1 h1:XxJBCZEoWJtoWjf/xRbmGUpAmTZGnuuF0ON0EvxxBrs=
 github.com/Shopify/sarama v1.23.1/go.mod h1:XLH1GYJnLVE0XCr6KdJGVJRTwY30moWNJ4sERjXX6fs=
 github.com/Shopify/toxiproxy v2.1.4+incompatible h1:TKdv8HiTLgE5wdJuEML90aBgNWsokNbMijUGhmcoBJc=
 github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
-github.com/StackExchange/wmi v0.0.0-20180725035823-b12b22c5341f h1:5ZfJxyXo8KyX8DgGXC5B7ILL8y51fci/qYz2B4j8iLY=
-github.com/StackExchange/wmi v0.0.0-20180725035823-b12b22c5341f/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
@@ -50,6 +47,8 @@ github.com/aws/aws-sdk-go v1.19.18/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpi
 github.com/aws/aws-sdk-go v1.19.45/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/aws/aws-sdk-go v1.23.13 h1:l/NG+mgQFRGG3dsFzEj0jw9JIs/zYdtU6MXhY1WIDmM=
 github.com/aws/aws-sdk-go v1.23.13/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
+github.com/aws/aws-sdk-go v1.33.5 h1:p2fr1ryvNTU6avUWLI+/H7FGv0TBIjzVM5WDgXBBv4U=
+github.com/aws/aws-sdk-go v1.33.5/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0 h1:HWo1m869IqiPhD389kmkxeTalrjNbbJTC8LXupb+sl0=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
@@ -58,60 +57,48 @@ github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6r
 github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
 github.com/bitly/go-hostpool v0.0.0-20171023180738-a3a6125de932 h1:mXoPYz/Ul5HYEDvkta6I8/rnYM5gSdSV2tJ6XbZuEtY=
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@@ -168,7 +179,6 @@ github.com/gogo/protobuf v1.2.2-0.20190730201129-28a6bbf47e48/go.mod h1:SlYgWuQ5
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@@ -176,16 +186,24 @@ github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4er
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@@ -194,6 +212,10 @@ github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY=
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@@ -204,7 +226,7 @@ github.com/google/martian v2.1.1-0.20190517191504-25dcb96d9e51+incompatible h1:x
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@@ -216,14 +238,9 @@ github.com/googleapis/gax-go v2.0.2+incompatible/go.mod h1:SFVmujtThgffbyetf+mdk
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@@ -234,12 +251,11 @@ github.com/grpc-ecosystem/go-grpc-middleware v1.0.1-0.20190118093823-f849b5445de
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@@ -256,8 +272,6 @@ github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T
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@@ -626,8 +596,11 @@ golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR
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@@ -637,6 +610,7 @@ golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJ
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@@ -649,18 +623,19 @@ golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5h
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@@ -677,17 +652,25 @@ golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3
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@@ -703,9 +686,7 @@ google.golang.org/appengine v1.6.1 h1:QzqyMA1tlu6CgqCDUtU9V+ZKhLFT2dkJuANu5QaxI3
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@@ -714,20 +695,34 @@ google.golang.org/genproto v0.0.0-20190508193815-b515fa19cec8/go.mod h1:VzzqZJRn
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@@ -735,9 +730,9 @@ gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8
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@@ -754,8 +749,6 @@ gopkg.in/jcmturner/rpc.v1 v1.1.0 h1:QHIUxTX1ISuAv9dD2wJ9HWQVuWDX/Zc0PfeC2tjc4rU=
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 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
@@ -767,10 +760,9 @@ honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.1-2019.2.3 h1:3JgtbtFHMiCmsznwGVTUWbgGov+pVqnlf1dEJTNAXeM=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 pack.ag/amqp v0.11.2/go.mod h1:4/cbmt4EJXSKlG6LCfWHoqmN0uFdy5i/+YFz+fTfhV4=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 sigs.k8s.io/yaml v1.1.0 h1:4A07+ZFc2wgJwo8YNlQpr1rVlgUDlxXHhPJciaPY5gs=
 sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
-sourcegraph.com/sourcegraph/appdash v0.0.0-20180531100431-4c381bd170b4 h1:VO9oZbbkvTwqLimlQt15QNdOOBArT2dw/bvzsMZBiqQ=
-sourcegraph.com/sourcegraph/appdash v0.0.0-20180531100431-4c381bd170b4/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU=
-sourcegraph.com/sourcegraph/appdash-data v0.0.0-20151005221446-73f23eafcf67/go.mod h1:L5q+DGLGOQFpo1snNEkLOJT2d1YTW66rWNzatr3He1k=

k8s/README.md

@@ -0,0 +1,23 @@
+## SEAWEEDFS - helm chart (2.x)
+
+### info:
+* master/filer/volume are stateful sets with anti-affinity on the hostname,
+so your deployment will be spread/HA.
+* chart is using memsql(mysql) as the filer backend to enable HA (multiple filer instances)
+and backup/HA memsql can provide.
+* mysql user/password are created in a k8s secret (secret-seaweedfs-db.yaml) and injected to the filer
+with ENV.
+* cert config exists and can be enabled, but not been tested.
+
+### current instances config (AIO):
+1 instance for each type (master/filer/volume/s3)
+
+instances need node labels:
+* sw-volume: true  (for volume instance, specific tag)
+* sw-backend: true (for all others, as they less resource demanding)
+
+you can update the replicas count for each node type in values.yaml,
+need to add more nodes with the corresponding label.
+
+most of the configuration are available through values.yaml
+

k8s/seaweedfs/.helmignore

@@ -0,0 +1,22 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

k8s/seaweedfs/Chart.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+description: SeaweedFS
+name: seaweedfs
+version: 2.02

k8s/seaweedfs/templates/_helpers.tpl

@@ -0,0 +1,114 @@
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to
+this (by the DNS naming spec). If release name contains chart name it will
+be used as a full name.
+*/}}
+{{- define "seaweedfs.fullname" -}}
+{{- if .Values.fullnameOverride -}}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- $name := default .Chart.Name .Values.nameOverride -}}
+{{- if contains $name .Release.Name -}}
+{{- .Release.Name | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{- end -}}
+{{- end -}}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "seaweedfs.chart" -}}
+{{- printf "%s-helm" .Chart.Name | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "seaweedfs.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Inject extra environment vars in the format key:value, if populated
+*/}}
+{{- define "seaweedfs.extraEnvironmentVars" -}}
+{{- if .extraEnvironmentVars -}}
+{{- range $key, $value := .extraEnvironmentVars }}
+- name: {{ $key }}
+  value: {{ $value | quote }}
+{{- end -}}
+{{- end -}}
+{{- end -}}
+
+{{/* Return the proper filer image */}}
+{{- define "filer.image" -}}
+{{- if .Values.filer.imageOverride -}}
+{{- $imageOverride := .Values.filer.imageOverride -}}
+{{- printf "%s" $imageOverride -}}
+{{- else -}}
+{{- $registryName := default .Values.image.registry .Values.global.localRegistry | toString -}}
+{{- $repositoryName := .Values.image.repository | toString -}}
+{{- $name := .Values.global.imageName | toString -}}
+{{- $tag := .Values.global.imageTag | toString -}}
+{{- printf "%s%s%s:%s" $registryName $repositoryName $name $tag -}}
+{{- end -}}
+{{- end -}}
+
+{{/* Return the proper postgresqlSchema image */}}
+{{- define "filer.dbSchema.image" -}}
+{{- if .Values.filer.dbSchema.imageOverride -}}
+{{- $imageOverride := .Values.filer.dbSchema.imageOverride -}}
+{{- printf "%s" $imageOverride -}}
+{{- else -}}
+{{- $registryName := default .Values.global.registry .Values.global.localRegistry | toString -}}
+{{- $repositoryName := .Values.global.repository | toString -}}
+{{- $name := .Values.filer.dbSchema.imageName | toString -}}
+{{- $tag := .Values.filer.dbSchema.imageTag | toString -}}
+{{- printf "%s%s%s:%s" $registryName $repositoryName $name $tag -}}
+{{- end -}}
+{{- end -}}
+
+{{/* Return the proper master image */}}
+{{- define "master.image" -}}
+{{- if .Values.master.imageOverride -}}
+{{- $imageOverride := .Values.master.imageOverride -}}
+{{- printf "%s" $imageOverride -}}
+{{- else -}}
+{{- $registryName := default .Values.image.registry .Values.global.localRegistry | toString -}}
+{{- $repositoryName := .Values.image.repository | toString -}}
+{{- $name := .Values.global.imageName | toString -}}
+{{- $tag := .Values.global.imageTag | toString -}}
+{{- printf "%s%s%s:%s" $registryName $repositoryName $name $tag -}}
+{{- end -}}
+{{- end -}}
+
+{{/* Return the proper s3 image */}}
+{{- define "s3.image" -}}
+{{- if .Values.s3.imageOverride -}}
+{{- $imageOverride := .Values.s3.imageOverride -}}
+{{- printf "%s" $imageOverride -}}
+{{- else -}}
+{{- $registryName := default .Values.image.registry .Values.global.localRegistry | toString -}}
+{{- $repositoryName := .Values.image.repository | toString -}}
+{{- $name := .Values.global.imageName | toString -}}
+{{- $tag := .Values.global.imageTag | toString -}}
+{{- printf "%s%s%s:%s" $registryName $repositoryName $name $tag -}}
+{{- end -}}
+{{- end -}}
+
+{{/* Return the proper volume image */}}
+{{- define "volume.image" -}}
+{{- if .Values.volume.imageOverride -}}
+{{- $imageOverride := .Values.volume.imageOverride -}}
+{{- printf "%s" $imageOverride -}}
+{{- else -}}
+{{- $registryName := default .Values.image.registry .Values.global.localRegistry | toString -}}
+{{- $repositoryName := .Values.image.repository | toString -}}
+{{- $name := .Values.global.imageName | toString -}}
+{{- $tag := .Values.global.imageTag | toString -}}
+{{- printf "%s%s%s:%s" $registryName $repositoryName $name $tag -}}
+{{- end -}}
+{{- end -}}

k8s/seaweedfs/templates/ca-cert.yaml

@@ -0,0 +1,14 @@
+{{- if .Values.global.enableSecurity }}
+apiVersion: certmanager.k8s.io/v1alpha1
+kind: Certificate
+metadata:
+  name: {{ template "seaweedfs.name" . }}-ca-cert
+  namespace: {{ .Release.Namespace }}
+spec:
+  secretName: {{ template "seaweedfs.name" . }}-ca-cert
+  commonName: "{{ template "seaweedfs.name" . }}-root-ca"
+  isCA: true
+  issuerRef:
+    name: {{ template "seaweedfs.name" . }}-clusterissuer
+    kind: ClusterIssuer
+{{- end }}

k8s/seaweedfs/templates/cert-clusterissuer.yaml

@@ -0,0 +1,8 @@
+{{- if .Values.global.enableSecurity }}
+apiVersion: certmanager.k8s.io/v1alpha1
+kind: ClusterIssuer
+metadata:
+  name: {{ template "seaweedfs.name" . }}-clusterissuer
+spec:
+  selfSigned: {}
+{{- end }}

k8s/seaweedfs/templates/client-cert.yaml

@@ -0,0 +1,33 @@
+{{- if .Values.global.enableSecurity }}
+apiVersion: certmanager.k8s.io/v1alpha1
+kind: Certificate
+metadata:
+  name: {{ template "seaweedfs.name" . }}-client-cert
+  namespace: {{ .Release.Namespace }}
+spec:
+  secretName: {{ template "seaweedfs.name" . }}-client-cert
+  issuerRef:
+    name: {{ template "seaweedfs.name" . }}-clusterissuer
+    kind: ClusterIssuer
+  commonName: {{ .Values.certificates.commonName }}
+  organization:
+    - "SeaweedFS CA"
+  dnsNames:
+    - '*.{{ .Release.Namespace }}'
+    - '*.{{ .Release.Namespace }}.svc'
+    - '*.{{ .Release.Namespace }}.svc.cluster.local'
+    - '*.{{ template "seaweedfs.name" . }}-master'
+    - '*.{{ template "seaweedfs.name" . }}-master.{{ .Release.Namespace }}'
+    - '*.{{ template "seaweedfs.name" . }}-master.{{ .Release.Namespace }}.svc'
+    - '*.{{ template "seaweedfs.name" . }}-master.{{ .Release.Namespace }}.svc.cluster.local'
+{{- if .Values.certificates.ipAddresses }}
+  ipAddresses:
+    {{- range .Values.certificates.ipAddresses }}
+    - {{ . }}
+    {{- end }}
+{{- end }}
+  keyAlgorithm: {{ .Values.certificates.keyAlgorithm }}
+  keySize: {{ .Values.certificates.keySize }}
+  duration: {{ .Values.certificates.duration }}
+  renewBefore: {{ .Values.certificates.renewBefore }}
+{{- end }}

k8s/seaweedfs/templates/filer-cert.yaml

@@ -0,0 +1,33 @@
+{{- if .Values.global.enableSecurity }}
+apiVersion: certmanager.k8s.io/v1alpha1
+kind: Certificate
+metadata:
+  name: {{ template "seaweedfs.name" . }}-filer-cert
+  namespace: {{ .Release.Namespace }}
+spec:
+  secretName: {{ template "seaweedfs.name" . }}-filer-cert
+  issuerRef:
+    name: {{ template "seaweedfs.name" . }}-clusterissuer
+    kind: ClusterIssuer
+  commonName: {{ .Values.certificates.commonName }}
+  organization:
+    - "SeaweedFS CA"
+  dnsNames:
+    - '*.{{ .Release.Namespace }}'
+    - '*.{{ .Release.Namespace }}.svc'
+    - '*.{{ .Release.Namespace }}.svc.cluster.local'
+    - '*.{{ template "seaweedfs.name" . }}-master'
+    - '*.{{ template "seaweedfs.name" . }}-master.{{ .Release.Namespace }}'
+    - '*.{{ template "seaweedfs.name" . }}-master.{{ .Release.Namespace }}.svc'
+    - '*.{{ template "seaweedfs.name" . }}-master.{{ .Release.Namespace }}.svc.cluster.local'
+{{- if .Values.certificates.ipAddresses }}
+  ipAddresses:
+    {{- range .Values.certificates.ipAddresses }}
+    - {{ . }}
+    {{- end }}
+{{- end }}
+  keyAlgorithm: {{ .Values.certificates.keyAlgorithm }}
+  keySize: {{ .Values.certificates.keySize }}
+  duration: {{ .Values.certificates.duration }}
+  renewBefore: {{ .Values.certificates.renewBefore }}
+{{- end }}

k8s/seaweedfs/templates/filer-service.yaml

@@ -0,0 +1,22 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ template "seaweedfs.name" . }}-filer
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app: {{ template "seaweedfs.name" . }}
+    component: filer
+spec:
+  clusterIP: None
+  ports:
+  - name: "swfs-filer"
+    port: {{ .Values.filer.port }}
+    targetPort: {{ .Values.filer.port }}
+    protocol: TCP
+  - name: "swfs-filer-grpc"
+    port: {{ .Values.filer.grpcPort }}
+    targetPort: {{ .Values.filer.grpcPort }}
+    protocol: TCP
+  selector:
+    app: {{ template "seaweedfs.name" . }}
+    component: filer

k8s/seaweedfs/templates/filer-statefulset.yaml

@@ -0,0 +1,229 @@
+{{- if .Values.filer.enabled }}
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: {{ template "seaweedfs.name" . }}-filer
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app: {{ template "seaweedfs.name" . }}
+    chart: {{ template "seaweedfs.chart" . }}
+    heritage: {{ .Release.Service }}
+    release: {{ .Release.Name }}
+spec:
+  serviceName: {{ template "seaweedfs.name" . }}-filer
+  podManagementPolicy: Parallel
+  replicas: {{ .Values.filer.replicas }}
+  {{- if (gt (int .Values.filer.updatePartition) 0) }}
+  updateStrategy:
+    type: RollingUpdate
+    rollingUpdate:
+      partition: {{ .Values.filer.updatePartition }}
+  {{- end }}
+  selector:
+    matchLabels:
+      app: {{ template "seaweedfs.name" . }}
+      chart: {{ template "seaweedfs.chart" . }}
+      release: {{ .Release.Name }}
+      component: filer
+  template:
+    metadata:
+      labels:
+        app: {{ template "seaweedfs.name" . }}
+        chart: {{ template "seaweedfs.chart" . }}
+        release: {{ .Release.Name }}
+        component: filer
+    spec:
+      restartPolicy: {{ default .Values.global.restartPolicy .Values.filer.restartPolicy }}
+      {{- if .Values.filer.affinity }}
+      affinity:
+        {{ tpl .Values.filer.affinity . | nindent 8 | trim }}
+      {{- end }}
+      {{- if .Values.filer.tolerations }}
+      tolerations:
+        {{ tpl .Values.filer.tolerations . | nindent 8 | trim }}
+      {{- end }}
+      {{- if .Values.global.imagePullSecrets }}
+      imagePullSecrets:
+        - name: {{ .Values.global.imagePullSecrets }}
+      {{- end }}
+      serviceAccountName: seaweefds-rw-sa #hack for delete pod master after migration
+      terminationGracePeriodSeconds: 60
+      {{- if .Values.filer.priorityClassName }}
+      priorityClassName: {{ .Values.filer.priorityClassName | quote }}
+      {{- end }}
+      enableServiceLinks: false
+      containers:
+        - name: seaweedfs
+          image: {{ template "filer.image" . }}
+          imagePullPolicy: {{ default "IfNotPresent" .Values.global.imagePullPolicy }}
+          env:
+            - name: POD_IP
+              valueFrom:
+                fieldRef:
+                  fieldPath: status.podIP
+            - name: POD_NAME
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.name
+            - name: NAMESPACE
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.namespace
+            - name: WEED_MYSQL_USERNAME
+              valueFrom:
+                secretKeyRef:
+                  name: secret-seaweedfs-db
+                  key: user
+            - name: WEED_MYSQL_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: secret-seaweedfs-db
+                  key: password
+            - name: SEAWEEDFS_FULLNAME
+              value: "{{ template "seaweedfs.name" . }}"
+            {{- if .Values.filer.extraEnvironmentVars }}
+            {{- range $key, $value := .Values.filer.extraEnvironmentVars }}
+            - name: {{ $key }}
+              value: {{ $value | quote }}
+            {{- end }}
+            {{- end }}
+          command:
+            - "/bin/sh"
+            - "-ec"
+            - | 
+              exec /usr/bin/weed -logdir=/logs \
+              {{- if .Values.filer.loggingOverrideLevel }}
+              -v={{ .Values.filer.loggingOverrideLevel }} \
+              {{- else }}
+              -v={{ .Values.global.loggingLevel }} \
+              {{- end }}
+              filer \
+              -port={{ .Values.filer.port }} \
+              {{- if .Values.filer.redirectOnRead }}
+              -redirectOnRead \
+              {{- end }}
+              {{- if .Values.filer.disableHttp }}
+              -disableHttp \
+              {{- end }}
+              {{- if .Values.filer.disableDirListing }}
+              -disableDirListing \
+              {{- end }}
+              -dirListLimit={{ .Values.filer.dirListLimit }} \
+              {{- if .Values.global.enableReplication }}
+              -defaultReplicaPlacement={{ .Values.global.replicationPlacment }} \
+              {{- else }}
+              -defaultReplicaPlacement={{ .Values.filer.defaultReplicaPlacement }} \
+              {{- end }}
+              {{- if .Values.filer.disableDirListing }}
+              -disableDirListing \
+              {{- end }}
+              {{- if .Values.filer.maxMB }}
+              -maxMB={{ .Values.filer.maxMB }} \
+              {{- end }}
+              {{- if .Values.filer.encryptVolumeData }}
+              -encryptVolumeData \
+              {{- end }}
+              -ip=${POD_IP} \
+              {{- if gt (.Values.filer.replicas | int) 1 }}
+              -peers={{ range $index := until (.Values.filer.replicas | int) }}${SEAWEEDFS_FULLNAME}-filer-{{ $index }}.${SEAWEEDFS_FULLNAME}-filer:{{ $.Values.filer.port }}{{ if lt $index (sub ($.Values.filer.replicas | int) 1) }},{{ end }}{{ end }}
+              {{- end }}
+              -master={{ range $index := until (.Values.master.replicas | int) }}${SEAWEEDFS_FULLNAME}-master-{{ $index }}.${SEAWEEDFS_FULLNAME}-master:{{ $.Values.master.port }}{{ if lt $index (sub ($.Values.master.replicas | int) 1) }},{{ end }}{{ end }}
+          {{- if or (.Values.global.enableSecurity) (.Values.filer.extraVolumeMounts) }}    
+          volumeMounts:
+            - name: seaweedfs-filer-log-volume
+              mountPath: "/logs/"
+            {{- if .Values.global.enableSecurity }}
+            - name: security-config
+              readOnly: true
+              mountPath: /etc/seaweedfs/security.toml
+              subPath: security.toml
+            - name: ca-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/ca/
+            - name: master-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/master/
+            - name: volume-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/volume/
+            - name: filer-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/filer/
+            - name: client-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/client/
+            {{- end }}
+            {{ tpl .Values.filer.extraVolumeMounts . | nindent 12 | trim }}
+          {{- end }}
+          ports:
+            - containerPort: {{ .Values.filer.port }}
+              name: swfs-filer
+            - containerPort: {{ .Values.filer.grpcPort }}
+              #name: swfs-filer-grpc
+          readinessProbe:
+            httpGet:
+              path: /
+              port: {{ .Values.filer.port }}
+              scheme: HTTP
+            initialDelaySeconds: 10
+            periodSeconds: 15
+            successThreshold: 1
+            failureThreshold: 100
+            timeoutSeconds: 3
+          livenessProbe:
+            httpGet:
+              path: /
+              port: {{ .Values.filer.port }}
+              scheme: HTTP
+            initialDelaySeconds: 20
+            periodSeconds: 30
+            successThreshold: 1
+            failureThreshold: 5
+            timeoutSeconds: 3
+          {{- if .Values.filer.resources }}
+          resources:
+            {{ tpl .Values.filer.resources . | nindent 12 | trim }}
+          {{- end }}
+      volumes:
+        - name: seaweedfs-filer-log-volume
+          hostPath:
+            path: /storage/logs/seaweedfs/filer
+            type: DirectoryOrCreate
+        {{- if .Values.global.enableSecurity }}
+        - name: security-config
+          configMap:
+            name: {{ template "seaweedfs.name" . }}-security-config
+        - name: ca-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-ca-cert
+        - name: master-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-master-cert
+        - name: volume-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-volume-cert
+        - name: filer-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-filer-cert
+        - name: client-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-client-cert
+        {{- end }}
+        {{ tpl .Values.filer.extraVolumes . | indent 8 | trim }}
+      {{- if .Values.filer.nodeSelector }}
+      nodeSelector:
+        {{ tpl .Values.filer.nodeSelector . | indent 8 | trim }}
+      {{- end }}
+{{/*  volumeClaimTemplates:*/}}
+{{/*    - metadata:*/}}
+{{/*        name: data-{{ .Release.Namespace }}*/}}
+{{/*      spec:*/}}
+{{/*        accessModes:*/}}
+{{/*          - ReadWriteOnce*/}}
+{{/*        resources:*/}}
+{{/*          requests:*/}}
+{{/*            storage: {{ .Values.filer.storage }}*/}}
+{{/*        {{- if .Values.filer.storageClass }}*/}}
+{{/*        storageClassName: {{ .Values.filer.storageClass }}*/}}
+{{/*      {{- end }}*/}}
+{{- end }}

k8s/seaweedfs/templates/ingress.yaml

@@ -0,0 +1,59 @@
+apiVersion: extensions/v1beta1
+kind: Ingress
+metadata:
+ name: ingress-{{ template "seaweedfs.name" . }}-filer
+ annotations:
+   kubernetes.io/ingress.class: "nginx"
+   nginx.ingress.kubernetes.io/auth-type: "basic"
+   nginx.ingress.kubernetes.io/auth-secret: "default/ingress-basic-auth-secret"
+   nginx.ingress.kubernetes.io/auth-realm: 'Authentication Required - SW-Filer'
+   nginx.ingress.kubernetes.io/service-upstream: "true"
+   nginx.ingress.kubernetes.io/rewrite-target: /$1
+   nginx.ingress.kubernetes.io/use-regex: "true"
+   nginx.ingress.kubernetes.io/enable-rewrite-log: "true"
+   nginx.ingress.kubernetes.io/ssl-redirect: "false"
+   nginx.ingress.kubernetes.io/force-ssl-redirect: "false"
+   nginx.ingress.kubernetes.io/configuration-snippet: |
+     sub_filter '<head>' '<head> <base href="/sw-filer/">'; #add base url
+     sub_filter '="/' '="./';                               #make absolute paths to relative
+     sub_filter '=/' '=./';
+     sub_filter '/seaweedfsstatic' './seaweedfsstatic';
+     sub_filter_once off;
+spec:
+ rules:
+ - http:
+     paths:
+     - path: /sw-filer/?(.*)
+       backend:
+         serviceName: {{ template "seaweedfs.name" . }}-filer
+         servicePort: {{ .Values.filer.port }}
+---
+apiVersion: extensions/v1beta1
+kind: Ingress
+metadata:
+  name: ingress-{{ template "seaweedfs.name" . }}-master
+  annotations:
+    kubernetes.io/ingress.class: "nginx"
+    nginx.ingress.kubernetes.io/auth-type: "basic"
+    nginx.ingress.kubernetes.io/auth-secret: "default/ingress-basic-auth-secret"
+    nginx.ingress.kubernetes.io/auth-realm: 'Authentication Required - SW-Master'
+    nginx.ingress.kubernetes.io/service-upstream: "true"
+    nginx.ingress.kubernetes.io/rewrite-target: /$1
+    nginx.ingress.kubernetes.io/use-regex: "true"
+    nginx.ingress.kubernetes.io/enable-rewrite-log: "true"
+    nginx.ingress.kubernetes.io/ssl-redirect: "false"
+    nginx.ingress.kubernetes.io/force-ssl-redirect: "false"
+    nginx.ingress.kubernetes.io/configuration-snippet: |
+      sub_filter '<head>' '<head> <base href="/sw-master/">'; #add base url
+      sub_filter '="/' '="./';                                #make absolute paths to relative
+      sub_filter '=/' '=./';
+      sub_filter '/seaweedfsstatic' './seaweedfsstatic';
+      sub_filter_once off;
+spec:
+  rules:
+  - http:
+      paths:
+      - path: /sw-master/?(.*)
+        backend:
+          serviceName: {{ template "seaweedfs.name" . }}-master
+          servicePort: {{ .Values.master.port }}

k8s/seaweedfs/templates/master-cert.yaml

@@ -0,0 +1,33 @@
+{{- if .Values.global.enableSecurity }}
+apiVersion: certmanager.k8s.io/v1alpha1
+kind: Certificate
+metadata:
+  name: {{ template "seaweedfs.name" . }}-master-cert
+  namespace: {{ .Release.Namespace }}
+spec:
+  secretName: {{ template "seaweedfs.name" . }}-master-cert
+  issuerRef:
+    name: {{ template "seaweedfs.name" . }}-clusterissuer
+    kind: ClusterIssuer
+  commonName: {{ .Values.certificates.commonName }}
+  organization:
+    - "SeaweedFS CA"
+  dnsNames:
+    - '*.{{ .Release.Namespace }}'
+    - '*.{{ .Release.Namespace }}.svc'
+    - '*.{{ .Release.Namespace }}.svc.cluster.local'
+    - '*.{{ template "seaweedfs.name" . }}-master'
+    - '*.{{ template "seaweedfs.name" . }}-master.{{ .Release.Namespace }}'
+    - '*.{{ template "seaweedfs.name" . }}-master.{{ .Release.Namespace }}.svc'
+    - '*.{{ template "seaweedfs.name" . }}-master.{{ .Release.Namespace }}.svc.cluster.local'
+{{- if .Values.certificates.ipAddresses }}
+  ipAddresses:
+    {{- range .Values.certificates.ipAddresses }}
+    - {{ . }}
+    {{- end }}
+{{- end }}
+  keyAlgorithm: {{ .Values.certificates.keyAlgorithm }}
+  keySize: {{ .Values.certificates.keySize }}
+  duration: {{ .Values.certificates.duration }}
+  renewBefore: {{ .Values.certificates.renewBefore }}
+{{- end }}

k8s/seaweedfs/templates/master-service.yaml

@@ -0,0 +1,24 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ template "seaweedfs.name" . }}-master
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app: {{ template "seaweedfs.name" . }}
+    component: master
+  annotations:
+    service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"    
+spec:
+  clusterIP: None
+  ports:
+  - name: "swfs-master"
+    port: {{ .Values.master.port }}
+    targetPort: {{ .Values.master.port }}
+    protocol: TCP
+  - name: "swfs-master-grpc"
+    port: {{ .Values.master.grpcPort }}
+    targetPort: {{ .Values.master.grpcPort }}
+    protocol: TCP
+  selector:
+    app: {{ template "seaweedfs.name" . }}
+    component: master

k8s/seaweedfs/templates/master-statefulset.yaml

@@ -0,0 +1,221 @@
+{{- if .Values.master.enabled }}
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: {{ template "seaweedfs.name" . }}-master
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app: {{ template "seaweedfs.name" . }}
+    chart: {{ template "seaweedfs.chart" . }}
+    heritage: {{ .Release.Service }}
+    release: {{ .Release.Name }}
+spec:
+  serviceName: {{ template "seaweedfs.name" . }}-master
+  podManagementPolicy: Parallel
+  replicas: {{ .Values.master.replicas }}
+  {{- if (gt (int .Values.master.updatePartition) 0) }}
+  updateStrategy:
+    type: RollingUpdate
+    rollingUpdate:
+      partition: {{ .Values.master.updatePartition }}
+  {{- end }}
+  selector:
+    matchLabels:
+      app: {{ template "seaweedfs.name" . }}
+      chart: {{ template "seaweedfs.chart" . }}
+      release: {{ .Release.Name }}
+      component: master
+  template:
+    metadata:
+      labels:
+        app: {{ template "seaweedfs.name" . }}
+        chart: {{ template "seaweedfs.chart" . }}
+        release: {{ .Release.Name }}
+        component: master
+    spec:
+      restartPolicy: {{ default .Values.global.restartPolicy .Values.master.restartPolicy }}
+      {{- if .Values.master.affinity }}
+      affinity:
+        {{ tpl .Values.master.affinity . | nindent 8 | trim }}
+      {{- end }}
+      {{- if .Values.master.tolerations }}
+      tolerations:
+        {{ tpl .Values.master.tolerations . | nindent 8 | trim }}
+      {{- end }}
+      {{- if .Values.global.imagePullSecrets }}
+      imagePullSecrets:
+        - name: {{ .Values.global.imagePullSecrets }}
+      {{- end }}
+      terminationGracePeriodSeconds: 60
+      {{- if .Values.master.priorityClassName }}
+      priorityClassName: {{ .Values.master.priorityClassName | quote }}
+      {{- end }}
+      enableServiceLinks: false
+      containers:
+        - name: seaweedfs
+          image: {{ template "master.image" . }}
+          imagePullPolicy: {{ default "IfNotPresent" .Values.global.imagePullPolicy }}
+          env:
+            - name: POD_IP
+              valueFrom:
+                fieldRef:
+                  fieldPath: status.podIP
+            - name: POD_NAME
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.name
+            - name: NAMESPACE
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.namespace
+            - name: SEAWEEDFS_FULLNAME
+              value: "{{ template "seaweedfs.name" . }}"
+            {{- if .Values.master.extraEnvironmentVars }}
+            {{- range $key, $value := .Values.master.extraEnvironmentVars }}
+            - name: {{ $key }}
+              value: {{ $value | quote }}
+            {{- end }}
+            {{- end }}
+          command:
+            - "/bin/sh"
+            - "-ec"
+            - | 
+              exec /usr/bin/weed -logdir=/logs \
+              {{- if .Values.master.loggingOverrideLevel }}
+              -v={{ .Values.master.loggingOverrideLevel }} \
+              {{- else }}
+              -v={{ .Values.global.loggingLevel }} \
+              {{- end }}
+              master \
+              -port={{ .Values.master.port }} \
+              -mdir=/data \
+              -ip.bind={{ .Values.master.ipBind }} \
+              {{- if .Values.global.enableReplication }}
+              -defaultReplication={{ .Values.global.replicationPlacment }} \
+              {{- else }}
+              -defaultReplication={{ .Values.master.defaultReplication }} \
+              {{- end }}
+              {{- if .Values.master.volumePreallocate }}
+              -volumePreallocate \
+              {{- end }}
+              {{- if .Values.global.monitoring.enabled }}
+              -metrics.address="{{ .Values.global.monitoring.gatewayHost }}:{{ .Values.global.monitoring.gatewayPort }}" \
+              {{- end }}
+              -volumeSizeLimitMB={{ .Values.master.volumeSizeLimitMB }} \
+              {{- if .Values.master.disableHttp }}
+              -disableHttp \
+              {{- end }}
+              {{- if .Values.master.pulseSeconds }}
+              -pulseSeconds={{ .Values.master.pulseSeconds }} \
+              {{- end }}
+              {{- if .Values.master.garbageThreshold }}
+              -garbageThreshold={{ .Values.master.garbageThreshold }} \
+              {{- end }}
+              {{- if .Values.master.metricsIntervalSec }}
+              -metrics.intervalSeconds={{ .Values.master.metricsIntervalSec }} \
+              {{- end }}
+              -ip=${POD_NAME}.${SEAWEEDFS_FULLNAME}-master \
+              -peers={{ range $index := until (.Values.master.replicas | int) }}${SEAWEEDFS_FULLNAME}-master-{{ $index }}.${SEAWEEDFS_FULLNAME}-master:{{ $.Values.master.port }}{{ if lt $index (sub ($.Values.master.replicas | int) 1) }},{{ end }}{{ end }}
+          volumeMounts:
+            - name : data-{{ .Release.Namespace }}
+              mountPath: /data
+            - name: seaweedfs-master-log-volume
+              mountPath: "/logs/"
+            {{- if .Values.global.enableSecurity }}
+            - name: security-config
+              readOnly: true
+              mountPath: /etc/seaweedfs/security.toml
+              subPath: security.toml
+            - name: ca-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/ca/
+            - name: master-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/master/
+            - name: volume-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/volume/
+            - name: filer-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/filer/
+            - name: client-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/client/
+            {{- end }}
+            {{ tpl .Values.master.extraVolumeMounts . | nindent 12 | trim }}
+          ports:
+            - containerPort: {{ .Values.master.port }}
+              name: swfs-master
+            - containerPort: {{ .Values.master.grpcPort }}
+              #name: swfs-master-grpc
+          readinessProbe:
+            httpGet:
+              path: /cluster/status
+              port: {{ .Values.master.port }}
+              scheme: HTTP
+            initialDelaySeconds: 10
+            periodSeconds: 45
+            successThreshold: 2
+            failureThreshold: 100
+            timeoutSeconds: 5
+          livenessProbe:
+            httpGet:
+              path: /cluster/status
+              port: {{ .Values.master.port }}
+              scheme: HTTP
+            initialDelaySeconds: 20
+            periodSeconds: 30
+            successThreshold: 1
+            failureThreshold: 4
+            timeoutSeconds: 5
+          {{- if .Values.master.resources }}
+          resources:
+            {{ tpl .Values.master.resources . | nindent 12 | trim }}
+          {{- end }}
+      volumes:
+        - name: seaweedfs-master-log-volume
+          hostPath:
+            path: /storage/logs/seaweedfs/master
+            type: DirectoryOrCreate
+        - name: data-{{ .Release.Namespace }}
+          hostPath:
+            path: /ssd/seaweed-master/
+            type: DirectoryOrCreate
+        {{- if .Values.global.enableSecurity }}
+        - name: security-config
+          configMap:
+            name: {{ template "seaweedfs.name" . }}-security-config
+        - name: ca-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-ca-cert
+        - name: master-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-master-cert
+        - name: volume-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-volume-cert
+        - name: filer-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-filer-cert
+        - name: client-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-client-cert
+        {{- end }}
+        {{ tpl .Values.master.extraVolumes . | indent 8 | trim }}
+      {{- if .Values.master.nodeSelector }}
+      nodeSelector:
+        {{ tpl .Values.master.nodeSelector . | indent 8 | trim }}
+      {{- end }}
+{{/*  volumeClaimTemplates:*/}}
+{{/*    - metadata:*/}}
+{{/*        name: data-{{ .Release.Namespace }}*/}}
+{{/*      spec:*/}}
+{{/*        accessModes:*/}}
+{{/*          - ReadWriteOnce*/}}
+{{/*        resources:*/}}
+{{/*          requests:*/}}
+{{/*            storage: {{ .Values.master.storage }}*/}}
+{{/*        {{- if .Values.master.storageClass }}*/}}
+{{/*        storageClassName: {{ .Values.master.storageClass }}*/}}
+{{/*        {{- end }}*/}}
+{{- end }}

k8s/seaweedfs/templates/s3-deployment.yaml

@@ -0,0 +1,160 @@
+{{- if .Values.s3.enabled }}
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ template "seaweedfs.name" . }}-s3
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app: {{ template "seaweedfs.name" . }}
+    chart: {{ template "seaweedfs.chart" . }}
+    heritage: {{ .Release.Service }}
+    release: {{ .Release.Name }}
+spec:
+  serviceName: {{ template "seaweedfs.name" . }}-s3
+  replicas: {{ .Values.s3.replicas }}
+  selector:
+    matchLabels:
+      app: {{ template "seaweedfs.name" . }}
+      chart: {{ template "seaweedfs.chart" . }}
+      release: {{ .Release.Name }}
+      component: s3
+  template:
+    metadata:
+      labels:
+        app: {{ template "seaweedfs.name" . }}
+        chart: {{ template "seaweedfs.chart" . }}
+        release: {{ .Release.Name }}
+        component: s3
+    spec:
+      restartPolicy: {{ default .Values.global.restartPolicy .Values.s3.restartPolicy }}
+      {{- if .Values.s3.tolerations }}
+      tolerations:
+        {{ tpl .Values.s3.tolerations . | nindent 8 | trim }}
+      {{- end }}
+      {{- if .Values.global.imagePullSecrets }}
+      imagePullSecrets:
+        - name: {{ .Values.global.imagePullSecrets }}
+      {{- end }}
+      terminationGracePeriodSeconds: 10
+      {{- if .Values.s3.priorityClassName }}
+      priorityClassName: {{ .Values.s3.priorityClassName | quote }}
+      {{- end }}
+      enableServiceLinks: false
+      containers:
+        - name: seaweedfs
+          image: {{ template "s3.image" . }}
+          imagePullPolicy: {{ default "IfNotPresent" .Values.global.imagePullPolicy }}
+          env:
+            - name: POD_IP
+              valueFrom:
+                fieldRef:
+                  fieldPath: status.podIP
+            - name: POD_NAME
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.name
+            - name: NAMESPACE
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.namespace
+            - name: SEAWEEDFS_FULLNAME
+              value: "{{ template "seaweedfs.name" . }}"
+          command:
+            - "/bin/sh"
+            - "-ec"
+            - | 
+              exec /usr/bin/weed \
+              {{- if .Values.s3.loggingOverrideLevel }}
+              -v={{ .Values.s3.loggingOverrideLevel }} \
+              {{- else }}
+              -v={{ .Values.global.loggingLevel }} \
+              {{- end }}
+              s3 \
+              -port={{ .Values.s3.port }} \
+              {{- if .Values.global.enableSecurity }}
+              -cert.file=/usr/local/share/ca-certificates/client/tls.crt \
+              -key.file=/usr/local/share/ca-certificates/client/tls.key \
+              {{- end }}
+              {{- if .Values.s3.domainName }}
+              -domainName={{ .Values.s3.domainName }} \
+              {{- end }}
+              -filer={{ template "seaweedfs.name" . }}-filer:{{ .Values.filer.port }}
+          {{- if or (.Values.global.enableSecurity) (.Values.s3.extraVolumeMounts) }}
+          volumeMounts:
+            {{- if .Values.global.enableSecurity }}
+            - name: security-config
+              readOnly: true
+              mountPath: /etc/seaweedfs/security.toml
+              subPath: security.toml
+            - name: ca-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/ca/
+            - name: master-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/master/
+            - name: volume-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/volume/
+            - name: filer-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/filer/
+            - name: client-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/client/
+            {{- end }}
+            {{ tpl .Values.s3.extraVolumeMounts . | nindent 12 | trim }}
+          {{- end }}
+          ports:
+            - containerPort: {{ .Values.s3.port }}
+              name: swfs-s3
+          readinessProbe:
+            httpGet:
+              path: /
+              port: {{ .Values.s3.port }}
+              scheme: HTTP
+            initialDelaySeconds: 15
+            periodSeconds: 15
+            successThreshold: 1
+            failureThreshold: 100
+            timeoutSeconds: 3
+          livenessProbe:
+            httpGet:
+              path: /
+              port: {{ .Values.s3.port }}
+              scheme: HTTP
+            initialDelaySeconds: 20
+            periodSeconds: 60
+            successThreshold: 1
+            failureThreshold: 20
+            timeoutSeconds: 3
+          {{- if .Values.s3.resources }}
+          resources:
+            {{ tpl .Values.s3.resources . | nindent 12 | trim }}
+          {{- end }}
+      volumes:
+        {{- if .Values.global.enableSecurity }}
+        - name: security-config
+          configMap:
+            name: {{ template "seaweedfs.name" . }}-security-config
+        - name: ca-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-ca-cert
+        - name: master-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-master-cert
+        - name: volume-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-volume-cert
+        - name: filer-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-filer-cert
+        - name: client-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-client-cert
+        {{- end }}
+        {{ tpl .Values.s3.extraVolumes . | indent 8 | trim }}
+      {{- if .Values.s3.nodeSelector }}
+      nodeSelector:
+        {{ tpl .Values.s3.nodeSelector . | indent 8 | trim }}
+      {{- end }}
+{{- end }}

k8s/seaweedfs/templates/s3-service.yaml

@@ -0,0 +1,17 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ template "seaweedfs.name" . }}-s3
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app: {{ template "seaweedfs.name" . }}
+    component: s3
+spec:
+  ports:
+  - name: "swfs-s3"
+    port: {{ .Values.s3.port }}
+    targetPort: {{ .Values.s3.port }}
+    protocol: TCP
+  selector:
+    app: {{ template "seaweedfs.name" . }}
+    component: s3

k8s/seaweedfs/templates/secret-seaweedfs-db.yaml

@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: Secret
+type: Opaque
+metadata:
+  name: secret-seaweedfs-db
+  namespace: {{ .Release.Namespace }}
+  annotations:
+    "helm.sh/resource-policy": keep
+    "helm.sh/hook": "pre-install"
+stringData:
+  user: "YourSWUser"
+  password: "HardCodedPassword"
+  # better to random generate and create in DB
+  # password: {{ randAlphaNum 10 | sha256sum | b64enc | trunc 32 }}

k8s/seaweedfs/templates/security-configmap.yaml

@@ -0,0 +1,52 @@
+{{- if .Values.global.enableSecurity }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ template "seaweedfs.name" . }}-security-config
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app: {{ template "seaweedfs.name" . }}
+    chart: {{ template "seaweedfs.chart" . }}
+    heritage: {{ .Release.Service }}
+    release: {{ .Release.Name }}
+data:
+  security.toml: |-
+    # this file is read by master, volume server, and filer
+
+    # the jwt signing key is read by master and volume server
+    # a jwt expires in 10 seconds
+    [jwt.signing]
+    key = "{{ randAlphaNum 10 | b64enc }}"
+
+    # all grpc tls authentications are mutual
+    # the values for the following ca, cert, and key are paths to the PERM files.
+    [grpc]
+    ca = "/usr/local/share/ca-certificates/ca/tls.crt"
+
+    [grpc.volume]
+    cert = "/usr/local/share/ca-certificates/volume/tls.crt"
+    key  = "/usr/local/share/ca-certificates/volume/tls.key"
+
+    [grpc.master]
+    cert = "/usr/local/share/ca-certificates/master/tls.crt"
+    key  = "/usr/local/share/ca-certificates/master/tls.key"
+
+    [grpc.filer]
+    cert = "/usr/local/share/ca-certificates/filer/tls.crt"
+    key  = "/usr/local/share/ca-certificates/filer/tls.key"
+
+    # use this for any place needs a grpc client
+    # i.e., "weed backup|benchmark|filer.copy|filer.replicate|mount|s3|upload"
+    [grpc.client]
+    cert = "/usr/local/share/ca-certificates/client/tls.crt"
+    key  = "/usr/local/share/ca-certificates/client/tls.key"
+
+    # volume server https options
+    # Note: work in progress!
+    #     this does not work with other clients, e.g., "weed filer|mount" etc, yet.
+    [https.client]
+    enabled = false
+    [https.volume]
+    cert = ""
+    key  = ""
+{{- end }}

k8s/seaweedfs/templates/service-account.yaml

@@ -0,0 +1,29 @@
+#hack for delete pod master after migration
+---
+kind: ClusterRole
+apiVersion: rbac.authorization.k8s.io/v1beta1
+metadata:
+  name: seaweefds-rw-cr
+rules:
+  - apiGroups: [""]
+    resources: ["pods"]
+    verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: seaweefds-rw-sa
+  namespace: {{ .Release.Namespace }}
+---
+kind: ClusterRoleBinding
+apiVersion: rbac.authorization.k8s.io/v1beta1
+metadata:
+  name: system:serviceaccount:seaweefds-rw-sa:default
+subjects:
+- kind: ServiceAccount
+  name: seaweefds-rw-sa
+  namespace: {{ .Release.Namespace }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: seaweefds-rw-cr

k8s/seaweedfs/templates/volume-cert.yaml

@@ -0,0 +1,33 @@
+{{- if .Values.global.enableSecurity }}
+apiVersion: certmanager.k8s.io/v1alpha1
+kind: Certificate
+metadata:
+  name: {{ template "seaweedfs.name" . }}-volume-cert
+  namespace: {{ .Release.Namespace }}
+spec:
+  secretName: {{ template "seaweedfs.name" . }}-volume-cert
+  issuerRef:
+    name: {{ template "seaweedfs.name" . }}-clusterissuer
+    kind: ClusterIssuer
+  commonName: {{ .Values.certificates.commonName }}
+  organization:
+    - "SeaweedFS CA"
+  dnsNames:
+    - '*.{{ .Release.Namespace }}'
+    - '*.{{ .Release.Namespace }}.svc'
+    - '*.{{ .Release.Namespace }}.svc.cluster.local'
+    - '*.{{ template "seaweedfs.name" . }}-master'
+    - '*.{{ template "seaweedfs.name" . }}-master.{{ .Release.Namespace }}'
+    - '*.{{ template "seaweedfs.name" . }}-master.{{ .Release.Namespace }}.svc'
+    - '*.{{ template "seaweedfs.name" . }}-master.{{ .Release.Namespace }}.svc.cluster.local'
+{{- if .Values.certificates.ipAddresses }}
+  ipAddresses:
+    {{- range .Values.certificates.ipAddresses }}
+    - {{ . }}
+    {{- end }}
+{{- end }}
+  keyAlgorithm: {{ .Values.certificates.keyAlgorithm }}
+  keySize: {{ .Values.certificates.keySize }}
+  duration: {{ .Values.certificates.duration }}
+  renewBefore: {{ .Values.certificates.renewBefore }}
+{{- end }}

k8s/seaweedfs/templates/volume-service.yaml

@@ -0,0 +1,22 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ template "seaweedfs.name" . }}-volume
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app: {{ template "seaweedfs.name" . }}
+    component: volume
+spec:
+  clusterIP: None
+  ports:
+  - name: "swfs-volume"
+    port: {{ .Values.volume.port }}
+    targetPort: {{ .Values.volume.port }}
+    protocol: TCP
+  - name: "swfs-volume-18080"
+    port: {{ .Values.volume.grpcPort }}
+    targetPort: {{ .Values.volume.grpcPort }}
+    protocol: TCP
+  selector:
+    app: {{ template "seaweedfs.name" . }}
+    component: volume

k8s/seaweedfs/templates/volume-statefulset.yaml

@@ -0,0 +1,200 @@
+{{- if .Values.volume.enabled }}
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: {{ template "seaweedfs.name" . }}-volume
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app: {{ template "seaweedfs.name" . }}
+    chart: {{ template "seaweedfs.chart" . }}
+    heritage: {{ .Release.Service }}
+    release: {{ .Release.Name }}
+spec:
+  serviceName: {{ template "seaweedfs.name" . }}-volume
+  replicas: {{ .Values.volume.replicas }}
+  podManagementPolicy: Parallel
+  selector:
+    matchLabels:
+      app: {{ template "seaweedfs.name" . }}
+      chart: {{ template "seaweedfs.chart" . }}
+      release: {{ .Release.Name }}
+      component: volume
+  template:
+    metadata:
+      labels:
+        app: {{ template "seaweedfs.name" . }}
+        chart: {{ template "seaweedfs.chart" . }}
+        release: {{ .Release.Name }}
+        component: volume
+    spec:
+      {{- if .Values.volume.affinity }}
+      affinity:
+        {{ tpl .Values.volume.affinity . | nindent 8 | trim }}
+      {{- end }}
+      restartPolicy: {{ default .Values.global.restartPolicy .Values.volume.restartPolicy }}
+      {{- if .Values.volume.tolerations }}
+      tolerations:
+      {{ tpl .Values.volume.tolerations . | nindent 8 | trim }}
+      {{- end }}
+      {{- if .Values.global.imagePullSecrets }}
+      imagePullSecrets:
+        - name: {{ .Values.global.imagePullSecrets }}
+      {{- end }}
+      terminationGracePeriodSeconds: 10
+      {{- if .Values.volume.priorityClassName }}
+      priorityClassName: {{ .Values.volume.priorityClassName | quote }}
+      {{- end }}
+      enableServiceLinks: false
+      containers:
+        - name: seaweedfs
+          image: {{ template "volume.image" . }}
+          imagePullPolicy: {{ default "IfNotPresent" .Values.global.imagePullPolicy }}
+          env:
+            - name: POD_NAME
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.name
+            - name: NAMESPACE
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.namespace
+            - name: HOST_IP
+              valueFrom:
+                fieldRef:
+                  fieldPath: status.hostIP
+            - name: SEAWEEDFS_FULLNAME
+              value: "{{ template "seaweedfs.name" . }}"
+          command:
+            - "/bin/sh"
+            - "-ec"
+            - |
+              exec /usr/bin/weed -logdir=/logs \
+                {{- if .Values.volume.loggingOverrideLevel }}
+                -v={{ .Values.volume.loggingOverrideLevel }} \
+                {{- else }}
+                -v={{ .Values.global.loggingLevel }} \
+                {{- end }}
+                volume \
+                -port={{ .Values.volume.port }} \
+                -dir={{ .Values.volume.dir }} \
+                -max={{ .Values.volume.maxVolumes }} \
+                {{- if .Values.volume.rack }}
+                -rack={{ .Values.volume.rack }} \
+                {{- end }}
+                {{- if .Values.volume.dataCenter }}
+                -dataCenter={{ .Values.volume.dataCenter }} \
+                {{- end }}
+                -ip.bind={{ .Values.volume.ipBind }} \
+                -read.redirect={{ .Values.volume.readRedirect }} \
+                {{- if .Values.volume.whiteList }}
+                -whiteList={{ .Values.volume.whiteList }} \
+                {{- end }}
+                {{- if .Values.volume.imagesFixOrientation }}
+                -images.fix.orientation \
+                {{- end }}
+                {{- if .Values.volume.pulseSeconds }}
+                -pulseSeconds={{ .Values.volume.pulseSeconds }} \
+                {{- end }}
+                {{- if .Values.volume.index }}
+                -index={{ .Values.volume.index }} \
+                {{- end }}
+                {{- if .Values.volume.fileSizeLimitMB }}
+                -fileSizeLimitMB={{ .Values.volume.fileSizeLimitMB }} \
+                {{- end }}
+                -minFreeSpacePercent={{ .Values.volume.minFreeSpacePercent }} \
+                -ip=${POD_NAME}.${SEAWEEDFS_FULLNAME}-volume \
+                -compactionMBps={{ .Values.volume.compactionMBps }} \
+                -mserver={{ range $index := until (.Values.master.replicas | int) }}${SEAWEEDFS_FULLNAME}-master-{{ $index }}.${SEAWEEDFS_FULLNAME}-master:{{ $.Values.master.port }}{{ if lt $index (sub ($.Values.master.replicas | int) 1) }},{{ end }}{{ end }}
+          volumeMounts:
+            - name: seaweedfs-volume-storage
+              mountPath: "/data/"
+            - name: seaweedfs-volume-log-volume
+              mountPath: "/logs/"
+            {{- if .Values.global.enableSecurity }}
+            - name: security-config
+              readOnly: true
+              mountPath: /etc/seaweedfs/security.toml
+              subPath: security.toml
+            - name: ca-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/ca/
+            - name: master-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/master/
+            - name: volume-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/volume/
+            - name: filer-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/filer/
+            - name: client-cert
+              readOnly: true
+              mountPath: /usr/local/share/ca-certificates/client/
+            {{- end }}
+            {{ tpl .Values.volume.extraVolumeMounts . | nindent 12 | trim }}
+          ports:
+            - containerPort: {{ .Values.volume.port }}
+              name: swfs-vol
+            - containerPort: {{ .Values.volume.grpcPort }}
+              #name: swfs-vol-grpc
+          readinessProbe:
+            httpGet:
+              path: /status
+              port: {{ .Values.volume.port }}
+              scheme: HTTP
+            initialDelaySeconds: 15
+            periodSeconds: 90
+            successThreshold: 1
+            failureThreshold: 100
+            timeoutSeconds: 5
+          livenessProbe:
+            httpGet:
+              path: /status
+              port: {{ .Values.volume.port }}
+              scheme: HTTP
+            initialDelaySeconds: 20
+            periodSeconds: 90
+            successThreshold: 1
+            failureThreshold: 4
+            timeoutSeconds: 5
+          {{- if .Values.volume.resources }}
+          resources:
+            {{ tpl .Values.volume.resources . | nindent 12 | trim }}
+          {{- end }}
+      volumes:
+        - name: seaweedfs-volume-log-volume
+          hostPath:
+            path: /storage/logs/seaweedfs/volume
+            type: DirectoryOrCreate
+        - name: seaweedfs-volume-storage
+          hostPath:
+            path: /storage/object_store/
+            type: DirectoryOrCreate
+        {{- if .Values.global.enableSecurity }}
+        - name: security-config
+          configMap:
+            name: {{ template "seaweedfs.name" . }}-security-config
+        - name: ca-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-ca-cert
+        - name: master-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-master-cert
+        - name: volume-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-volume-cert
+        - name: filer-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-filer-cert
+        - name: client-cert
+          secret:
+            secretName: {{ template "seaweedfs.name" . }}-client-cert
+        {{- end }}
+      {{- if .Values.volume.extraVolumes }}
+        {{ tpl .Values.volume.extraVolumes . | indent 8 | trim }}
+      {{- end }}
+      {{- if .Values.volume.nodeSelector }}
+      nodeSelector:
+        {{ tpl .Values.volume.nodeSelector . | indent 8 | trim }}
+      {{- end }}
+{{- end }}

k8s/seaweedfs/values.yaml

@@ -0,0 +1,353 @@
+# Available parameters and their default values for the SeaweedFS chart.
+
+global:
+  registry: ""
+  repository: ""
+  imageName: chrislusf/seaweedfs
+  imageTag: "2.02"
+  imagePullPolicy: IfNotPresent
+  imagePullSecrets: imagepullsecret
+  restartPolicy: Always
+  loggingLevel: 1
+  enableSecurity: false
+  monitoring:
+    enabled: false
+    gatewayHost: null
+    gatewayPort: null
+  # if enabled will use global.replicationPlacment and override master & filer defaultReplicaPlacement config
+  enableReplication: false
+  #  replication type is XYZ:
+  # X number of replica in other data centers
+  # Y number of replica in other racks in the same data center
+  # Z number of replica in other servers in the same rack
+  replicationPlacment: "001"
+
+image:
+  registry: ""
+  repository: ""
+
+master:
+  enabled: true
+  repository: null
+  imageName: null
+  imageTag: null
+  imageOverride: null
+  restartPolicy: null
+  replicas: 1
+  port: 9333
+  grpcPort: 19333
+  ipBind: "0.0.0.0"
+  volumePreallocate: false
+  #Master stops directing writes to oversized volumes
+  volumeSizeLimitMB: 30000
+  loggingOverrideLevel: null
+  #number of seconds between heartbeats, default 5
+  pulseSeconds: null
+  #threshold to vacuum and reclaim spaces, default 0.3 (30%)
+  garbageThreshold: null
+  #Prometheus push interval in seconds, default 15
+  metricsIntervalSec: 15
+  #  replication type is XYZ:
+  # X number of replica in other data centers
+  # Y number of replica in other racks in the same data center
+  # Z number of replica in other servers in the same rack
+  defaultReplication: "000"
+
+  # Disable http request, only gRpc operations are allowed
+  disableHttp: false
+
+  extraVolumes: ""
+  extraVolumeMounts: ""
+
+  # storage and storageClass are the settings for configuring stateful
+  # storage for the master pods. storage should be set to the disk size of
+  # the attached volume. storageClass is the class of storage which defaults
+  # to null (the Kube cluster will pick the default).
+  storage: 25Gi
+  storageClass: null
+
+  # Resource requests, limits, etc. for the master cluster placement. This
+  # should map directly to the value of the resources field for a PodSpec,
+  # formatted as a multi-line string. By default no direct resource request
+  # is made.
+  resources: null
+
+  # updatePartition is used to control a careful rolling update of SeaweedFS
+  # masters.
+  updatePartition: 0
+
+  # Affinity Settings
+  # Commenting out or setting as empty the affinity variable, will allow
+  # deployment to single node services such as Minikube
+  affinity: |
+    podAntiAffinity:
+      requiredDuringSchedulingIgnoredDuringExecution:
+        - labelSelector:
+            matchLabels:
+              app: {{ template "seaweedfs.name" . }}
+              release: "{{ .Release.Name }}"
+              component: master
+          topologyKey: kubernetes.io/hostname
+
+  # Toleration Settings for master pods
+  # This should be a multi-line string matching the Toleration array
+  # in a PodSpec.
+  tolerations: ""
+
+  # nodeSelector labels for master pod assignment, formatted as a muli-line string.
+  # ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#nodeselector
+  # Example:
+  # nodeSelector: |
+  #   beta.kubernetes.io/arch: amd64
+  nodeSelector: |
+    sw-backend: "true"
+
+  # used to assign priority to master pods
+  # ref: https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/
+  priorityClassName: ""
+
+  extraEnvironmentVars:
+    WEED_MASTER_VOLUME_GROWTH_COPY_1: 7
+    WEED_MASTER_VOLUME_GROWTH_COPY_2: 6
+    WEED_MASTER_VOLUME_GROWTH_COPY_3: 3
+    WEED_MASTER_VOLUME_GROWTH_COPY_OTHER: 1
+
+volume:
+  enabled: true
+  repository: null
+  imageName: null
+  imageTag: null
+  imageOverride: null
+  restartPolicy: null
+  port: 8080
+  grpcPort: 18080
+  ipBind: "0.0.0.0"
+  replicas: 1
+  loggingOverrideLevel: null
+  # number of seconds between heartbeats, must be smaller than or equal to the master's setting
+  pulseSeconds: null
+  # Choose [memory|leveldb|leveldbMedium|leveldbLarge] mode for memory~performance balance., default memory
+  index: null
+  # limit file size to avoid out of memory, default 256mb
+  fileSizeLimitMB: null
+  # minimum free disk space(in percents). If free disk space lower this value - all volumes marks as ReadOnly
+  minFreeSpacePercent: 1
+
+
+  # limit background compaction or copying speed in mega bytes per second
+  compactionMBps: "50"
+
+  # Directories to store data files. dir[,dir]... (default "/tmp")
+  dir: "/data"
+
+  # Maximum numbers of volumes, count[,count]...
+  # If set to zero on non-windows OS, the limit will be auto configured. (default "7")
+  maxVolumes: "0"
+
+  # Volume server's rack name
+  rack: null
+
+  # Volume server's data center name
+  dataCenter: null
+
+  # Redirect moved or non-local volumes. (default true)
+  readRedirect: true
+
+  # Comma separated Ip addresses having write permission. No limit if empty.
+  whiteList: null
+
+  # Adjust jpg orientation when uploading.
+  imagesFixOrientation: false
+
+  extraVolumes: ""
+  extraVolumeMounts: ""
+
+  # Affinity Settings
+  # Commenting out or setting as empty the affinity variable, will allow
+  # deployment to single node services such as Minikube
+  affinity: |
+    podAntiAffinity:
+      requiredDuringSchedulingIgnoredDuringExecution:
+        - labelSelector:
+            matchLabels:
+              app: {{ template "seaweedfs.name" . }}
+              release: "{{ .Release.Name }}"
+              component: volume
+          topologyKey: kubernetes.io/hostname
+
+  # Resource requests, limits, etc. for the server cluster placement. This
+  # should map directly to the value of the resources field for a PodSpec,
+  # formatted as a multi-line string. By default no direct resource request
+  # is made.
+  resources: null
+
+  # Toleration Settings for server pods
+  # This should be a multi-line string matching the Toleration array
+  # in a PodSpec.
+  tolerations: ""
+
+  # nodeSelector labels for server pod assignment, formatted as a muli-line string.
+  # ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#nodeselector
+  # Example:
+  # nodeSelector: |
+  #   beta.kubernetes.io/arch: amd64
+  nodeSelector: |
+    sw-volume: "true"
+
+  # used to assign priority to server pods
+  # ref: https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/
+  priorityClassName: ""
+
+
+filer:
+  enabled: true
+  repository: null
+  imageName: null
+  imageTag: null
+  imageOverride: null
+  restartPolicy: null
+  replicas: 1
+  port: 8888
+  grpcPort: 18888
+  loggingOverrideLevel: null
+  #  replication type is XYZ:
+  # X number of replica in other data centers
+  # Y number of replica in other racks in the same data center
+  # Z number of replica in other servers in the same rack
+  defaultReplicaPlacement: "000"
+  # turn off directory listing
+  disableDirListing: false
+  # split files larger than the limit, default 32
+  maxMB: null
+  # encrypt data on volume servers
+  encryptVolumeData: false
+
+  # Whether proxy or redirect to volume server during file GET request
+  redirectOnRead: false
+
+  # Limit sub dir listing size (default 100000)
+  dirListLimit: 100000
+
+  # Turn off directory listing
+  disableDirListing: false
+
+  # Disable http request, only gRpc operations are allowed
+  disableHttp: false
+
+  # storage and storageClass are the settings for configuring stateful
+  # storage for the master pods. storage should be set to the disk size of
+  # the attached volume. storageClass is the class of storage which defaults
+  # to null (the Kube cluster will pick the default).
+  storage: 25Gi
+  storageClass: null
+
+  extraVolumes: ""
+  extraVolumeMounts: ""
+
+  # Affinity Settings
+  # Commenting out or setting as empty the affinity variable, will allow
+  # deployment to single node services such as Minikube
+  affinity: |
+    podAntiAffinity:
+      requiredDuringSchedulingIgnoredDuringExecution:
+        - labelSelector:
+            matchLabels:
+              app: {{ template "seaweedfs.name" . }}
+              release: "{{ .Release.Name }}"
+              component: filer
+          topologyKey: kubernetes.io/hostname
+
+  # updatePartition is used to control a careful rolling update of SeaweedFS
+  # masters.
+  updatePartition: 0
+
+  # Resource requests, limits, etc. for the server cluster placement. This
+  # should map directly to the value of the resources field for a PodSpec,
+  # formatted as a multi-line string. By default no direct resource request
+  # is made.
+  resources: null
+
+  # Toleration Settings for server pods
+  # This should be a multi-line string matching the Toleration array
+  # in a PodSpec.
+  tolerations: ""
+
+  # nodeSelector labels for server pod assignment, formatted as a muli-line string.
+  # ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#nodeselector
+  # Example:
+  # nodeSelector: |
+  #   beta.kubernetes.io/arch: amd64
+  nodeSelector: |
+    sw-backend: "true"
+
+  # used to assign priority to server pods
+  # ref: https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/
+  priorityClassName: ""
+
+  # extraEnvVars is a list of extra enviroment variables to set with the stateful set.
+  extraEnvironmentVars:
+    WEED_MYSQL_ENABLED: "true"
+    WEED_MYSQL_HOSTNAME: "mysql-db-host"
+    WEED_MYSQL_PORT: "3306"
+    WEED_MYSQL_DATABASE: "sw_database"
+    WEED_MYSQL_CONNECTION_MAX_IDLE: "10"
+    WEED_MYSQL_CONNECTION_MAX_OPEN: "150"
+    # enable usage of memsql as filer backend
+    WEED_MYSQL_INTERPOLATEPARAMS: "true"
+    WEED_LEVELDB2_ENABLED: "false"
+    # with http DELETE, by default the filer would check whether a folder is empty.
+    # recursive_delete will delete all sub folders and files, similar to "rm -Rf"
+    WEED_FILER_OPTIONS_RECURSIVE_DELETE: "false"
+    # directories under this folder will be automatically creating a separate bucket
+    WEED_FILER_BUCKETS_FOLDER: "/buckets"
+    # directories under this folder will be store message queue data
+    WEED_FILER_QUEUES_FOLDER: "/queues"
+    # WEED_FILER_OPTIONS_BUCKETS_FSYNC a list of buckets names with all write requests fsync=true
+    WEED_FILER_OPTIONS_BUCKETS_FSYNC: []
+
+s3:
+  enabled: true
+  repository: null
+  imageName: null
+  imageTag: null
+  restartPolicy: null
+  replicas: 1
+  port: 8333
+  loggingOverrideLevel: null
+
+  # Suffix of the host name, {bucket}.{domainName}
+  domainName: ""
+
+  extraVolumes: ""
+  extraVolumeMounts: ""
+
+  # Resource requests, limits, etc. for the server cluster placement. This
+  # should map directly to the value of the resources field for a PodSpec,
+  # formatted as a multi-line string. By default no direct resource request
+  # is made.
+  resources: null
+
+  # Toleration Settings for server pods
+  # This should be a multi-line string matching the Toleration array
+  # in a PodSpec.
+  tolerations: ""
+
+  # nodeSelector labels for server pod assignment, formatted as a muli-line string.
+  # ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#nodeselector
+  # Example:
+  # nodeSelector: |
+  #   beta.kubernetes.io/arch: amd64
+  nodeSelector: |
+    sw-backend: "true"
+
+  # used to assign priority to server pods
+  # ref: https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/
+  priorityClassName: ""
+
+certificates:
+  commonName: "SeaweedFS CA"
+  ipAddresses: []
+  keyAlgorithm: rsa
+  keySize: 2048
+  duration: 2160h # 90d
+  renewBefore: 360h # 15d

other/java/client/pom.xml

@@ -1,10 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
     <groupId>com.github.chrislusf</groupId>
     <artifactId>seaweedfs-client</artifactId>
-    <version>1.2.4</version>
+    <version>1.4.8</version>
 
     <parent>
         <groupId>org.sonatype.oss</groupId>
@@ -88,8 +89,8 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>7</source>
-                    <target>7</target>
+                    <source>8</source>
+                    <target>8</target>
                 </configuration>
             </plugin>
             <plugin>
@@ -97,9 +98,11 @@
                 <artifactId>protobuf-maven-plugin</artifactId>
                 <version>0.6.1</version>
                 <configuration>
-                    <protocArtifact>com.google.protobuf:protoc:${protobuf.version}:exe:${os.detected.classifier}</protocArtifact>
+                    <protocArtifact>com.google.protobuf:protoc:${protobuf.version}:exe:${os.detected.classifier}
+                    </protocArtifact>
                     <pluginId>grpc-java</pluginId>
-                    <pluginArtifact>io.grpc:protoc-gen-grpc-java:${grpc.version}:exe:${os.detected.classifier}</pluginArtifact>
+                    <pluginArtifact>io.grpc:protoc-gen-grpc-java:${grpc.version}:exe:${os.detected.classifier}
+                    </pluginArtifact>
                 </configuration>
                 <executions>
                     <execution>

other/java/client/pom.xml.deploy

@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.github.chrislusf</groupId>
+    <artifactId>seaweedfs-client</artifactId>
+    <version>1.4.8</version>
+
+    <parent>
+        <groupId>org.sonatype.oss</groupId>
+        <artifactId>oss-parent</artifactId>
+        <version>9</version>
+    </parent>
+
+    <properties>
+        <protobuf.version>3.9.1</protobuf.version>
+        <!-- follow https://github.com/grpc/grpc-java -->
+        <grpc.version>1.23.0</grpc.version>
+        <guava.version>28.0-jre</guava.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.moandjiezana.toml</groupId>
+            <artifactId>toml4j</artifactId>
+            <version>0.7.2</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/com.google.protobuf/protobuf-java -->
+        <dependency>
+            <groupId>com.google.protobuf</groupId>
+            <artifactId>protobuf-java</artifactId>
+            <version>${protobuf.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-netty-shaded</artifactId>
+            <version>${grpc.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-protobuf</artifactId>
+            <version>${grpc.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-stub</artifactId>
+            <version>${grpc.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>1.7.25</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.httpcomponents</groupId>
+            <artifactId>httpmime</artifactId>
+            <version>4.5.6</version>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <distributionManagement>
+        <snapshotRepository>
+            <id>ossrh</id>
+            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+        </snapshotRepository>
+    </distributionManagement>
+    <build>
+        <extensions>
+            <extension>
+                <groupId>kr.motd.maven</groupId>
+                <artifactId>os-maven-plugin</artifactId>
+                <version>1.6.2</version>
+            </extension>
+        </extensions>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>8</source>
+                    <target>8</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.xolstice.maven.plugins</groupId>
+                <artifactId>protobuf-maven-plugin</artifactId>
+                <version>0.6.1</version>
+                <configuration>
+                    <protocArtifact>com.google.protobuf:protoc:${protobuf.version}:exe:${os.detected.classifier}
+                    </protocArtifact>
+                    <pluginId>grpc-java</pluginId>
+                    <pluginArtifact>io.grpc:protoc-gen-grpc-java:${grpc.version}:exe:${os.detected.classifier}
+                    </pluginArtifact>
+                </configuration>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>compile</goal>
+                            <goal>compile-custom</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-gpg-plugin</artifactId>
+                <version>1.5</version>
+                <executions>
+                    <execution>
+                        <id>sign-artifacts</id>
+                        <phase>verify</phase>
+                        <goals>
+                            <goal>sign</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.sonatype.plugins</groupId>
+                <artifactId>nexus-staging-maven-plugin</artifactId>
+                <version>1.6.7</version>
+                <extensions>true</extensions>
+                <configuration>
+                    <serverId>ossrh</serverId>
+                    <nexusUrl>https://oss.sonatype.org/</nexusUrl>
+                    <autoReleaseAfterClose>true</autoReleaseAfterClose>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-source-plugin</artifactId>
+                <version>2.2.1</version>
+                <executions>
+                    <execution>
+                        <id>attach-sources</id>
+                        <goals>
+                            <goal>jar-no-fork</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <version>2.9.1</version>
+                <executions>
+                    <execution>
+                        <id>attach-javadocs</id>
+                        <goals>
+                            <goal>jar</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

other/java/client/pom_debug.xml

@@ -0,0 +1,139 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.github.chrislusf</groupId>
+    <artifactId>seaweedfs-client</artifactId>
+    <version>1.4.8</version>
+
+    <parent>
+        <groupId>org.sonatype.oss</groupId>
+        <artifactId>oss-parent</artifactId>
+        <version>9</version>
+    </parent>
+
+    <properties>
+        <protobuf.version>3.9.1</protobuf.version>
+        <!-- follow https://github.com/grpc/grpc-java -->
+        <grpc.version>1.23.0</grpc.version>
+        <guava.version>28.0-jre</guava.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.moandjiezana.toml</groupId>
+            <artifactId>toml4j</artifactId>
+            <version>0.7.2</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/com.google.protobuf/protobuf-java -->
+        <dependency>
+            <groupId>com.google.protobuf</groupId>
+            <artifactId>protobuf-java</artifactId>
+            <version>${protobuf.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-netty-shaded</artifactId>
+            <version>${grpc.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-protobuf</artifactId>
+            <version>${grpc.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-stub</artifactId>
+            <version>${grpc.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>1.7.25</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.httpcomponents</groupId>
+            <artifactId>httpmime</artifactId>
+            <version>4.5.6</version>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <extensions>
+            <extension>
+                <groupId>kr.motd.maven</groupId>
+                <artifactId>os-maven-plugin</artifactId>
+                <version>1.6.2</version>
+            </extension>
+        </extensions>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>8</source>
+                    <target>8</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.xolstice.maven.plugins</groupId>
+                <artifactId>protobuf-maven-plugin</artifactId>
+                <version>0.6.1</version>
+                <configuration>
+                    <protocArtifact>com.google.protobuf:protoc:${protobuf.version}:exe:${os.detected.classifier}
+                    </protocArtifact>
+                    <pluginId>grpc-java</pluginId>
+                    <pluginArtifact>io.grpc:protoc-gen-grpc-java:${grpc.version}:exe:${os.detected.classifier}
+                    </pluginArtifact>
+                </configuration>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>compile</goal>
+                            <goal>compile-custom</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-source-plugin</artifactId>
+                <version>2.2.1</version>
+                <executions>
+                    <execution>
+                        <id>attach-sources</id>
+                        <goals>
+                            <goal>jar-no-fork</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <version>2.9.1</version>
+                <executions>
+                    <execution>
+                        <id>attach-javadocs</id>
+                        <goals>
+                            <goal>jar</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

other/java/client/src/main/java/seaweedfs/client/ByteBufferPool.java

@@ -0,0 +1,41 @@
+package seaweedfs.client;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.List;
+
+public class ByteBufferPool {
+
+    private static final int MIN_BUFFER_SIZE = 8 * 1024 * 1024;
+    private static final Logger LOG = LoggerFactory.getLogger(ByteBufferPool.class);
+
+    private static final List<ByteBuffer> bufferList = new ArrayList<>();
+
+    public static synchronized ByteBuffer request(int bufferSize) {
+        if (bufferSize < MIN_BUFFER_SIZE) {
+            bufferSize = MIN_BUFFER_SIZE;
+        }
+        LOG.debug("requested new buffer {}", bufferSize);
+        if (bufferList.isEmpty()) {
+            return ByteBuffer.allocate(bufferSize);
+        }
+        ByteBuffer buffer = bufferList.remove(bufferList.size() - 1);
+        if (buffer.capacity() >= bufferSize) {
+            return buffer;
+        }
+
+        LOG.info("add new buffer from {} to {}", buffer.capacity(), bufferSize);
+        bufferList.add(0, buffer);
+        return ByteBuffer.allocate(bufferSize);
+
+    }
+
+    public static synchronized void release(ByteBuffer obj) {
+        obj.clear();
+        bufferList.add(0, obj);
+    }
+
+}

other/java/client/src/main/java/seaweedfs/client/ChunkCache.java

@@ -0,0 +1,37 @@
+package seaweedfs.client;
+
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+
+import java.util.concurrent.TimeUnit;
+
+public class ChunkCache {
+
+    private Cache<String, byte[]> cache = null;
+
+    public ChunkCache(int maxEntries) {
+        if (maxEntries == 0) {
+            return;
+        }
+        this.cache = CacheBuilder.newBuilder()
+                .maximumSize(maxEntries)
+                .weakValues()
+                .expireAfterAccess(1, TimeUnit.HOURS)
+                .build();
+    }
+
+    public byte[] getChunk(String fileId) {
+        if (this.cache == null) {
+            return null;
+        }
+        return this.cache.getIfPresent(fileId);
+    }
+
+    public void setChunk(String fileId, byte[] data) {
+        if (this.cache == null) {
+            return;
+        }
+        this.cache.put(fileId, data);
+    }
+
+}

other/java/client/src/main/java/seaweedfs/client/FileChunkManifest.java

@@ -0,0 +1,140 @@
+package seaweedfs.client;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+public class FileChunkManifest {
+
+    private static final Logger LOG = LoggerFactory.getLogger(FileChunkManifest.class);
+
+    private static final int mergeFactor = 1000;
+
+    public static boolean hasChunkManifest(List<FilerProto.FileChunk> chunks) {
+        for (FilerProto.FileChunk chunk : chunks) {
+            if (chunk.getIsChunkManifest()) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public static List<FilerProto.FileChunk> resolveChunkManifest(
+            final FilerGrpcClient filerGrpcClient, List<FilerProto.FileChunk> chunks) throws IOException {
+
+        List<FilerProto.FileChunk> dataChunks = new ArrayList<>();
+
+        for (FilerProto.FileChunk chunk : chunks) {
+            if (!chunk.getIsChunkManifest()) {
+                dataChunks.add(chunk);
+                continue;
+            }
+
+            // IsChunkManifest
+            LOG.debug("fetching chunk manifest:{}", chunk);
+            byte[] data = fetchChunk(filerGrpcClient, chunk);
+            FilerProto.FileChunkManifest m = FilerProto.FileChunkManifest.newBuilder().mergeFrom(data).build();
+            List<FilerProto.FileChunk> resolvedChunks = new ArrayList<>();
+            for (FilerProto.FileChunk t : m.getChunksList()) {
+                // avoid deprecated chunk.getFileId()
+                resolvedChunks.add(t.toBuilder().setFileId(FilerClient.toFileId(t.getFid())).build());
+            }
+            dataChunks.addAll(resolveChunkManifest(filerGrpcClient, resolvedChunks));
+        }
+
+        return dataChunks;
+    }
+
+    private static byte[] fetchChunk(final FilerGrpcClient filerGrpcClient, FilerProto.FileChunk chunk) throws IOException {
+
+        String vid = "" + chunk.getFid().getVolumeId();
+        FilerProto.Locations locations = filerGrpcClient.vidLocations.get(vid);
+        if (locations == null) {
+            FilerProto.LookupVolumeRequest.Builder lookupRequest = FilerProto.LookupVolumeRequest.newBuilder();
+            lookupRequest.addVolumeIds(vid);
+            FilerProto.LookupVolumeResponse lookupResponse = filerGrpcClient
+                    .getBlockingStub().lookupVolume(lookupRequest.build());
+            locations = lookupResponse.getLocationsMapMap().get(vid);
+            filerGrpcClient.vidLocations.put(vid, locations);
+            LOG.debug("fetchChunk vid:{} locations:{}", vid, locations);
+        }
+
+        SeaweedRead.ChunkView chunkView = new SeaweedRead.ChunkView(
+                FilerClient.toFileId(chunk.getFid()), // avoid deprecated chunk.getFileId()
+                0,
+                -1,
+                0,
+                true,
+                chunk.getCipherKey().toByteArray(),
+                chunk.getIsCompressed());
+
+        byte[] chunkData = SeaweedRead.chunkCache.getChunk(chunkView.fileId);
+        if (chunkData == null) {
+            LOG.debug("doFetchFullChunkData:{}", chunkView);
+            chunkData = SeaweedRead.doFetchFullChunkData(chunkView, locations);
+        }
+        if (chunk.getIsChunkManifest()){
+            LOG.debug("chunk {} size {}", chunkView.fileId, chunkData.length);
+            SeaweedRead.chunkCache.setChunk(chunkView.fileId, chunkData);
+        }
+
+        return chunkData;
+
+    }
+
+    public static List<FilerProto.FileChunk> maybeManifestize(
+            final FilerGrpcClient filerGrpcClient, List<FilerProto.FileChunk> inputChunks) throws IOException {
+        // the return variable
+        List<FilerProto.FileChunk> chunks = new ArrayList<>();
+
+        List<FilerProto.FileChunk> dataChunks = new ArrayList<>();
+        for (FilerProto.FileChunk chunk : inputChunks) {
+            if (!chunk.getIsChunkManifest()) {
+                dataChunks.add(chunk);
+            } else {
+                chunks.add(chunk);
+            }
+        }
+
+        int remaining = dataChunks.size();
+        for (int i = 0; i + mergeFactor < dataChunks.size(); i += mergeFactor) {
+            FilerProto.FileChunk chunk = mergeIntoManifest(filerGrpcClient, dataChunks.subList(i, i + mergeFactor));
+            chunks.add(chunk);
+            remaining -= mergeFactor;
+        }
+
+        // remaining
+        for (int i = dataChunks.size() - remaining; i < dataChunks.size(); i++) {
+            chunks.add(dataChunks.get(i));
+        }
+        return chunks;
+    }
+
+    private static FilerProto.FileChunk mergeIntoManifest(final FilerGrpcClient filerGrpcClient, List<FilerProto.FileChunk> dataChunks) throws IOException {
+        // create and serialize the manifest
+        dataChunks = FilerClient.beforeEntrySerialization(dataChunks);
+        FilerProto.FileChunkManifest.Builder m = FilerProto.FileChunkManifest.newBuilder().addAllChunks(dataChunks);
+        byte[] data = m.build().toByteArray();
+
+        long minOffset = Long.MAX_VALUE;
+        long maxOffset = -1;
+        for (FilerProto.FileChunk chunk : dataChunks) {
+            minOffset = Math.min(minOffset, chunk.getOffset());
+            maxOffset = Math.max(maxOffset, chunk.getSize() + chunk.getOffset());
+        }
+
+        FilerProto.FileChunk.Builder manifestChunk = SeaweedWrite.writeChunk(
+                filerGrpcClient.getReplication(),
+                filerGrpcClient,
+                minOffset,
+                data, 0, data.length);
+        manifestChunk.setIsChunkManifest(true);
+        manifestChunk.setSize(maxOffset - minOffset);
+        return manifestChunk.build();
+
+    }
+
+}

other/java/client/src/main/java/seaweedfs/client/FilerClient.java

@@ -14,7 +14,7 @@ public class FilerClient {
 
     private static final Logger LOG = LoggerFactory.getLogger(FilerClient.class);
 
-    private FilerGrpcClient filerGrpcClient;
+    private final FilerGrpcClient filerGrpcClient;
 
     public FilerClient(String host, int grpcPort) {
         filerGrpcClient = new FilerGrpcClient(host, grpcPort);
@@ -24,6 +24,67 @@ public class FilerClient {
         this.filerGrpcClient = filerGrpcClient;
     }
 
+    public static String toFileId(FilerProto.FileId fid) {
+        if (fid == null) {
+            return null;
+        }
+        return String.format("%d,%x%08x", fid.getVolumeId(), fid.getFileKey(), fid.getCookie());
+    }
+
+    public static FilerProto.FileId toFileIdObject(String fileIdStr) {
+        if (fileIdStr == null || fileIdStr.length() == 0) {
+            return null;
+        }
+        int commaIndex = fileIdStr.lastIndexOf(',');
+        String volumeIdStr = fileIdStr.substring(0, commaIndex);
+        String fileKeyStr = fileIdStr.substring(commaIndex + 1, fileIdStr.length() - 8);
+        String cookieStr = fileIdStr.substring(fileIdStr.length() - 8);
+
+        return FilerProto.FileId.newBuilder()
+                .setVolumeId(Integer.parseInt(volumeIdStr))
+                .setFileKey(Long.parseLong(fileKeyStr, 16))
+                .setCookie((int) Long.parseLong(cookieStr, 16))
+                .build();
+    }
+
+    public static List<FilerProto.FileChunk> beforeEntrySerialization(List<FilerProto.FileChunk> chunks) {
+        List<FilerProto.FileChunk> cleanedChunks = new ArrayList<>();
+        for (FilerProto.FileChunk chunk : chunks) {
+            FilerProto.FileChunk.Builder chunkBuilder = chunk.toBuilder();
+            chunkBuilder.clearFileId();
+            chunkBuilder.clearSourceFileId();
+            chunkBuilder.setFid(toFileIdObject(chunk.getFileId()));
+            FilerProto.FileId sourceFid = toFileIdObject(chunk.getSourceFileId());
+            if (sourceFid != null) {
+                chunkBuilder.setSourceFid(sourceFid);
+            }
+            cleanedChunks.add(chunkBuilder.build());
+        }
+        return cleanedChunks;
+    }
+
+    public static FilerProto.Entry afterEntryDeserialization(FilerProto.Entry entry) {
+        if (entry.getChunksList().size() <= 0) {
+            return entry;
+        }
+        String fileId = entry.getChunks(0).getFileId();
+        if (fileId != null && fileId.length() != 0) {
+            return entry;
+        }
+        FilerProto.Entry.Builder entryBuilder = entry.toBuilder();
+        entryBuilder.clearChunks();
+        for (FilerProto.FileChunk chunk : entry.getChunksList()) {
+            FilerProto.FileChunk.Builder chunkBuilder = chunk.toBuilder();
+            chunkBuilder.setFileId(toFileId(chunk.getFid()));
+            String sourceFileId = toFileId(chunk.getSourceFid());
+            if (sourceFileId != null) {
+                chunkBuilder.setSourceFileId(sourceFileId);
+            }
+            entryBuilder.addChunks(chunkBuilder);
+        }
+        return entryBuilder.build();
+    }
+
     public boolean mkdirs(String path, int mode) {
         String currentUser = System.getProperty("user.name");
         return mkdirs(path, mode, 0, 0, currentUser, new String[]{});
@@ -156,7 +217,7 @@ public class FilerClient {
         List<FilerProto.Entry> results = new ArrayList<FilerProto.Entry>();
         String lastFileName = "";
         for (int limit = Integer.MAX_VALUE; limit > 0; ) {
-            List<FilerProto.Entry> t = listEntries(path, "", lastFileName, 1024);
+            List<FilerProto.Entry> t = listEntries(path, "", lastFileName, 1024, false);
             if (t == null) {
                 break;
             }
@@ -173,17 +234,18 @@ public class FilerClient {
         return results;
     }
 
-    public List<FilerProto.Entry> listEntries(String path, String entryPrefix, String lastEntryName, int limit) {
+    public List<FilerProto.Entry> listEntries(String path, String entryPrefix, String lastEntryName, int limit, boolean includeLastEntry) {
         Iterator<FilerProto.ListEntriesResponse> iter = filerGrpcClient.getBlockingStub().listEntries(FilerProto.ListEntriesRequest.newBuilder()
                 .setDirectory(path)
                 .setPrefix(entryPrefix)
                 .setStartFromFileName(lastEntryName)
+                .setInclusiveStartFrom(includeLastEntry)
                 .setLimit(limit)
                 .build());
         List<FilerProto.Entry> entries = new ArrayList<>();
-        while (iter.hasNext()){
+        while (iter.hasNext()) {
             FilerProto.ListEntriesResponse resp = iter.next();
-            entries.add(fixEntryAfterReading(resp.getEntry()));
+            entries.add(afterEntryDeserialization(resp.getEntry()));
         }
         return entries;
     }
@@ -195,9 +257,12 @@ public class FilerClient {
                             .setDirectory(directory)
                             .setName(entryName)
                             .build()).getEntry();
-            return fixEntryAfterReading(entry);
+            if (entry == null) {
+                return null;
+            }
+            return afterEntryDeserialization(entry);
         } catch (Exception e) {
-            if (e.getMessage().indexOf("filer: no entry is found in filer store")>0){
+            if (e.getMessage().indexOf("filer: no entry is found in filer store") > 0) {
                 return null;
             }
             LOG.warn("lookupEntry {}/{}: {}", directory, entryName, e);
@@ -205,7 +270,6 @@ public class FilerClient {
         }
     }
 
-
     public boolean createEntry(String parent, FilerProto.Entry entry) {
         try {
             filerGrpcClient.getBlockingStub().createEntry(FilerProto.CreateEntryRequest.newBuilder()
@@ -263,24 +327,4 @@ public class FilerClient {
         return true;
     }
 
-    private FilerProto.Entry fixEntryAfterReading(FilerProto.Entry entry) {
-        if (entry.getChunksList().size() <= 0) {
-            return entry;
-        }
-        String fileId = entry.getChunks(0).getFileId();
-        if (fileId != null && fileId.length() != 0) {
-            return entry;
-        }
-        FilerProto.Entry.Builder entryBuilder = entry.toBuilder();
-        entryBuilder.clearChunks();
-        for (FilerProto.FileChunk chunk : entry.getChunksList()) {
-            FilerProto.FileChunk.Builder chunkBuilder = chunk.toBuilder();
-            FilerProto.FileId fid = chunk.getFid();
-            fileId = String.format("%d,%d%x", fid.getVolumeId(), fid.getFileKey(), fid.getCookie());
-            chunkBuilder.setFileId(fileId);
-            entryBuilder.addChunks(chunkBuilder);
-        }
-        return entryBuilder.build();
-    }
-
 }

other/java/client/src/main/java/seaweedfs/client/FilerGrpcClient.java

@@ -9,17 +9,13 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import javax.net.ssl.SSLException;
+import java.util.Map;
+import java.util.HashMap;
 import java.util.concurrent.TimeUnit;
 
 public class FilerGrpcClient {
 
     private static final Logger logger = LoggerFactory.getLogger(FilerGrpcClient.class);
-
-    private final ManagedChannel channel;
-    private final SeaweedFilerGrpc.SeaweedFilerBlockingStub blockingStub;
-    private final SeaweedFilerGrpc.SeaweedFilerStub asyncStub;
-    private final SeaweedFilerGrpc.SeaweedFilerFutureStub futureStub;
-
     static SslContext sslContext;
 
     static {
@@ -30,6 +26,15 @@ public class FilerGrpcClient {
         }
     }
 
+    public final Map<String, FilerProto.Locations> vidLocations = new HashMap<>();
+    private final ManagedChannel channel;
+    private final SeaweedFilerGrpc.SeaweedFilerBlockingStub blockingStub;
+    private final SeaweedFilerGrpc.SeaweedFilerStub asyncStub;
+    private final SeaweedFilerGrpc.SeaweedFilerFutureStub futureStub;
+    private boolean cipher = false;
+    private String collection = "";
+    private String replication = "";
+
     public FilerGrpcClient(String host, int grpcPort) {
         this(host, grpcPort, sslContext);
     }
@@ -37,11 +42,20 @@ public class FilerGrpcClient {
     public FilerGrpcClient(String host, int grpcPort, SslContext sslContext) {
 
         this(sslContext == null ?
-                ManagedChannelBuilder.forAddress(host, grpcPort).usePlaintext() :
+                ManagedChannelBuilder.forAddress(host, grpcPort).usePlaintext()
+                        .maxInboundMessageSize(1024 * 1024 * 1024) :
                 NettyChannelBuilder.forAddress(host, grpcPort)
+                        .maxInboundMessageSize(1024 * 1024 * 1024)
                         .negotiationType(NegotiationType.TLS)
                         .sslContext(sslContext));
 
+        FilerProto.GetFilerConfigurationResponse filerConfigurationResponse =
+                this.getBlockingStub().getFilerConfiguration(
+                        FilerProto.GetFilerConfigurationRequest.newBuilder().build());
+        cipher = filerConfigurationResponse.getCipher();
+        collection = filerConfigurationResponse.getCollection();
+        replication = filerConfigurationResponse.getReplication();
+
     }
 
     public FilerGrpcClient(ManagedChannelBuilder<?> channelBuilder) {
@@ -51,6 +65,18 @@ public class FilerGrpcClient {
         futureStub = SeaweedFilerGrpc.newFutureStub(channel);
     }
 
+    public boolean isCipher() {
+        return cipher;
+    }
+
+    public String getCollection() {
+        return collection;
+    }
+
+    public String getReplication() {
+        return replication;
+    }
+
     public void shutdown() throws InterruptedException {
         channel.shutdown().awaitTermination(5, TimeUnit.SECONDS);
     }

other/java/client/src/main/java/seaweedfs/client/Gzip.java

@@ -0,0 +1,41 @@
+package seaweedfs.client;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.zip.GZIPInputStream;
+import java.util.zip.GZIPOutputStream;
+
+public class Gzip {
+    public static byte[] compress(byte[] data) throws IOException {
+        ByteArrayOutputStream bos = new ByteArrayOutputStream(data.length);
+        GZIPOutputStream gzip = new GZIPOutputStream(bos);
+        gzip.write(data);
+        gzip.close();
+        byte[] compressed = bos.toByteArray();
+        bos.close();
+        return compressed;
+    }
+
+    public static byte[] decompress(byte[] compressed) {
+        try {
+            ByteArrayInputStream bis = new ByteArrayInputStream(compressed);
+            GZIPInputStream gis = new GZIPInputStream(bis);
+            return readAll(gis);
+        } catch (Exception e) {
+            return compressed;
+        }
+    }
+
+    private static byte[] readAll(InputStream input) throws IOException {
+        try (ByteArrayOutputStream output = new ByteArrayOutputStream()) {
+            byte[] buffer = new byte[4096];
+            int n;
+            while (-1 != (n = input.read(buffer))) {
+                output.write(buffer, 0, n);
+            }
+            return output.toByteArray();
+        }
+    }
+}

other/java/client/src/main/java/seaweedfs/client/SeaweedCipher.java

@@ -0,0 +1,55 @@
+package seaweedfs.client;
+
+import javax.crypto.Cipher;
+import javax.crypto.spec.GCMParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+import java.security.SecureRandom;
+
+public class SeaweedCipher {
+    // AES-GCM parameters
+    public static final int AES_KEY_SIZE = 256; // in bits
+    public static final int GCM_NONCE_LENGTH = 12; // in bytes
+    public static final int GCM_TAG_LENGTH = 16; // in bytes
+
+    private static SecureRandom random = new SecureRandom();
+
+    public static byte[] genCipherKey() throws Exception {
+        byte[] key = new byte[AES_KEY_SIZE / 8];
+        random.nextBytes(key);
+        return key;
+    }
+
+    public static byte[] encrypt(byte[] clearTextbytes, byte[] cipherKey) throws Exception {
+        return encrypt(clearTextbytes, 0, clearTextbytes.length, cipherKey);
+    }
+
+    public static byte[] encrypt(byte[] clearTextbytes, int offset, int length, byte[] cipherKey) throws Exception {
+
+        final byte[] nonce = new byte[GCM_NONCE_LENGTH];
+        random.nextBytes(nonce);
+        GCMParameterSpec spec = new GCMParameterSpec(GCM_TAG_LENGTH * 8, nonce);
+        SecretKeySpec keySpec = new SecretKeySpec(cipherKey, "AES");
+
+        Cipher AES_cipherInstance = Cipher.getInstance("AES/GCM/NoPadding");
+        AES_cipherInstance.init(Cipher.ENCRYPT_MODE, keySpec, spec);
+
+        byte[] encryptedText = AES_cipherInstance.doFinal(clearTextbytes, offset, length);
+
+        byte[] iv = AES_cipherInstance.getIV();
+        byte[] message = new byte[GCM_NONCE_LENGTH + clearTextbytes.length + GCM_TAG_LENGTH];
+        System.arraycopy(iv, 0, message, 0, GCM_NONCE_LENGTH);
+        System.arraycopy(encryptedText, 0, message, GCM_NONCE_LENGTH, encryptedText.length);
+
+        return message;
+    }
+
+    public static byte[] decrypt(byte[] encryptedText, byte[] cipherKey) throws Exception {
+        final Cipher AES_cipherInstance = Cipher.getInstance("AES/GCM/NoPadding");
+        GCMParameterSpec params = new GCMParameterSpec(GCM_TAG_LENGTH * 8, encryptedText, 0, GCM_NONCE_LENGTH);
+        SecretKeySpec keySpec = new SecretKeySpec(cipherKey, "AES");
+        AES_cipherInstance.init(Cipher.DECRYPT_MODE, keySpec, params);
+        byte[] decryptedText = AES_cipherInstance.doFinal(encryptedText, GCM_NONCE_LENGTH, encryptedText.length - GCM_NONCE_LENGTH);
+        return decryptedText;
+    }
+
+}

other/java/client/src/main/java/seaweedfs/client/SeaweedRead.java

@@ -1,26 +1,29 @@
 package seaweedfs.client;
 
+import org.apache.http.Header;
+import org.apache.http.HeaderElement;
 import org.apache.http.HttpEntity;
 import org.apache.http.HttpHeaders;
-import org.apache.http.HttpResponse;
-import org.apache.http.client.HttpClient;
+import org.apache.http.client.entity.GzipDecompressingEntity;
+import org.apache.http.client.methods.CloseableHttpResponse;
 import org.apache.http.client.methods.HttpGet;
-import org.apache.http.impl.client.DefaultHttpClient;
+import org.apache.http.util.EntityUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
-import java.io.Closeable;
 import java.io.IOException;
-import java.io.OutputStream;
-import java.nio.ByteBuffer;
 import java.util.*;
 
 public class SeaweedRead {
 
-    // private static final Logger LOG = LoggerFactory.getLogger(SeaweedRead.class);
+    private static final Logger LOG = LoggerFactory.getLogger(SeaweedRead.class);
+
+    static ChunkCache chunkCache = new ChunkCache(4);
 
     // returns bytesRead
     public static long read(FilerGrpcClient filerGrpcClient, List<VisibleInterval> visibleIntervals,
                             final long position, final byte[] buffer, final int bufferOffset,
-                            final int bufferLength) throws IOException {
+                            final int bufferLength, final long fileSize) throws IOException {
 
         List<ChunkView> chunkViews = viewFromVisibles(visibleIntervals, position, bufferLength);
 
@@ -31,7 +34,7 @@ public class SeaweedRead {
         }
 
         FilerProto.LookupVolumeResponse lookupResponse = filerGrpcClient
-            .getBlockingStub().lookupVolume(lookupRequest.build());
+                .getBlockingStub().lookupVolume(lookupRequest.build());
 
         Map<String, FilerProto.Locations> vid2Locations = lookupResponse.getLocationsMapMap();
 
@@ -39,50 +42,110 @@ public class SeaweedRead {
         long readCount = 0;
         int startOffset = bufferOffset;
         for (ChunkView chunkView : chunkViews) {
+
+            if (startOffset < chunkView.logicOffset) {
+                long gap = chunkView.logicOffset - startOffset;
+                LOG.debug("zero [{},{})", startOffset, startOffset + gap);
+                readCount += gap;
+                startOffset += gap;
+            }
+
             FilerProto.Locations locations = vid2Locations.get(parseVolumeId(chunkView.fileId));
-            if (locations.getLocationsCount() == 0) {
+            if (locations == null || locations.getLocationsCount() == 0) {
+                LOG.error("failed to locate {}", chunkView.fileId);
                 // log here!
                 return 0;
             }
 
             int len = readChunkView(position, buffer, startOffset, chunkView, locations);
 
+            LOG.debug("read [{},{}) {} size {}", startOffset, startOffset + len, chunkView.fileId, chunkView.size);
+
             readCount += len;
             startOffset += len;
 
         }
 
+        long limit = Math.min(bufferLength, fileSize);
+
+        if (startOffset < limit) {
+            long gap = limit - startOffset;
+            LOG.debug("zero2 [{},{})", startOffset, startOffset + gap);
+            readCount += gap;
+            startOffset += gap;
+        }
+
         return readCount;
     }
 
     private static int readChunkView(long position, byte[] buffer, int startOffset, ChunkView chunkView, FilerProto.Locations locations) throws IOException {
-        HttpClient client = new DefaultHttpClient();
-        HttpGet request = new HttpGet(
-            String.format("http://%s/%s", locations.getLocations(0).getUrl(), chunkView.fileId));
 
-        if (!chunkView.isFullChunk) {
-            request.setHeader(HttpHeaders.ACCEPT_ENCODING, "");
-            request.setHeader(HttpHeaders.RANGE,
-                String.format("bytes=%d-%d", chunkView.offset, chunkView.offset + chunkView.size - 1));
+        byte[] chunkData = chunkCache.getChunk(chunkView.fileId);
+
+        if (chunkData == null) {
+            chunkData = doFetchFullChunkData(chunkView, locations);
+            chunkCache.setChunk(chunkView.fileId, chunkData);
         }
 
+        int len = (int) chunkView.size;
+        LOG.debug("readChunkView fid:{} chunkData.length:{} chunkView.offset:{} buffer.length:{} startOffset:{} len:{}",
+                chunkView.fileId, chunkData.length, chunkView.offset, buffer.length, startOffset, len);
+        System.arraycopy(chunkData, startOffset - (int) (chunkView.logicOffset - chunkView.offset), buffer, startOffset, len);
+
+        return len;
+    }
+
+    public static byte[] doFetchFullChunkData(ChunkView chunkView, FilerProto.Locations locations) throws IOException {
+
+        HttpGet request = new HttpGet(
+                String.format("http://%s/%s", locations.getLocations(0).getUrl(), chunkView.fileId));
+
+        request.setHeader(HttpHeaders.ACCEPT_ENCODING, "gzip");
+
+        byte[] data = null;
+
+        CloseableHttpResponse response = SeaweedUtil.getClosableHttpClient().execute(request);
+
         try {
-            HttpResponse response = client.execute(request);
             HttpEntity entity = response.getEntity();
 
-            int len = (int) (chunkView.logicOffset - position + chunkView.size);
-            OutputStream outputStream = new ByteBufferOutputStream(ByteBuffer.wrap(buffer, startOffset, len));
-            entity.writeTo(outputStream);
-            // LOG.debug("* read chunkView:{} startOffset:{} length:{}", chunkView, startOffset, len);
+            Header contentEncodingHeader = entity.getContentEncoding();
 
-            return len;
+            if (contentEncodingHeader != null) {
+                HeaderElement[] encodings = contentEncodingHeader.getElements();
+                for (int i = 0; i < encodings.length; i++) {
+                    if (encodings[i].getName().equalsIgnoreCase("gzip")) {
+                        entity = new GzipDecompressingEntity(entity);
+                        break;
+                    }
+                }
+            }
+
+            data = EntityUtils.toByteArray(entity);
+
+            EntityUtils.consume(entity);
 
         } finally {
-            if (client instanceof Closeable) {
-                Closeable t = (Closeable) client;
-                t.close();
+            response.close();
+            request.releaseConnection();
+        }
+
+        if (chunkView.cipherKey != null && chunkView.cipherKey.length != 0) {
+            try {
+                data = SeaweedCipher.decrypt(data, chunkView.cipherKey);
+            } catch (Exception e) {
+                throw new IOException("fail to decrypt", e);
             }
         }
+
+        if (chunkView.isCompressed) {
+            data = Gzip.decompress(data);
+        }
+
+        LOG.debug("doFetchFullChunkData fid:{} chunkData.length:{}", chunkView.fileId, data.length);
+
+        return data;
+
     }
 
     protected static List<ChunkView> viewFromVisibles(List<VisibleInterval> visibleIntervals, long offset, long size) {
@@ -90,27 +153,40 @@ public class SeaweedRead {
 
         long stop = offset + size;
         for (VisibleInterval chunk : visibleIntervals) {
-            if (chunk.start <= offset && offset < chunk.stop && offset < stop) {
+            long chunkStart = Math.max(offset, chunk.start);
+            long chunkStop = Math.min(stop, chunk.stop);
+            if (chunkStart < chunkStop) {
                 boolean isFullChunk = chunk.isFullChunk && chunk.start == offset && chunk.stop <= stop;
                 views.add(new ChunkView(
-                    chunk.fileId,
-                    offset - chunk.start,
-                    Math.min(chunk.stop, stop) - offset,
-                    offset,
-                    isFullChunk
+                        chunk.fileId,
+                        chunkStart - chunk.start + chunk.chunkOffset,
+                        chunkStop - chunkStart,
+                        chunkStart,
+                        isFullChunk,
+                        chunk.cipherKey,
+                        chunk.isCompressed
                 ));
-                offset = Math.min(chunk.stop, stop);
             }
         }
         return views;
     }
 
-    public static List<VisibleInterval> nonOverlappingVisibleIntervals(List<FilerProto.FileChunk> chunkList) {
+    public static List<VisibleInterval> nonOverlappingVisibleIntervals(
+            final FilerGrpcClient filerGrpcClient, List<FilerProto.FileChunk> chunkList) throws IOException {
+
+        chunkList = FileChunkManifest.resolveChunkManifest(filerGrpcClient, chunkList);
+
         FilerProto.FileChunk[] chunks = chunkList.toArray(new FilerProto.FileChunk[0]);
         Arrays.sort(chunks, new Comparator<FilerProto.FileChunk>() {
             @Override
             public int compare(FilerProto.FileChunk a, FilerProto.FileChunk b) {
-                return (int) (a.getMtime() - b.getMtime());
+                // if just a.getMtime() - b.getMtime(), it will overflow!
+                if (a.getMtime() < b.getMtime()) {
+                    return -1;
+                } else if (a.getMtime() > b.getMtime()) {
+                    return 1;
+                }
+                return 0;
             }
         });
 
@@ -127,11 +203,14 @@ public class SeaweedRead {
                                                            List<VisibleInterval> newVisibles,
                                                            FilerProto.FileChunk chunk) {
         VisibleInterval newV = new VisibleInterval(
-            chunk.getOffset(),
-            chunk.getOffset() + chunk.getSize(),
-            chunk.getFileId(),
-            chunk.getMtime(),
-            true
+                chunk.getOffset(),
+                chunk.getOffset() + chunk.getSize(),
+                chunk.getFileId(),
+                chunk.getMtime(),
+                0,
+                true,
+                chunk.getCipherKey().toByteArray(),
+                chunk.getIsCompressed()
         );
 
         // easy cases to speed up
@@ -147,21 +226,27 @@ public class SeaweedRead {
         for (VisibleInterval v : visibles) {
             if (v.start < chunk.getOffset() && chunk.getOffset() < v.stop) {
                 newVisibles.add(new VisibleInterval(
-                    v.start,
-                    chunk.getOffset(),
-                    v.fileId,
-                    v.modifiedTime,
-                    false
+                        v.start,
+                        chunk.getOffset(),
+                        v.fileId,
+                        v.modifiedTime,
+                        v.chunkOffset,
+                        false,
+                        v.cipherKey,
+                        v.isCompressed
                 ));
             }
             long chunkStop = chunk.getOffset() + chunk.getSize();
             if (v.start < chunkStop && chunkStop < v.stop) {
                 newVisibles.add(new VisibleInterval(
-                    chunkStop,
-                    v.stop,
-                    v.fileId,
-                    v.modifiedTime,
-                    false
+                        chunkStop,
+                        v.stop,
+                        v.fileId,
+                        v.modifiedTime,
+                        v.chunkOffset + (chunkStop - v.start),
+                        false,
+                        v.cipherKey,
+                        v.isCompressed
                 ));
             }
             if (chunkStop <= v.start || v.stop <= chunk.getOffset()) {
@@ -191,6 +276,10 @@ public class SeaweedRead {
         return fileId;
     }
 
+    public static long fileSize(FilerProto.Entry entry) {
+        return Math.max(totalSize(entry.getChunksList()), entry.getAttributes().getFileSize());
+    }
+
     public static long totalSize(List<FilerProto.FileChunk> chunksList) {
         long size = 0;
         for (FilerProto.FileChunk chunk : chunksList) {
@@ -207,25 +296,33 @@ public class SeaweedRead {
         public final long stop;
         public final long modifiedTime;
         public final String fileId;
+        public final long chunkOffset;
         public final boolean isFullChunk;
+        public final byte[] cipherKey;
+        public final boolean isCompressed;
 
-        public VisibleInterval(long start, long stop, String fileId, long modifiedTime, boolean isFullChunk) {
+        public VisibleInterval(long start, long stop, String fileId, long modifiedTime, long chunkOffset, boolean isFullChunk, byte[] cipherKey, boolean isCompressed) {
             this.start = start;
             this.stop = stop;
             this.modifiedTime = modifiedTime;
             this.fileId = fileId;
+            this.chunkOffset = chunkOffset;
             this.isFullChunk = isFullChunk;
+            this.cipherKey = cipherKey;
+            this.isCompressed = isCompressed;
         }
 
         @Override
         public String toString() {
             return "VisibleInterval{" +
-                "start=" + start +
-                ", stop=" + stop +
-                ", modifiedTime=" + modifiedTime +
-                ", fileId='" + fileId + '\'' +
-                ", isFullChunk=" + isFullChunk +
-                '}';
+                    "start=" + start +
+                    ", stop=" + stop +
+                    ", modifiedTime=" + modifiedTime +
+                    ", fileId='" + fileId + '\'' +
+                    ", isFullChunk=" + isFullChunk +
+                    ", cipherKey=" + Arrays.toString(cipherKey) +
+                    ", isCompressed=" + isCompressed +
+                    '}';
         }
     }
 
@@ -235,24 +332,30 @@ public class SeaweedRead {
         public final long size;
         public final long logicOffset;
         public final boolean isFullChunk;
+        public final byte[] cipherKey;
+        public final boolean isCompressed;
 
-        public ChunkView(String fileId, long offset, long size, long logicOffset, boolean isFullChunk) {
+        public ChunkView(String fileId, long offset, long size, long logicOffset, boolean isFullChunk, byte[] cipherKey, boolean isCompressed) {
             this.fileId = fileId;
             this.offset = offset;
             this.size = size;
             this.logicOffset = logicOffset;
             this.isFullChunk = isFullChunk;
+            this.cipherKey = cipherKey;
+            this.isCompressed = isCompressed;
         }
 
         @Override
         public String toString() {
             return "ChunkView{" +
-                "fileId='" + fileId + '\'' +
-                ", offset=" + offset +
-                ", size=" + size +
-                ", logicOffset=" + logicOffset +
-                ", isFullChunk=" + isFullChunk +
-                '}';
+                    "fileId='" + fileId + '\'' +
+                    ", offset=" + offset +
+                    ", size=" + size +
+                    ", logicOffset=" + logicOffset +
+                    ", isFullChunk=" + isFullChunk +
+                    ", cipherKey=" + Arrays.toString(cipherKey) +
+                    ", isCompressed=" + isCompressed +
+                    '}';
         }
     }
 

other/java/client/src/main/java/seaweedfs/client/SeaweedUtil.java

@@ -0,0 +1,30 @@
+package seaweedfs.client;
+
+import org.apache.http.impl.DefaultConnectionReuseStrategy;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.DefaultConnectionKeepAliveStrategy;
+import org.apache.http.impl.client.HttpClientBuilder;
+import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
+
+public class SeaweedUtil {
+
+    static PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
+    static CloseableHttpClient httpClient;
+
+    static {
+        // Increase max total connection to 200
+        cm.setMaxTotal(200);
+        // Increase default max connection per route to 20
+        cm.setDefaultMaxPerRoute(20);
+
+        httpClient = HttpClientBuilder.create()
+                .setConnectionManager(cm)
+                .setConnectionReuseStrategy(DefaultConnectionReuseStrategy.INSTANCE)
+                .setKeepAliveStrategy(DefaultConnectionKeepAliveStrategy.INSTANCE)
+                .build();
+    }
+
+    public static CloseableHttpClient getClosableHttpClient() {
+        return httpClient;
+    }
+}

other/java/client/src/main/java/seaweedfs/client/SeaweedWrite.java

@@ -1,31 +1,50 @@
 package seaweedfs.client;
 
-import org.apache.http.HttpResponse;
-import org.apache.http.client.HttpClient;
+import com.google.protobuf.ByteString;
+import org.apache.http.client.methods.CloseableHttpResponse;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.entity.mime.HttpMultipartMode;
 import org.apache.http.entity.mime.MultipartEntityBuilder;
-import org.apache.http.impl.client.DefaultHttpClient;
+import org.apache.http.util.EntityUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.io.ByteArrayInputStream;
-import java.io.Closeable;
 import java.io.IOException;
 import java.io.InputStream;
+import java.security.SecureRandom;
+import java.util.List;
 
 public class SeaweedWrite {
 
+    private static final Logger LOG = LoggerFactory.getLogger(SeaweedWrite.class);
+
+    private static final SecureRandom random = new SecureRandom();
+
     public static void writeData(FilerProto.Entry.Builder entry,
                                  final String replication,
                                  final FilerGrpcClient filerGrpcClient,
                                  final long offset,
                                  final byte[] bytes,
                                  final long bytesOffset, final long bytesLength) throws IOException {
+        FilerProto.FileChunk.Builder chunkBuilder = writeChunk(
+                replication, filerGrpcClient, offset, bytes, bytesOffset, bytesLength);
+        synchronized (entry) {
+            entry.addChunks(chunkBuilder);
+        }
+    }
+
+    public static FilerProto.FileChunk.Builder writeChunk(final String replication,
+                                                          final FilerGrpcClient filerGrpcClient,
+                                                          final long offset,
+                                                          final byte[] bytes,
+                                                          final long bytesOffset,
+                                                          final long bytesLength) throws IOException {
         FilerProto.AssignVolumeResponse response = filerGrpcClient.getBlockingStub().assignVolume(
                 FilerProto.AssignVolumeRequest.newBuilder()
-                        .setCollection("")
-                        .setReplication(replication)
+                        .setCollection(filerGrpcClient.getCollection())
+                        .setReplication(replication == null ? filerGrpcClient.getReplication() : replication)
                         .setDataCenter("")
-                        .setReplication("")
                         .setTtlSec(0)
                         .build());
         String fileId = response.getFileId();
@@ -33,36 +52,60 @@ public class SeaweedWrite {
         String auth = response.getAuth();
         String targetUrl = String.format("http://%s/%s", url, fileId);
 
-        String etag = multipartUpload(targetUrl, auth, bytes, bytesOffset, bytesLength);
+        ByteString cipherKeyString = com.google.protobuf.ByteString.EMPTY;
+        byte[] cipherKey = null;
+        if (filerGrpcClient.isCipher()) {
+            cipherKey = genCipherKey();
+            cipherKeyString = ByteString.copyFrom(cipherKey);
+        }
 
-        entry.addChunks(FilerProto.FileChunk.newBuilder()
+        String etag = multipartUpload(targetUrl, auth, bytes, bytesOffset, bytesLength, cipherKey);
+
+        LOG.debug("write file chunk {} size {}", targetUrl, bytesLength);
+
+        return FilerProto.FileChunk.newBuilder()
                 .setFileId(fileId)
                 .setOffset(offset)
                 .setSize(bytesLength)
                 .setMtime(System.currentTimeMillis() / 10000L)
                 .setETag(etag)
-        );
-
+                .setCipherKey(cipherKeyString);
     }
 
     public static void writeMeta(final FilerGrpcClient filerGrpcClient,
-                                 final String parentDirectory, final FilerProto.Entry.Builder entry) {
-        filerGrpcClient.getBlockingStub().createEntry(
-                FilerProto.CreateEntryRequest.newBuilder()
-                        .setDirectory(parentDirectory)
-                        .setEntry(entry)
-                        .build()
-        );
+                                 final String parentDirectory,
+                                 final FilerProto.Entry.Builder entry) throws IOException {
+
+        synchronized (entry) {
+            List<FilerProto.FileChunk> chunks = FileChunkManifest.maybeManifestize(filerGrpcClient, entry.getChunksList());
+            entry.clearChunks();
+            entry.addAllChunks(chunks);
+            filerGrpcClient.getBlockingStub().createEntry(
+                    FilerProto.CreateEntryRequest.newBuilder()
+                            .setDirectory(parentDirectory)
+                            .setEntry(entry)
+                            .build()
+            );
+        }
     }
 
     private static String multipartUpload(String targetUrl,
                                           String auth,
                                           final byte[] bytes,
-                                          final long bytesOffset, final long bytesLength) throws IOException {
+                                          final long bytesOffset, final long bytesLength,
+                                          byte[] cipherKey) throws IOException {
 
-        HttpClient client = new DefaultHttpClient();
-
-        InputStream inputStream = new ByteArrayInputStream(bytes, (int) bytesOffset, (int) bytesLength);
+        InputStream inputStream = null;
+        if (cipherKey == null || cipherKey.length == 0) {
+            inputStream = new ByteArrayInputStream(bytes, (int) bytesOffset, (int) bytesLength);
+        } else {
+            try {
+                byte[] encryptedBytes = SeaweedCipher.encrypt(bytes, (int) bytesOffset, (int) bytesLength, cipherKey);
+                inputStream = new ByteArrayInputStream(encryptedBytes, 0, encryptedBytes.length);
+            } catch (Exception e) {
+                throw new IOException("fail to encrypt data", e);
+            }
+        }
 
         HttpPost post = new HttpPost(targetUrl);
         if (auth != null && auth.length() != 0) {
@@ -74,8 +117,9 @@ public class SeaweedWrite {
                 .addBinaryBody("upload", inputStream)
                 .build());
 
+        CloseableHttpResponse response = SeaweedUtil.getClosableHttpClient().execute(post);
+
         try {
-            HttpResponse response = client.execute(post);
 
             String etag = response.getLastHeader("ETag").getValue();
 
@@ -83,13 +127,19 @@ public class SeaweedWrite {
                 etag = etag.substring(1, etag.length() - 1);
             }
 
+            EntityUtils.consume(response.getEntity());
+
             return etag;
         } finally {
-            if (client instanceof Closeable) {
-                Closeable t = (Closeable) client;
-                t.close();
-            }
+            response.close();
+            post.releaseConnection();
         }
 
     }
+
+    private static byte[] genCipherKey() {
+        byte[] b = new byte[32];
+        random.nextBytes(b);
+        return b;
+    }
 }

other/java/client/src/main/proto/filer.proto

@@ -2,6 +2,7 @@ syntax = "proto3";
 
 package filer_pb;
 
+option go_package = "github.com/chrislusf/seaweedfs/weed/pb/filer_pb";
 option java_package = "seaweedfs.client";
 option java_outer_classname = "FilerProto";
 
@@ -21,6 +22,9 @@ service SeaweedFiler {
     rpc UpdateEntry (UpdateEntryRequest) returns (UpdateEntryResponse) {
     }
 
+    rpc AppendToEntry (AppendToEntryRequest) returns (AppendToEntryResponse) {
+    }
+
     rpc DeleteEntry (DeleteEntryRequest) returns (DeleteEntryResponse) {
     }
 
@@ -42,6 +46,24 @@ service SeaweedFiler {
     rpc GetFilerConfiguration (GetFilerConfigurationRequest) returns (GetFilerConfigurationResponse) {
     }
 
+    rpc SubscribeMetadata (SubscribeMetadataRequest) returns (stream SubscribeMetadataResponse) {
+    }
+
+    rpc SubscribeLocalMetadata (SubscribeMetadataRequest) returns (stream SubscribeMetadataResponse) {
+    }
+
+    rpc KeepConnected (stream KeepConnectedRequest) returns (stream KeepConnectedResponse) {
+    }
+
+    rpc LocateBroker (LocateBrokerRequest) returns (LocateBrokerResponse) {
+    }
+
+    rpc KvGet (KvGetRequest) returns (KvGetResponse) {
+    }
+
+    rpc KvPut (KvPutRequest) returns (KvPutResponse) {
+    }
+
 }
 
 //////////////////////////////////////////////////
@@ -73,6 +95,8 @@ message Entry {
     repeated FileChunk chunks = 3;
     FuseAttributes attributes = 4;
     map<string, bytes> extended = 5;
+    bytes hard_link_id = 7;
+    int32 hard_link_counter = 8; // only exists in hard link meta data
 }
 
 message FullEntry {
@@ -85,6 +109,8 @@ message EventNotification {
     Entry new_entry = 2;
     bool delete_chunks = 3;
     string new_parent_path = 4;
+    bool is_from_other_cluster = 5;
+    repeated int32 signatures = 6;
 }
 
 message FileChunk {
@@ -96,6 +122,13 @@ message FileChunk {
     string source_file_id = 6; // to be deprecated
     FileId fid = 7;
     FileId source_fid = 8;
+    bytes cipher_key = 9;
+    bool is_compressed = 10;
+    bool is_chunk_manifest = 11; // content is a list of FileChunks
+}
+
+message FileChunkManifest {
+    repeated FileChunk chunks = 1;
 }
 
 message FileId {
@@ -118,12 +151,15 @@ message FuseAttributes {
     string user_name = 11; // for hdfs
     repeated string group_name = 12; // for hdfs
     string symlink_target = 13;
+    bytes md5 = 14;
 }
 
 message CreateEntryRequest {
     string directory = 1;
     Entry entry = 2;
     bool o_excl = 3;
+    bool is_from_other_cluster = 4;
+    repeated int32 signatures = 5;
 }
 
 message CreateEntryResponse {
@@ -133,10 +169,20 @@ message CreateEntryResponse {
 message UpdateEntryRequest {
     string directory = 1;
     Entry entry = 2;
+    bool is_from_other_cluster = 3;
+    repeated int32 signatures = 4;
 }
 message UpdateEntryResponse {
 }
 
+message AppendToEntryRequest {
+    string directory = 1;
+    string entry_name = 2;
+    repeated FileChunk chunks = 3;
+}
+message AppendToEntryResponse {
+}
+
 message DeleteEntryRequest {
     string directory = 1;
     string name = 2;
@@ -144,9 +190,12 @@ message DeleteEntryRequest {
     bool is_delete_data = 4;
     bool is_recursive = 5;
     bool ignore_recursive_error = 6;
+    bool is_from_other_cluster = 7;
+    repeated int32 signatures = 8;
 }
 
 message DeleteEntryResponse {
+    string error = 1;
 }
 
 message AtomicRenameEntryRequest {
@@ -165,6 +214,7 @@ message AssignVolumeRequest {
     string replication = 3;
     int32 ttl_sec = 4;
     string data_center = 5;
+    string parent_path = 6;
 }
 
 message AssignVolumeResponse {
@@ -173,6 +223,9 @@ message AssignVolumeResponse {
     string public_url = 3;
     int32 count = 4;
     string auth = 5;
+    string collection = 6;
+    string replication = 7;
+    string error = 8;
 }
 
 message LookupVolumeRequest {
@@ -219,4 +272,65 @@ message GetFilerConfigurationResponse {
     string replication = 2;
     string collection = 3;
     uint32 max_mb = 4;
+    string dir_buckets = 5;
+    bool cipher = 7;
+    int32 signature = 8;
+    string metrics_address = 9;
+    int32 metrics_interval_sec = 10;
+}
+
+message SubscribeMetadataRequest {
+    string client_name = 1;
+    string path_prefix = 2;
+    int64 since_ns = 3;
+    int32 signature = 4;
+}
+message SubscribeMetadataResponse {
+    string directory = 1;
+    EventNotification event_notification = 2;
+    int64 ts_ns = 3;
+}
+
+message LogEntry {
+    int64 ts_ns = 1;
+    int32 partition_key_hash = 2;
+    bytes data = 3;
+}
+
+message KeepConnectedRequest {
+    string name = 1;
+    uint32 grpc_port = 2;
+    repeated string resources = 3;
+}
+message KeepConnectedResponse {
+}
+
+message LocateBrokerRequest {
+    string resource = 1;
+}
+message LocateBrokerResponse {
+    bool found = 1;
+    // if found, send the exact address
+    // if not found, send the full list of existing brokers
+    message Resource {
+        string grpc_addresses = 1;
+        int32 resource_count = 2;
+    }
+    repeated Resource resources = 2;
+}
+
+// Key-Value operations
+message KvGetRequest {
+    bytes key = 1;
+}
+message KvGetResponse {
+    bytes value = 1;
+    string error = 2;
+}
+message KvPutRequest {
+    bytes key = 1;
+    bytes value = 2;
+}
+message KvPutResponse {
+    string error = 1;
 }

other/java/client/src/test/java/seaweedfs/client/SeaweedCipherTest.java

@@ -0,0 +1,42 @@
+package seaweedfs.client;
+
+import org.junit.Test;
+
+import java.util.Base64;
+
+import static seaweedfs.client.SeaweedCipher.decrypt;
+import static seaweedfs.client.SeaweedCipher.encrypt;
+
+public class SeaweedCipherTest {
+
+    @Test
+    public void testSameAsGoImplemnetation() throws Exception {
+        byte[] secretKey = "256-bit key for AES 256 GCM encr".getBytes();
+
+        String plainText = "Now we need to generate a 256-bit key for AES 256 GCM";
+
+        System.out.println("Original Text : " + plainText);
+
+        byte[] cipherText = encrypt(plainText.getBytes(), secretKey);
+        System.out.println("Encrypted Text : " + Base64.getEncoder().encodeToString(cipherText));
+
+        byte[] decryptedText = decrypt(cipherText, secretKey);
+        System.out.println("DeCrypted Text : " + new String(decryptedText));
+    }
+
+    @Test
+    public void testEncryptDecrypt() throws Exception {
+        byte[] secretKey = SeaweedCipher.genCipherKey();
+
+        String plainText = "Now we need to generate a 256-bit key for AES 256 GCM";
+
+        System.out.println("Original Text : " + plainText);
+
+        byte[] cipherText = encrypt(plainText.getBytes(), secretKey);
+        System.out.println("Encrypted Text : " + Base64.getEncoder().encodeToString(cipherText));
+
+        byte[] decryptedText = decrypt(cipherText, secretKey);
+        System.out.println("DeCrypted Text : " + new String(decryptedText));
+    }
+
+}

other/java/client/src/test/java/seaweedfs/client/SeaweedReadTest.java

@@ -3,13 +3,14 @@ package seaweedfs.client;
 import org.junit.Assert;
 import org.junit.Test;
 
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 
 public class SeaweedReadTest {
 
     @Test
-    public void testNonOverlappingVisibleIntervals() {
+    public void testNonOverlappingVisibleIntervals() throws IOException {
         List<FilerProto.FileChunk> chunks = new ArrayList<>();
         chunks.add(FilerProto.FileChunk.newBuilder()
             .setFileId("aaa")
@@ -24,7 +25,7 @@ public class SeaweedReadTest {
             .setMtime(2000)
             .build());
 
-        List<SeaweedRead.VisibleInterval> visibleIntervals = SeaweedRead.nonOverlappingVisibleIntervals(chunks);
+        List<SeaweedRead.VisibleInterval> visibleIntervals = SeaweedRead.nonOverlappingVisibleIntervals(null, chunks);
         for (SeaweedRead.VisibleInterval visibleInterval : visibleIntervals) {
             System.out.println("visible:" + visibleInterval);
         }

other/java/hdfs2/dependency-reduced-pom.xml

@@ -15,8 +15,8 @@
       <plugin>
         <artifactId>maven-compiler-plugin</artifactId>
         <configuration>
-          <source>7</source>
-          <target>7</target>
+          <source>8</source>
+          <target>8</target>
         </configuration>
       </plugin>
       <plugin>
@@ -120,6 +120,180 @@
       </plugin>
     </plugins>
   </build>
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.hadoop</groupId>
+      <artifactId>hadoop-client</artifactId>
+      <version>2.9.2</version>
+      <scope>provided</scope>
+      <exclusions>
+        <exclusion>
+          <artifactId>hadoop-hdfs-client</artifactId>
+          <groupId>org.apache.hadoop</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>hadoop-mapreduce-client-app</artifactId>
+          <groupId>org.apache.hadoop</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>hadoop-yarn-api</artifactId>
+          <groupId>org.apache.hadoop</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>hadoop-mapreduce-client-core</artifactId>
+          <groupId>org.apache.hadoop</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>hadoop-mapreduce-client-jobclient</artifactId>
+          <groupId>org.apache.hadoop</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>hadoop-annotations</artifactId>
+          <groupId>org.apache.hadoop</groupId>
+        </exclusion>
+      </exclusions>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hadoop</groupId>
+      <artifactId>hadoop-common</artifactId>
+      <version>2.9.2</version>
+      <scope>provided</scope>
+      <exclusions>
+        <exclusion>
+          <artifactId>commons-cli</artifactId>
+          <groupId>commons-cli</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-math3</artifactId>
+          <groupId>org.apache.commons</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>xmlenc</artifactId>
+          <groupId>xmlenc</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-io</artifactId>
+          <groupId>commons-io</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-net</artifactId>
+          <groupId>commons-net</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-collections</artifactId>
+          <groupId>commons-collections</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>servlet-api</artifactId>
+          <groupId>javax.servlet</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jetty</artifactId>
+          <groupId>org.mortbay.jetty</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jetty-util</artifactId>
+          <groupId>org.mortbay.jetty</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jetty-sslengine</artifactId>
+          <groupId>org.mortbay.jetty</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jsp-api</artifactId>
+          <groupId>javax.servlet.jsp</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jersey-core</artifactId>
+          <groupId>com.sun.jersey</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jersey-json</artifactId>
+          <groupId>com.sun.jersey</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jersey-server</artifactId>
+          <groupId>com.sun.jersey</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>log4j</artifactId>
+          <groupId>log4j</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jets3t</artifactId>
+          <groupId>net.java.dev.jets3t</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-lang</artifactId>
+          <groupId>commons-lang</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-configuration</artifactId>
+          <groupId>commons-configuration</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-lang3</artifactId>
+          <groupId>org.apache.commons</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>slf4j-log4j12</artifactId>
+          <groupId>org.slf4j</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jackson-core-asl</artifactId>
+          <groupId>org.codehaus.jackson</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jackson-mapper-asl</artifactId>
+          <groupId>org.codehaus.jackson</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>avro</artifactId>
+          <groupId>org.apache.avro</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>hadoop-auth</artifactId>
+          <groupId>org.apache.hadoop</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jsch</artifactId>
+          <groupId>com.jcraft</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>curator-client</artifactId>
+          <groupId>org.apache.curator</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>curator-recipes</artifactId>
+          <groupId>org.apache.curator</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>htrace-core4</artifactId>
+          <groupId>org.apache.htrace</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>zookeeper</artifactId>
+          <groupId>org.apache.zookeeper</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-compress</artifactId>
+          <groupId>org.apache.commons</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>stax2-api</artifactId>
+          <groupId>org.codehaus.woodstox</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>woodstox-core</artifactId>
+          <groupId>com.fasterxml.woodstox</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>hadoop-annotations</artifactId>
+          <groupId>org.apache.hadoop</groupId>
+        </exclusion>
+      </exclusions>
+    </dependency>
+  </dependencies>
   <distributionManagement>
     <snapshotRepository>
       <id>ossrh</id>
@@ -127,7 +301,7 @@
     </snapshotRepository>
   </distributionManagement>
   <properties>
-    <seaweedfs.client.version>1.2.4</seaweedfs.client.version>
+    <seaweedfs.client.version>1.4.8</seaweedfs.client.version>
     <hadoop.version>2.9.2</hadoop.version>
   </properties>
 </project>

other/java/hdfs2/pom.xml

@@ -5,7 +5,7 @@
     <modelVersion>4.0.0</modelVersion>
 
     <properties>
-        <seaweedfs.client.version>1.2.4</seaweedfs.client.version>
+        <seaweedfs.client.version>1.4.8</seaweedfs.client.version>
         <hadoop.version>2.9.2</hadoop.version>
     </properties>
 
@@ -31,8 +31,8 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>7</source>
-                    <target>7</target>
+                    <source>8</source>
+                    <target>8</target>
                 </configuration>
             </plugin>
             <plugin>
@@ -147,6 +147,7 @@
             <groupId>org.apache.hadoop</groupId>
             <artifactId>hadoop-client</artifactId>
             <version>${hadoop.version}</version>
+            <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>com.github.chrislusf</groupId>
@@ -157,6 +158,7 @@
             <groupId>org.apache.hadoop</groupId>
             <artifactId>hadoop-common</artifactId>
             <version>${hadoop.version}</version>
+            <scope>provided</scope>
         </dependency>
     </dependencies>
 

other/java/hdfs2/src/main/java/seaweed/hdfs/ReadBuffer.java

@@ -1,137 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package seaweed.hdfs;
-
-import java.util.concurrent.CountDownLatch;
-
-class ReadBuffer {
-
-  private SeaweedInputStream stream;
-  private long offset;                   // offset within the file for the buffer
-  private int length;                    // actual length, set after the buffer is filles
-  private int requestedLength;           // requested length of the read
-  private byte[] buffer;                 // the buffer itself
-  private int bufferindex = -1;          // index in the buffers array in Buffer manager
-  private ReadBufferStatus status;             // status of the buffer
-  private CountDownLatch latch = null;   // signaled when the buffer is done reading, so any client
-  // waiting on this buffer gets unblocked
-
-  // fields to help with eviction logic
-  private long timeStamp = 0;  // tick at which buffer became available to read
-  private boolean isFirstByteConsumed = false;
-  private boolean isLastByteConsumed = false;
-  private boolean isAnyByteConsumed = false;
-
-  public SeaweedInputStream getStream() {
-    return stream;
-  }
-
-  public void setStream(SeaweedInputStream stream) {
-    this.stream = stream;
-  }
-
-  public long getOffset() {
-    return offset;
-  }
-
-  public void setOffset(long offset) {
-    this.offset = offset;
-  }
-
-  public int getLength() {
-    return length;
-  }
-
-  public void setLength(int length) {
-    this.length = length;
-  }
-
-  public int getRequestedLength() {
-    return requestedLength;
-  }
-
-  public void setRequestedLength(int requestedLength) {
-    this.requestedLength = requestedLength;
-  }
-
-  public byte[] getBuffer() {
-    return buffer;
-  }
-
-  public void setBuffer(byte[] buffer) {
-    this.buffer = buffer;
-  }
-
-  public int getBufferindex() {
-    return bufferindex;
-  }
-
-  public void setBufferindex(int bufferindex) {
-    this.bufferindex = bufferindex;
-  }
-
-  public ReadBufferStatus getStatus() {
-    return status;
-  }
-
-  public void setStatus(ReadBufferStatus status) {
-    this.status = status;
-  }
-
-  public CountDownLatch getLatch() {
-    return latch;
-  }
-
-  public void setLatch(CountDownLatch latch) {
-    this.latch = latch;
-  }
-
-  public long getTimeStamp() {
-    return timeStamp;
-  }
-
-  public void setTimeStamp(long timeStamp) {
-    this.timeStamp = timeStamp;
-  }
-
-  public boolean isFirstByteConsumed() {
-    return isFirstByteConsumed;
-  }
-
-  public void setFirstByteConsumed(boolean isFirstByteConsumed) {
-    this.isFirstByteConsumed = isFirstByteConsumed;
-  }
-
-  public boolean isLastByteConsumed() {
-    return isLastByteConsumed;
-  }
-
-  public void setLastByteConsumed(boolean isLastByteConsumed) {
-    this.isLastByteConsumed = isLastByteConsumed;
-  }
-
-  public boolean isAnyByteConsumed() {
-    return isAnyByteConsumed;
-  }
-
-  public void setAnyByteConsumed(boolean isAnyByteConsumed) {
-    this.isAnyByteConsumed = isAnyByteConsumed;
-  }
-
-}

other/java/hdfs2/src/main/java/seaweed/hdfs/ReadBufferManager.java

@@ -1,394 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- * <p>
- * http://www.apache.org/licenses/LICENSE-2.0
- * <p>
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package seaweed.hdfs;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import java.util.Collection;
-import java.util.LinkedList;
-import java.util.Queue;
-import java.util.Stack;
-import java.util.concurrent.CountDownLatch;
-
-/**
- * The Read Buffer Manager for Rest AbfsClient.
- */
-final class ReadBufferManager {
-  private static final Logger LOGGER = LoggerFactory.getLogger(ReadBufferManager.class);
-
-  private static final int NUM_BUFFERS = 16;
-  private static final int BLOCK_SIZE = 4 * 1024 * 1024;
-  private static final int NUM_THREADS = 8;
-  private static final int THRESHOLD_AGE_MILLISECONDS = 3000; // have to see if 3 seconds is a good threshold
-
-  private Thread[] threads = new Thread[NUM_THREADS];
-  private byte[][] buffers;    // array of byte[] buffers, to hold the data that is read
-  private Stack<Integer> freeList = new Stack<>();   // indices in buffers[] array that are available
-
-  private Queue<ReadBuffer> readAheadQueue = new LinkedList<>(); // queue of requests that are not picked up by any worker thread yet
-  private LinkedList<ReadBuffer> inProgressList = new LinkedList<>(); // requests being processed by worker threads
-  private LinkedList<ReadBuffer> completedReadList = new LinkedList<>(); // buffers available for reading
-  private static final ReadBufferManager BUFFER_MANAGER; // singleton, initialized in static initialization block
-
-  static {
-    BUFFER_MANAGER = new ReadBufferManager();
-    BUFFER_MANAGER.init();
-  }
-
-  static ReadBufferManager getBufferManager() {
-    return BUFFER_MANAGER;
-  }
-
-  private void init() {
-    buffers = new byte[NUM_BUFFERS][];
-    for (int i = 0; i < NUM_BUFFERS; i++) {
-      buffers[i] = new byte[BLOCK_SIZE];  // same buffers are reused. The byte array never goes back to GC
-      freeList.add(i);
-    }
-    for (int i = 0; i < NUM_THREADS; i++) {
-      Thread t = new Thread(new ReadBufferWorker(i));
-      t.setDaemon(true);
-      threads[i] = t;
-      t.setName("SeaweedFS-prefetch-" + i);
-      t.start();
-    }
-    ReadBufferWorker.UNLEASH_WORKERS.countDown();
-  }
-
-  // hide instance constructor
-  private ReadBufferManager() {
-  }
-
-
-  /*
-   *
-   *  SeaweedInputStream-facing methods
-   *
-   */
-
-
-  /**
-   * {@link SeaweedInputStream} calls this method to queue read-aheads.
-   *
-   * @param stream          The {@link SeaweedInputStream} for which to do the read-ahead
-   * @param requestedOffset The offset in the file which shoukd be read
-   * @param requestedLength The length to read
-   */
-  void queueReadAhead(final SeaweedInputStream stream, final long requestedOffset, final int requestedLength) {
-    if (LOGGER.isTraceEnabled()) {
-      LOGGER.trace("Start Queueing readAhead for {} offset {} length {}",
-          stream.getPath(), requestedOffset, requestedLength);
-    }
-    ReadBuffer buffer;
-    synchronized (this) {
-      if (isAlreadyQueued(stream, requestedOffset)) {
-        return; // already queued, do not queue again
-      }
-      if (freeList.isEmpty() && !tryEvict()) {
-        return; // no buffers available, cannot queue anything
-      }
-
-      buffer = new ReadBuffer();
-      buffer.setStream(stream);
-      buffer.setOffset(requestedOffset);
-      buffer.setLength(0);
-      buffer.setRequestedLength(requestedLength);
-      buffer.setStatus(ReadBufferStatus.NOT_AVAILABLE);
-      buffer.setLatch(new CountDownLatch(1));
-
-      Integer bufferIndex = freeList.pop();  // will return a value, since we have checked size > 0 already
-
-      buffer.setBuffer(buffers[bufferIndex]);
-      buffer.setBufferindex(bufferIndex);
-      readAheadQueue.add(buffer);
-      notifyAll();
-    }
-    if (LOGGER.isTraceEnabled()) {
-      LOGGER.trace("Done q-ing readAhead for file {} offset {} buffer idx {}",
-          stream.getPath(), requestedOffset, buffer.getBufferindex());
-    }
-  }
-
-
-  /**
-   * {@link SeaweedInputStream} calls this method read any bytes already available in a buffer (thereby saving a
-   * remote read). This returns the bytes if the data already exists in buffer. If there is a buffer that is reading
-   * the requested offset, then this method blocks until that read completes. If the data is queued in a read-ahead
-   * but not picked up by a worker thread yet, then it cancels that read-ahead and reports cache miss. This is because
-   * depending on worker thread availability, the read-ahead may take a while - the calling thread can do it's own
-   * read to get the data faster (copmared to the read waiting in queue for an indeterminate amount of time).
-   *
-   * @param stream   the file to read bytes for
-   * @param position the offset in the file to do a read for
-   * @param length   the length to read
-   * @param buffer   the buffer to read data into. Note that the buffer will be written into from offset 0.
-   * @return the number of bytes read
-   */
-  int getBlock(final SeaweedInputStream stream, final long position, final int length, final byte[] buffer) {
-    // not synchronized, so have to be careful with locking
-    if (LOGGER.isTraceEnabled()) {
-      LOGGER.trace("getBlock for file {}  position {}  thread {}",
-          stream.getPath(), position, Thread.currentThread().getName());
-    }
-
-    waitForProcess(stream, position);
-
-    int bytesRead = 0;
-    synchronized (this) {
-      bytesRead = getBlockFromCompletedQueue(stream, position, length, buffer);
-    }
-    if (bytesRead > 0) {
-      if (LOGGER.isTraceEnabled()) {
-        LOGGER.trace("Done read from Cache for {} position {} length {}",
-            stream.getPath(), position, bytesRead);
-      }
-      return bytesRead;
-    }
-
-    // otherwise, just say we got nothing - calling thread can do its own read
-    return 0;
-  }
-
-  /*
-   *
-   *  Internal methods
-   *
-   */
-
-  private void waitForProcess(final SeaweedInputStream stream, final long position) {
-    ReadBuffer readBuf;
-    synchronized (this) {
-      clearFromReadAheadQueue(stream, position);
-      readBuf = getFromList(inProgressList, stream, position);
-    }
-    if (readBuf != null) {         // if in in-progress queue, then block for it
-      try {
-        if (LOGGER.isTraceEnabled()) {
-          LOGGER.trace("got a relevant read buffer for file {} offset {} buffer idx {}",
-              stream.getPath(), readBuf.getOffset(), readBuf.getBufferindex());
-        }
-        readBuf.getLatch().await();  // blocking wait on the caller stream's thread
-        // Note on correctness: readBuf gets out of inProgressList only in 1 place: after worker thread
-        // is done processing it (in doneReading). There, the latch is set after removing the buffer from
-        // inProgressList. So this latch is safe to be outside the synchronized block.
-        // Putting it in synchronized would result in a deadlock, since this thread would be holding the lock
-        // while waiting, so no one will be able to  change any state. If this becomes more complex in the future,
-        // then the latch cane be removed and replaced with wait/notify whenever inProgressList is touched.
-      } catch (InterruptedException ex) {
-        Thread.currentThread().interrupt();
-      }
-      if (LOGGER.isTraceEnabled()) {
-        LOGGER.trace("latch done for file {} buffer idx {} length {}",
-            stream.getPath(), readBuf.getBufferindex(), readBuf.getLength());
-      }
-    }
-  }
-
-  /**
-   * If any buffer in the completedlist can be reclaimed then reclaim it and return the buffer to free list.
-   * The objective is to find just one buffer - there is no advantage to evicting more than one.
-   *
-   * @return whether the eviction succeeeded - i.e., were we able to free up one buffer
-   */
-  private synchronized boolean tryEvict() {
-    ReadBuffer nodeToEvict = null;
-    if (completedReadList.size() <= 0) {
-      return false;  // there are no evict-able buffers
-    }
-
-    // first, try buffers where all bytes have been consumed (approximated as first and last bytes consumed)
-    for (ReadBuffer buf : completedReadList) {
-      if (buf.isFirstByteConsumed() && buf.isLastByteConsumed()) {
-        nodeToEvict = buf;
-        break;
-      }
-    }
-    if (nodeToEvict != null) {
-      return evict(nodeToEvict);
-    }
-
-    // next, try buffers where any bytes have been consumed (may be a bad idea? have to experiment and see)
-    for (ReadBuffer buf : completedReadList) {
-      if (buf.isAnyByteConsumed()) {
-        nodeToEvict = buf;
-        break;
-      }
-    }
-
-    if (nodeToEvict != null) {
-      return evict(nodeToEvict);
-    }
-
-    // next, try any old nodes that have not been consumed
-    long earliestBirthday = Long.MAX_VALUE;
-    for (ReadBuffer buf : completedReadList) {
-      if (buf.getTimeStamp() < earliestBirthday) {
-        nodeToEvict = buf;
-        earliestBirthday = buf.getTimeStamp();
-      }
-    }
-    if ((currentTimeMillis() - earliestBirthday > THRESHOLD_AGE_MILLISECONDS) && (nodeToEvict != null)) {
-      return evict(nodeToEvict);
-    }
-
-    // nothing can be evicted
-    return false;
-  }
-
-  private boolean evict(final ReadBuffer buf) {
-    freeList.push(buf.getBufferindex());
-    completedReadList.remove(buf);
-    if (LOGGER.isTraceEnabled()) {
-      LOGGER.trace("Evicting buffer idx {}; was used for file {} offset {} length {}",
-          buf.getBufferindex(), buf.getStream().getPath(), buf.getOffset(), buf.getLength());
-    }
-    return true;
-  }
-
-  private boolean isAlreadyQueued(final SeaweedInputStream stream, final long requestedOffset) {
-    // returns true if any part of the buffer is already queued
-    return (isInList(readAheadQueue, stream, requestedOffset)
-        || isInList(inProgressList, stream, requestedOffset)
-        || isInList(completedReadList, stream, requestedOffset));
-  }
-
-  private boolean isInList(final Collection<ReadBuffer> list, final SeaweedInputStream stream, final long requestedOffset) {
-    return (getFromList(list, stream, requestedOffset) != null);
-  }
-
-  private ReadBuffer getFromList(final Collection<ReadBuffer> list, final SeaweedInputStream stream, final long requestedOffset) {
-    for (ReadBuffer buffer : list) {
-      if (buffer.getStream() == stream) {
-        if (buffer.getStatus() == ReadBufferStatus.AVAILABLE
-            && requestedOffset >= buffer.getOffset()
-            && requestedOffset < buffer.getOffset() + buffer.getLength()) {
-          return buffer;
-        } else if (requestedOffset >= buffer.getOffset()
-            && requestedOffset < buffer.getOffset() + buffer.getRequestedLength()) {
-          return buffer;
-        }
-      }
-    }
-    return null;
-  }
-
-  private void clearFromReadAheadQueue(final SeaweedInputStream stream, final long requestedOffset) {
-    ReadBuffer buffer = getFromList(readAheadQueue, stream, requestedOffset);
-    if (buffer != null) {
-      readAheadQueue.remove(buffer);
-      notifyAll();   // lock is held in calling method
-      freeList.push(buffer.getBufferindex());
-    }
-  }
-
-  private int getBlockFromCompletedQueue(final SeaweedInputStream stream, final long position, final int length,
-                                         final byte[] buffer) {
-    ReadBuffer buf = getFromList(completedReadList, stream, position);
-    if (buf == null || position >= buf.getOffset() + buf.getLength()) {
-      return 0;
-    }
-    int cursor = (int) (position - buf.getOffset());
-    int availableLengthInBuffer = buf.getLength() - cursor;
-    int lengthToCopy = Math.min(length, availableLengthInBuffer);
-    System.arraycopy(buf.getBuffer(), cursor, buffer, 0, lengthToCopy);
-    if (cursor == 0) {
-      buf.setFirstByteConsumed(true);
-    }
-    if (cursor + lengthToCopy == buf.getLength()) {
-      buf.setLastByteConsumed(true);
-    }
-    buf.setAnyByteConsumed(true);
-    return lengthToCopy;
-  }
-
-  /*
-   *
-   *  ReadBufferWorker-thread-facing methods
-   *
-   */
-
-  /**
-   * ReadBufferWorker thread calls this to get the next buffer that it should work on.
-   *
-   * @return {@link ReadBuffer}
-   * @throws InterruptedException if thread is interrupted
-   */
-  ReadBuffer getNextBlockToRead() throws InterruptedException {
-    ReadBuffer buffer = null;
-    synchronized (this) {
-      //buffer = readAheadQueue.take();  // blocking method
-      while (readAheadQueue.size() == 0) {
-        wait();
-      }
-      buffer = readAheadQueue.remove();
-      notifyAll();
-      if (buffer == null) {
-        return null;            // should never happen
-      }
-      buffer.setStatus(ReadBufferStatus.READING_IN_PROGRESS);
-      inProgressList.add(buffer);
-    }
-    if (LOGGER.isTraceEnabled()) {
-      LOGGER.trace("ReadBufferWorker picked file {} for offset {}",
-          buffer.getStream().getPath(), buffer.getOffset());
-    }
-    return buffer;
-  }
-
-  /**
-   * ReadBufferWorker thread calls this method to post completion.
-   *
-   * @param buffer            the buffer whose read was completed
-   * @param result            the {@link ReadBufferStatus} after the read operation in the worker thread
-   * @param bytesActuallyRead the number of bytes that the worker thread was actually able to read
-   */
-  void doneReading(final ReadBuffer buffer, final ReadBufferStatus result, final int bytesActuallyRead) {
-    if (LOGGER.isTraceEnabled()) {
-      LOGGER.trace("ReadBufferWorker completed file {} for offset {} bytes {}",
-          buffer.getStream().getPath(),  buffer.getOffset(), bytesActuallyRead);
-    }
-    synchronized (this) {
-      inProgressList.remove(buffer);
-      if (result == ReadBufferStatus.AVAILABLE && bytesActuallyRead > 0) {
-        buffer.setStatus(ReadBufferStatus.AVAILABLE);
-        buffer.setTimeStamp(currentTimeMillis());
-        buffer.setLength(bytesActuallyRead);
-        completedReadList.add(buffer);
-      } else {
-        freeList.push(buffer.getBufferindex());
-        // buffer should go out of scope after the end of the calling method in ReadBufferWorker, and eligible for GC
-      }
-    }
-    //outside the synchronized, since anyone receiving a wake-up from the latch must see safe-published results
-    buffer.getLatch().countDown(); // wake up waiting threads (if any)
-  }
-
-  /**
-   * Similar to System.currentTimeMillis, except implemented with System.nanoTime().
-   * System.currentTimeMillis can go backwards when system clock is changed (e.g., with NTP time synchronization),
-   * making it unsuitable for measuring time intervals. nanotime is strictly monotonically increasing per CPU core.
-   * Note: it is not monotonic across Sockets, and even within a CPU, its only the
-   * more recent parts which share a clock across all cores.
-   *
-   * @return current time in milliseconds
-   */
-  private long currentTimeMillis() {
-    return System.nanoTime() / 1000 / 1000;
-  }
-}

other/java/hdfs2/src/main/java/seaweed/hdfs/ReadBufferWorker.java

@@ -1,70 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package seaweed.hdfs;
-
-import java.util.concurrent.CountDownLatch;
-
-class ReadBufferWorker implements Runnable {
-
-  protected static final CountDownLatch UNLEASH_WORKERS = new CountDownLatch(1);
-  private int id;
-
-  ReadBufferWorker(final int id) {
-    this.id = id;
-  }
-
-  /**
-   * return the ID of ReadBufferWorker.
-   */
-  public int getId() {
-    return this.id;
-  }
-
-  /**
-   * Waits until a buffer becomes available in ReadAheadQueue.
-   * Once a buffer becomes available, reads the file specified in it and then posts results back to buffer manager.
-   * Rinse and repeat. Forever.
-   */
-  public void run() {
-    try {
-      UNLEASH_WORKERS.await();
-    } catch (InterruptedException ex) {
-      Thread.currentThread().interrupt();
-    }
-    ReadBufferManager bufferManager = ReadBufferManager.getBufferManager();
-    ReadBuffer buffer;
-    while (true) {
-      try {
-        buffer = bufferManager.getNextBlockToRead();   // blocks, until a buffer is available for this thread
-      } catch (InterruptedException ex) {
-        Thread.currentThread().interrupt();
-        return;
-      }
-      if (buffer != null) {
-        try {
-          // do the actual read, from the file.
-          int bytesRead = buffer.getStream().readRemote(buffer.getOffset(), buffer.getBuffer(), 0, buffer.getRequestedLength());
-          bufferManager.doneReading(buffer, ReadBufferStatus.AVAILABLE, bytesRead);  // post result back to ReadBufferManager
-        } catch (Exception ex) {
-          bufferManager.doneReading(buffer, ReadBufferStatus.READ_FAILED, 0);
-        }
-      }
-    }
-  }
-}

other/java/hdfs2/src/main/java/seaweed/hdfs/SeaweedAbstractFileSystem.java

@@ -18,12 +18,18 @@
 
 package seaweed.hdfs;
 
-/**
- * The ReadBufferStatus for Rest AbfsClient
- */
-public enum ReadBufferStatus {
-  NOT_AVAILABLE,  // buffers sitting in readaheadqueue have this stats
-  READING_IN_PROGRESS,  // reading is in progress on this buffer. Buffer should be in inProgressList
-  AVAILABLE,  // data is available in buffer. It should be in completedList
-  READ_FAILED  // read completed, but failed.
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.DelegateToFileSystem;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.URISyntaxException;
+
+public class SeaweedAbstractFileSystem extends DelegateToFileSystem {
+
+    SeaweedAbstractFileSystem(final URI uri, final Configuration conf)
+            throws IOException, URISyntaxException {
+        super(uri, new SeaweedFileSystem(), conf, "seaweedfs", false);
+    }
+
 }

other/java/hdfs2/src/main/java/seaweed/hdfs/SeaweedFileSystem.java

@@ -5,31 +5,29 @@ import org.apache.hadoop.fs.*;
 import org.apache.hadoop.fs.permission.AclEntry;
 import org.apache.hadoop.fs.permission.AclStatus;
 import org.apache.hadoop.fs.permission.FsPermission;
-import org.apache.hadoop.security.AccessControlException;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.util.Progressable;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import seaweedfs.client.FilerProto;
 
 import java.io.FileNotFoundException;
 import java.io.IOException;
-import java.io.InputStream;
 import java.io.OutputStream;
 import java.net.URI;
 import java.util.EnumSet;
 import java.util.List;
 import java.util.Map;
 
-import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.IO_FILE_BUFFER_SIZE_KEY;
+public class SeaweedFileSystem extends FileSystem {
 
-public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
-
-    public static final int FS_SEAWEED_DEFAULT_PORT = 8888;
     public static final String FS_SEAWEED_FILER_HOST = "fs.seaweed.filer.host";
     public static final String FS_SEAWEED_FILER_PORT = "fs.seaweed.filer.port";
+    public static final int FS_SEAWEED_DEFAULT_PORT = 8888;
+    public static final String FS_SEAWEED_BUFFER_SIZE = "fs.seaweed.buffer.size";
+    public static final int FS_SEAWEED_DEFAULT_BUFFER_SIZE = 4 * 1024 * 1024;
 
     private static final Logger LOG = LoggerFactory.getLogger(SeaweedFileSystem.class);
-    private static int BUFFER_SIZE = 16 * 1024 * 1024;
 
     private URI uri;
     private Path workingDirectory = new Path("/");
@@ -60,8 +58,6 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
         port = (port == -1) ? FS_SEAWEED_DEFAULT_PORT : port;
         conf.setInt(FS_SEAWEED_FILER_PORT, port);
 
-        conf.setInt(IO_FILE_BUFFER_SIZE_KEY, BUFFER_SIZE);
-
         setConf(conf);
         this.uri = uri;
 
@@ -77,8 +73,9 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
         path = qualify(path);
 
         try {
-            InputStream inputStream = seaweedFileSystemStore.openFileForRead(path, statistics, bufferSize);
-            return new FSDataInputStream(inputStream);
+            int seaweedBufferSize = this.getConf().getInt(FS_SEAWEED_BUFFER_SIZE, FS_SEAWEED_DEFAULT_BUFFER_SIZE);
+            FSInputStream inputStream = seaweedFileSystemStore.openFileForRead(path, statistics, seaweedBufferSize);
+            return new FSDataInputStream(new BufferedFSInputStream(inputStream, 4 * seaweedBufferSize));
         } catch (Exception ex) {
             LOG.warn("open path: {} bufferSize:{}", path, bufferSize, ex);
             return null;
@@ -95,7 +92,8 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
 
         try {
             String replicaPlacement = String.format("%03d", replication - 1);
-            OutputStream outputStream = seaweedFileSystemStore.createFile(path, overwrite, permission, bufferSize, replicaPlacement);
+            int seaweedBufferSize = this.getConf().getInt(FS_SEAWEED_BUFFER_SIZE, FS_SEAWEED_DEFAULT_BUFFER_SIZE);
+            OutputStream outputStream = seaweedFileSystemStore.createFile(path, overwrite, permission, seaweedBufferSize, replicaPlacement);
             return new FSDataOutputStream(outputStream, statistics);
         } catch (Exception ex) {
             LOG.warn("create path: {} bufferSize:{} blockSize:{}", path, bufferSize, blockSize, ex);
@@ -105,8 +103,9 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
 
     /**
      * {@inheritDoc}
+     *
      * @throws FileNotFoundException if the parent directory is not present -or
-     * is not a directory.
+     *                               is not a directory.
      */
     @Override
     public FSDataOutputStream createNonRecursive(Path path,
@@ -123,9 +122,10 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
                 throw new FileAlreadyExistsException("Not a directory: " + parent);
             }
         }
+        int seaweedBufferSize = this.getConf().getInt(FS_SEAWEED_BUFFER_SIZE, FS_SEAWEED_DEFAULT_BUFFER_SIZE);
         return create(path, permission,
                 flags.contains(CreateFlag.OVERWRITE), bufferSize,
-                replication, blockSize, progress);
+                replication, seaweedBufferSize, progress);
     }
 
     @Override
@@ -135,7 +135,8 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
 
         path = qualify(path);
         try {
-            OutputStream outputStream = seaweedFileSystemStore.createFile(path, false, null, bufferSize, "");
+            int seaweedBufferSize = this.getConf().getInt(FS_SEAWEED_BUFFER_SIZE, FS_SEAWEED_DEFAULT_BUFFER_SIZE);
+            OutputStream outputStream = seaweedFileSystemStore.createFile(path, false, null, seaweedBufferSize, "");
             return new FSDataOutputStream(outputStream, statistics);
         } catch (Exception ex) {
             LOG.warn("append path: {} bufferSize:{}", path, bufferSize, ex);
@@ -144,7 +145,7 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
     }
 
     @Override
-    public boolean rename(Path src, Path dst) {
+    public boolean rename(Path src, Path dst) throws IOException {
 
         LOG.debug("rename path: {} => {}", src, dst);
 
@@ -155,12 +156,13 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
         if (src.equals(dst)) {
             return true;
         }
-        FileStatus dstFileStatus = getFileStatus(dst);
+        FilerProto.Entry entry = seaweedFileSystemStore.lookupEntry(dst);
 
-        String sourceFileName = src.getName();
         Path adjustedDst = dst;
 
-        if (dstFileStatus != null) {
+        if (entry != null) {
+            FileStatus dstFileStatus = getFileStatus(dst);
+            String sourceFileName = src.getName();
             if (!dstFileStatus.isDirectory()) {
                 return false;
             }
@@ -175,18 +177,20 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
     }
 
     @Override
-    public boolean delete(Path path, boolean recursive) {
+    public boolean delete(Path path, boolean recursive) throws IOException {
 
         LOG.debug("delete path: {} recursive:{}", path, recursive);
 
         path = qualify(path);
 
-        FileStatus fileStatus = getFileStatus(path);
+        FilerProto.Entry entry = seaweedFileSystemStore.lookupEntry(path);
 
-        if (fileStatus == null) {
+        if (entry == null) {
             return true;
         }
 
+        FileStatus fileStatus = getFileStatus(path);
+
         return seaweedFileSystemStore.deleteEntries(path, fileStatus.isDirectory(), recursive);
 
     }
@@ -222,9 +226,9 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
 
         path = qualify(path);
 
-        FileStatus fileStatus = getFileStatus(path);
+        FilerProto.Entry entry = seaweedFileSystemStore.lookupEntry(path);
 
-        if (fileStatus == null) {
+        if (entry == null) {
 
             UserGroupInformation currentUser = UserGroupInformation.getCurrentUser();
             return seaweedFileSystemStore.createDirectory(path, currentUser,
@@ -233,6 +237,8 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
 
         }
 
+        FileStatus fileStatus = getFileStatus(path);
+
         if (fileStatus.isDirectory()) {
             return true;
         } else {
@@ -241,7 +247,7 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
     }
 
     @Override
-    public FileStatus getFileStatus(Path path) {
+    public FileStatus getFileStatus(Path path) throws IOException {
 
         LOG.debug("getFileStatus path: {}", path);
 
@@ -335,9 +341,7 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
 
     @Override
     public void createSymlink(final Path target, final Path link,
-                              final boolean createParent) throws AccessControlException,
-            FileAlreadyExistsException, FileNotFoundException,
-            ParentNotDirectoryException, UnsupportedFileSystemException,
+                              final boolean createParent) throws
             IOException {
         // Supporting filesystems should override this method
         throw new UnsupportedOperationException(

other/java/hdfs2/src/main/java/seaweed/hdfs/SeaweedFileSystemStore.java

@@ -1,5 +1,6 @@
 package seaweed.hdfs;
 
+import org.apache.hadoop.fs.FSInputStream;
 import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
@@ -7,14 +8,10 @@ import org.apache.hadoop.fs.permission.FsPermission;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import seaweedfs.client.FilerClient;
-import seaweedfs.client.FilerGrpcClient;
-import seaweedfs.client.FilerProto;
-import seaweedfs.client.SeaweedRead;
+import seaweedfs.client.*;
 
 import java.io.FileNotFoundException;
 import java.io.IOException;
-import java.io.InputStream;
 import java.io.OutputStream;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -61,9 +58,19 @@ public class SeaweedFileSystemStore {
         );
     }
 
-    public FileStatus[] listEntries(final Path path) {
+    public FileStatus[] listEntries(final Path path) throws IOException {
         LOG.debug("listEntries path: {}", path);
 
+        FileStatus pathStatus = getFileStatus(path);
+
+        if (pathStatus == null) {
+            return new FileStatus[0];
+        }
+
+        if (!pathStatus.isDirectory()) {
+            return new FileStatus[]{pathStatus};
+        }
+
         List<FileStatus> fileStatuses = new ArrayList<FileStatus>();
 
         List<FilerProto.Entry> entries = filerClient.listEntries(path.toUri().getPath());
@@ -74,14 +81,16 @@ public class SeaweedFileSystemStore {
 
             fileStatuses.add(fileStatus);
         }
+        LOG.debug("listEntries path: {} size {}", fileStatuses, fileStatuses.size());
         return fileStatuses.toArray(new FileStatus[0]);
+
     }
 
-    public FileStatus getFileStatus(final Path path) {
+    public FileStatus getFileStatus(final Path path) throws IOException {
 
         FilerProto.Entry entry = lookupEntry(path);
         if (entry == null) {
-            return null;
+            throw new FileNotFoundException("File does not exist: " + path);
         }
         LOG.debug("doGetFileStatus path:{} entry:{}", path, entry);
 
@@ -111,7 +120,7 @@ public class SeaweedFileSystemStore {
 
     private FileStatus doGetFileStatus(Path path, FilerProto.Entry entry) {
         FilerProto.FuseAttributes attributes = entry.getAttributes();
-        long length = SeaweedRead.totalSize(entry.getChunksList());
+        long length = SeaweedRead.fileSize(entry);
         boolean isDir = entry.getIsDirectory();
         int block_replication = 1;
         int blocksize = 512;
@@ -124,7 +133,7 @@ public class SeaweedFileSystemStore {
             modification_time, access_time, permission, owner, group, null, path);
     }
 
-    private FilerProto.Entry lookupEntry(Path path) {
+    public FilerProto.Entry lookupEntry(Path path) {
 
         return filerClient.lookupEntry(getParentDirectory(path), path.getName());
 
@@ -172,7 +181,7 @@ public class SeaweedFileSystemStore {
                 entry.mergeFrom(existingEntry);
                 entry.getAttributesBuilder().setMtime(now);
                 LOG.debug("createFile merged entry path:{} entry:{} from:{}", path, entry, existingEntry);
-                writePosition = SeaweedRead.totalSize(existingEntry.getChunksList());
+                writePosition = SeaweedRead.fileSize(existingEntry);
                 replication = existingEntry.getAttributes().getReplication();
             }
         }
@@ -189,18 +198,18 @@ public class SeaweedFileSystemStore {
                     .clearGroupName()
                     .addAllGroupName(Arrays.asList(userGroupInformation.getGroupNames()))
                 );
+            SeaweedWrite.writeMeta(filerGrpcClient, getParentDirectory(path), entry);
         }
 
         return new SeaweedOutputStream(filerGrpcClient, path, entry, writePosition, bufferSize, replication);
 
     }
 
-    public InputStream openFileForRead(final Path path, FileSystem.Statistics statistics,
-                                       int bufferSize) throws IOException {
+    public FSInputStream openFileForRead(final Path path, FileSystem.Statistics statistics,
+                                         int bufferSize) throws IOException {
 
         LOG.debug("openFileForRead path:{} bufferSize:{}", path, bufferSize);
 
-        int readAheadQueueDepth = 2;
         FilerProto.Entry entry = lookupEntry(path);
 
         if (entry == null) {
@@ -211,8 +220,7 @@ public class SeaweedFileSystemStore {
             statistics,
             path.toUri().getPath(),
             entry,
-            bufferSize,
-            readAheadQueueDepth);
+            bufferSize);
     }
 
     public void setOwner(Path path, String owner, String group) {

other/java/hdfs2/src/main/java/seaweed/hdfs/SeaweedInputStream.java

@@ -2,7 +2,6 @@ package seaweed.hdfs;
 
 // based on org.apache.hadoop.fs.azurebfs.services.AbfsInputStream
 
-import com.google.common.base.Preconditions;
 import org.apache.hadoop.fs.FSExceptionMessages;
 import org.apache.hadoop.fs.FSInputStream;
 import org.apache.hadoop.fs.FileSystem.Statistics;
@@ -27,35 +26,25 @@ public class SeaweedInputStream extends FSInputStream {
     private final List<SeaweedRead.VisibleInterval> visibleIntervalList;
     private final long contentLength;
     private final int bufferSize; // default buffer size
-    private final int readAheadQueueDepth;         // initialized in constructor
-    private final boolean readAheadEnabled; // whether enable readAhead;
 
-    private byte[] buffer = null;            // will be initialized on first use
+    private long position = 0;  // cursor of the file
 
-    private long fCursor = 0;  // cursor of buffer within file - offset of next byte to read from remote server
-    private long fCursorAfterLastRead = -1;
-    private int bCursor = 0;   // cursor of read within buffer - offset of next byte to be returned from buffer
-    private int limit = 0;     // offset of next byte to be read into buffer from service (i.e., upper marker+1
-    //                                                      of valid bytes in buffer)
     private boolean closed = false;
 
     public SeaweedInputStream(
-        final FilerGrpcClient filerGrpcClient,
-        final Statistics statistics,
-        final String path,
-        final FilerProto.Entry entry,
-        final int bufferSize,
-        final int readAheadQueueDepth) {
+            final FilerGrpcClient filerGrpcClient,
+            final Statistics statistics,
+            final String path,
+            final FilerProto.Entry entry,
+            final int bufferSize) throws IOException {
         this.filerGrpcClient = filerGrpcClient;
         this.statistics = statistics;
         this.path = path;
         this.entry = entry;
-        this.contentLength = SeaweedRead.totalSize(entry.getChunksList());
+        this.contentLength = SeaweedRead.fileSize(entry);
         this.bufferSize = bufferSize;
-        this.readAheadQueueDepth = (readAheadQueueDepth >= 0) ? readAheadQueueDepth : Runtime.getRuntime().availableProcessors();
-        this.readAheadEnabled = true;
 
-        this.visibleIntervalList = SeaweedRead.nonOverlappingVisibleIntervals(entry.getChunksList());
+        this.visibleIntervalList = SeaweedRead.nonOverlappingVisibleIntervals(filerGrpcClient, entry.getChunksList());
 
         LOG.debug("new path:{} entry:{} visibleIntervalList:{}", path, entry, visibleIntervalList);
 
@@ -78,122 +67,7 @@ public class SeaweedInputStream extends FSInputStream {
 
     @Override
     public synchronized int read(final byte[] b, final int off, final int len) throws IOException {
-        int currentOff = off;
-        int currentLen = len;
-        int lastReadBytes;
-        int totalReadBytes = 0;
-        do {
-            lastReadBytes = readOneBlock(b, currentOff, currentLen);
-            if (lastReadBytes > 0) {
-                currentOff += lastReadBytes;
-                currentLen -= lastReadBytes;
-                totalReadBytes += lastReadBytes;
-            }
-            if (currentLen <= 0 || currentLen > b.length - currentOff) {
-                break;
-            }
-        } while (lastReadBytes > 0);
-        return totalReadBytes > 0 ? totalReadBytes : lastReadBytes;
-    }
 
-    private int readOneBlock(final byte[] b, final int off, final int len) throws IOException {
-        if (closed) {
-            throw new IOException(FSExceptionMessages.STREAM_IS_CLOSED);
-        }
-
-        Preconditions.checkNotNull(b);
-
-        if (len == 0) {
-            return 0;
-        }
-
-        if (this.available() == 0) {
-            return -1;
-        }
-
-        if (off < 0 || len < 0 || len > b.length - off) {
-            throw new IndexOutOfBoundsException();
-        }
-
-        //If buffer is empty, then fill the buffer.
-        if (bCursor == limit) {
-            //If EOF, then return -1
-            if (fCursor >= contentLength) {
-                return -1;
-            }
-
-            long bytesRead = 0;
-            //reset buffer to initial state - i.e., throw away existing data
-            bCursor = 0;
-            limit = 0;
-            if (buffer == null) {
-                buffer = new byte[bufferSize];
-            }
-
-            // Enable readAhead when reading sequentially
-            if (-1 == fCursorAfterLastRead || fCursorAfterLastRead == fCursor || b.length >= bufferSize) {
-                bytesRead = readInternal(fCursor, buffer, 0, bufferSize, false);
-            } else {
-                bytesRead = readInternal(fCursor, buffer, 0, b.length, true);
-            }
-
-            if (bytesRead == -1) {
-                return -1;
-            }
-
-            limit += bytesRead;
-            fCursor += bytesRead;
-            fCursorAfterLastRead = fCursor;
-        }
-
-        //If there is anything in the buffer, then return lesser of (requested bytes) and (bytes in buffer)
-        //(bytes returned may be less than requested)
-        int bytesRemaining = limit - bCursor;
-        int bytesToRead = Math.min(len, bytesRemaining);
-        System.arraycopy(buffer, bCursor, b, off, bytesToRead);
-        bCursor += bytesToRead;
-        if (statistics != null) {
-            statistics.incrementBytesRead(bytesToRead);
-        }
-        return bytesToRead;
-    }
-
-
-    private int readInternal(final long position, final byte[] b, final int offset, final int length,
-                             final boolean bypassReadAhead) throws IOException {
-        if (readAheadEnabled && !bypassReadAhead) {
-            // try reading from read-ahead
-            if (offset != 0) {
-                throw new IllegalArgumentException("readahead buffers cannot have non-zero buffer offsets");
-            }
-            int receivedBytes;
-
-            // queue read-aheads
-            int numReadAheads = this.readAheadQueueDepth;
-            long nextSize;
-            long nextOffset = position;
-            while (numReadAheads > 0 && nextOffset < contentLength) {
-                nextSize = Math.min((long) bufferSize, contentLength - nextOffset);
-                ReadBufferManager.getBufferManager().queueReadAhead(this, nextOffset, (int) nextSize);
-                nextOffset = nextOffset + nextSize;
-                numReadAheads--;
-            }
-
-            // try reading from buffers first
-            receivedBytes = ReadBufferManager.getBufferManager().getBlock(this, position, length, b);
-            if (receivedBytes > 0) {
-                return receivedBytes;
-            }
-
-            // got nothing from read-ahead, do our own read now
-            receivedBytes = readRemote(position, b, offset, length);
-            return receivedBytes;
-        } else {
-            return readRemote(position, b, offset, length);
-        }
-    }
-
-    int readRemote(long position, byte[] b, int offset, int length) throws IOException {
         if (position < 0) {
             throw new IllegalArgumentException("attempting to read from negative offset");
         }
@@ -203,21 +77,30 @@ public class SeaweedInputStream extends FSInputStream {
         if (b == null) {
             throw new IllegalArgumentException("null byte array passed in to read() method");
         }
-        if (offset >= b.length) {
+        if (off >= b.length) {
             throw new IllegalArgumentException("offset greater than length of array");
         }
-        if (length < 0) {
+        if (len < 0) {
             throw new IllegalArgumentException("requested read length is less than zero");
         }
-        if (length > (b.length - offset)) {
+        if (len > (b.length - off)) {
             throw new IllegalArgumentException("requested read length is more than will fit after requested offset in buffer");
         }
 
-        long bytesRead = SeaweedRead.read(filerGrpcClient, visibleIntervalList, position, b, offset, length);
+        long bytesRead = SeaweedRead.read(this.filerGrpcClient, this.visibleIntervalList, this.position, b, off, len, SeaweedRead.fileSize(entry));
         if (bytesRead > Integer.MAX_VALUE) {
             throw new IOException("Unexpected Content-Length");
         }
+
+        if (bytesRead > 0) {
+            this.position += bytesRead;
+            if (statistics != null) {
+                statistics.incrementBytesRead(bytesRead);
+            }
+        }
+
         return (int) bytesRead;
+
     }
 
     /**
@@ -239,17 +122,8 @@ public class SeaweedInputStream extends FSInputStream {
             throw new EOFException(FSExceptionMessages.CANNOT_SEEK_PAST_EOF);
         }
 
-        if (n >= fCursor - limit && n <= fCursor) { // within buffer
-            bCursor = (int) (n - (fCursor - limit));
-            return;
-        }
+        this.position = n;
 
-        // next read will read from here
-        fCursor = n;
-
-        //invalidate buffer
-        limit = 0;
-        bCursor = 0;
     }
 
     @Override
@@ -257,20 +131,19 @@ public class SeaweedInputStream extends FSInputStream {
         if (closed) {
             throw new IOException(FSExceptionMessages.STREAM_IS_CLOSED);
         }
-        long currentPos = getPos();
-        if (currentPos == contentLength) {
+        if (this.position == contentLength) {
             if (n > 0) {
                 throw new EOFException(FSExceptionMessages.CANNOT_SEEK_PAST_EOF);
             }
         }
-        long newPos = currentPos + n;
+        long newPos = this.position + n;
         if (newPos < 0) {
             newPos = 0;
-            n = newPos - currentPos;
+            n = newPos - this.position;
         }
         if (newPos > contentLength) {
             newPos = contentLength;
-            n = newPos - currentPos;
+            n = newPos - this.position;
         }
         seek(newPos);
         return n;
@@ -289,11 +162,11 @@ public class SeaweedInputStream extends FSInputStream {
     public synchronized int available() throws IOException {
         if (closed) {
             throw new IOException(
-                FSExceptionMessages.STREAM_IS_CLOSED);
+                    FSExceptionMessages.STREAM_IS_CLOSED);
         }
         final long remaining = this.contentLength - this.getPos();
         return remaining <= Integer.MAX_VALUE
-            ? (int) remaining : Integer.MAX_VALUE;
+                ? (int) remaining : Integer.MAX_VALUE;
     }
 
     /**
@@ -321,7 +194,7 @@ public class SeaweedInputStream extends FSInputStream {
         if (closed) {
             throw new IOException(FSExceptionMessages.STREAM_IS_CLOSED);
         }
-        return fCursor - limit + bCursor;
+        return position;
     }
 
     /**
@@ -338,7 +211,6 @@ public class SeaweedInputStream extends FSInputStream {
     @Override
     public synchronized void close() throws IOException {
         closed = true;
-        buffer = null; // de-reference the buffer so it can be GC'ed sooner
     }
 
     /**

other/java/hdfs2/src/main/java/seaweed/hdfs/SeaweedOutputStream.java

@@ -7,6 +7,7 @@ import org.apache.hadoop.fs.FSExceptionMessages;
 import org.apache.hadoop.fs.Path;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import seaweedfs.client.ByteBufferPool;
 import seaweedfs.client.FilerGrpcClient;
 import seaweedfs.client.FilerProto;
 import seaweedfs.client.SeaweedWrite;
@@ -14,6 +15,7 @@ import seaweedfs.client.SeaweedWrite;
 import java.io.IOException;
 import java.io.InterruptedIOException;
 import java.io.OutputStream;
+import java.nio.ByteBuffer;
 import java.util.concurrent.*;
 
 import static seaweed.hdfs.SeaweedFileSystemStore.getParentDirectory;
@@ -28,16 +30,16 @@ public class SeaweedOutputStream extends OutputStream {
     private final int maxConcurrentRequestCount;
     private final ThreadPoolExecutor threadExecutor;
     private final ExecutorCompletionService<Void> completionService;
-    private FilerProto.Entry.Builder entry;
+    private final FilerProto.Entry.Builder entry;
+    private final boolean supportFlush = false; // true;
+    private final ConcurrentLinkedDeque<WriteOperation> writeOperations;
     private long position;
     private boolean closed;
-    private boolean supportFlush = true;
     private volatile IOException lastError;
     private long lastFlushOffset;
     private long lastTotalAppendOffset = 0;
-    private byte[] buffer;
-    private int bufferIndex;
-    private ConcurrentLinkedDeque<WriteOperation> writeOperations;
+    private ByteBuffer buffer;
+    private long outputIndex;
     private String replication = "000";
 
     public SeaweedOutputStream(FilerGrpcClient filerGrpcClient, final Path path, FilerProto.Entry.Builder entry,
@@ -50,18 +52,18 @@ public class SeaweedOutputStream extends OutputStream {
         this.lastError = null;
         this.lastFlushOffset = 0;
         this.bufferSize = bufferSize;
-        this.buffer = new byte[bufferSize];
-        this.bufferIndex = 0;
+        this.buffer = ByteBufferPool.request(bufferSize);
+        this.outputIndex = 0;
         this.writeOperations = new ConcurrentLinkedDeque<>();
 
-        this.maxConcurrentRequestCount = 4 * Runtime.getRuntime().availableProcessors();
+        this.maxConcurrentRequestCount = Runtime.getRuntime().availableProcessors();
 
         this.threadExecutor
-            = new ThreadPoolExecutor(maxConcurrentRequestCount,
-            maxConcurrentRequestCount,
-            10L,
-            TimeUnit.SECONDS,
-            new LinkedBlockingQueue<Runnable>());
+                = new ThreadPoolExecutor(maxConcurrentRequestCount,
+                maxConcurrentRequestCount,
+                120L,
+                TimeUnit.SECONDS,
+                new LinkedBlockingQueue<Runnable>());
         this.completionService = new ExecutorCompletionService<>(this.threadExecutor);
 
         this.entry = entry;
@@ -69,9 +71,6 @@ public class SeaweedOutputStream extends OutputStream {
     }
 
     private synchronized void flushWrittenBytesToServiceInternal(final long offset) throws IOException {
-
-        LOG.debug("SeaweedWrite.writeMeta path: {} entry:{}", path, entry);
-
         try {
             SeaweedWrite.writeMeta(filerGrpcClient, getParentDirectory(path), entry);
         } catch (Exception ex) {
@@ -87,7 +86,7 @@ public class SeaweedOutputStream extends OutputStream {
 
     @Override
     public synchronized void write(final byte[] data, final int off, final int length)
-        throws IOException {
+            throws IOException {
         maybeThrowLastError();
 
         Preconditions.checkArgument(data != null, "null data");
@@ -96,25 +95,29 @@ public class SeaweedOutputStream extends OutputStream {
             throw new IndexOutOfBoundsException();
         }
 
+        // System.out.println(path + " write [" + (outputIndex + off) + "," + ((outputIndex + off) + length) + ")");
+
         int currentOffset = off;
-        int writableBytes = bufferSize - bufferIndex;
+        int writableBytes = bufferSize - buffer.position();
         int numberOfBytesToWrite = length;
 
         while (numberOfBytesToWrite > 0) {
-            if (writableBytes <= numberOfBytesToWrite) {
-                System.arraycopy(data, currentOffset, buffer, bufferIndex, writableBytes);
-                bufferIndex += writableBytes;
-                writeCurrentBufferToService();
-                currentOffset += writableBytes;
-                numberOfBytesToWrite = numberOfBytesToWrite - writableBytes;
-            } else {
-                System.arraycopy(data, currentOffset, buffer, bufferIndex, numberOfBytesToWrite);
-                bufferIndex += numberOfBytesToWrite;
-                numberOfBytesToWrite = 0;
+
+            if (numberOfBytesToWrite < writableBytes) {
+                buffer.put(data, currentOffset, numberOfBytesToWrite);
+                outputIndex += numberOfBytesToWrite;
+                break;
             }
 
-            writableBytes = bufferSize - bufferIndex;
+            // System.out.println(path + "     [" + (outputIndex + currentOffset) + "," + ((outputIndex + currentOffset) + writableBytes) + ") " + buffer.capacity());
+            buffer.put(data, currentOffset, writableBytes);
+            outputIndex += writableBytes;
+            currentOffset += writableBytes;
+            writeCurrentBufferToService();
+            numberOfBytesToWrite = numberOfBytesToWrite - writableBytes;
+            writableBytes = bufferSize - buffer.position();
         }
+
     }
 
     /**
@@ -150,8 +153,9 @@ public class SeaweedOutputStream extends OutputStream {
             threadExecutor.shutdown();
         } finally {
             lastError = new IOException(FSExceptionMessages.STREAM_IS_CLOSED);
+            ByteBufferPool.release(buffer);
             buffer = null;
-            bufferIndex = 0;
+            outputIndex = 0;
             closed = true;
             writeOperations.clear();
             if (!threadExecutor.isShutdown()) {
@@ -161,35 +165,39 @@ public class SeaweedOutputStream extends OutputStream {
     }
 
     private synchronized void writeCurrentBufferToService() throws IOException {
-        if (bufferIndex == 0) {
+        if (buffer.position() == 0) {
             return;
         }
 
-        final byte[] bytes = buffer;
-        final int bytesLength = bufferIndex;
+        position += submitWriteBufferToService(buffer, position);
 
-        buffer = new byte[bufferSize];
-        bufferIndex = 0;
-        final long offset = position;
-        position += bytesLength;
+        buffer = ByteBufferPool.request(bufferSize);
 
-        if (threadExecutor.getQueue().size() >= maxConcurrentRequestCount * 2) {
+    }
+
+    private synchronized int submitWriteBufferToService(final ByteBuffer bufferToWrite, final long writePosition) throws IOException {
+
+        bufferToWrite.flip();
+        int bytesLength = bufferToWrite.limit() - bufferToWrite.position();
+
+        if (threadExecutor.getQueue().size() >= maxConcurrentRequestCount) {
             waitForTaskToComplete();
         }
-
-        final Future<Void> job = completionService.submit(new Callable<Void>() {
-            @Override
-            public Void call() throws Exception {
-                // originally: client.append(path, offset, bytes, 0, bytesLength);
-                SeaweedWrite.writeData(entry, replication, filerGrpcClient, offset, bytes, 0, bytesLength);
-                return null;
-            }
+        final Future<Void> job = completionService.submit(() -> {
+            // System.out.println(path + " is going to save [" + (writePosition) + "," + ((writePosition) + bytesLength) + ")");
+            SeaweedWrite.writeData(entry, replication, filerGrpcClient, writePosition, bufferToWrite.array(), bufferToWrite.position(), bufferToWrite.limit());
+            // System.out.println(path + " saved [" + (writePosition) + "," + ((writePosition) + bytesLength) + ")");
+            ByteBufferPool.release(bufferToWrite);
+            return null;
         });
 
-        writeOperations.add(new WriteOperation(job, offset, bytesLength));
+        writeOperations.add(new WriteOperation(job, writePosition, bytesLength));
 
         // Try to shrink the queue
         shrinkWriteOperationQueue();
+
+        return bytesLength;
+
     }
 
     private void waitForTaskToComplete() throws IOException {

other/java/hdfs3/dependency-reduced-pom.xml

@@ -15,8 +15,8 @@
       <plugin>
         <artifactId>maven-compiler-plugin</artifactId>
         <configuration>
-          <source>7</source>
-          <target>7</target>
+          <source>8</source>
+          <target>8</target>
         </configuration>
       </plugin>
       <plugin>
@@ -120,6 +120,188 @@
       </plugin>
     </plugins>
   </build>
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.hadoop</groupId>
+      <artifactId>hadoop-client</artifactId>
+      <version>3.1.1</version>
+      <scope>provided</scope>
+      <exclusions>
+        <exclusion>
+          <artifactId>hadoop-hdfs-client</artifactId>
+          <groupId>org.apache.hadoop</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>hadoop-yarn-api</artifactId>
+          <groupId>org.apache.hadoop</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>hadoop-yarn-client</artifactId>
+          <groupId>org.apache.hadoop</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>hadoop-mapreduce-client-core</artifactId>
+          <groupId>org.apache.hadoop</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>hadoop-mapreduce-client-jobclient</artifactId>
+          <groupId>org.apache.hadoop</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>hadoop-annotations</artifactId>
+          <groupId>org.apache.hadoop</groupId>
+        </exclusion>
+      </exclusions>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hadoop</groupId>
+      <artifactId>hadoop-common</artifactId>
+      <version>3.1.1</version>
+      <scope>provided</scope>
+      <exclusions>
+        <exclusion>
+          <artifactId>commons-cli</artifactId>
+          <groupId>commons-cli</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-math3</artifactId>
+          <groupId>org.apache.commons</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-io</artifactId>
+          <groupId>commons-io</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-net</artifactId>
+          <groupId>commons-net</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-collections</artifactId>
+          <groupId>commons-collections</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>javax.servlet-api</artifactId>
+          <groupId>javax.servlet</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jetty-server</artifactId>
+          <groupId>org.eclipse.jetty</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jetty-util</artifactId>
+          <groupId>org.eclipse.jetty</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jetty-servlet</artifactId>
+          <groupId>org.eclipse.jetty</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jetty-webapp</artifactId>
+          <groupId>org.eclipse.jetty</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jsp-api</artifactId>
+          <groupId>javax.servlet.jsp</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jersey-core</artifactId>
+          <groupId>com.sun.jersey</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jersey-servlet</artifactId>
+          <groupId>com.sun.jersey</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jersey-json</artifactId>
+          <groupId>com.sun.jersey</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jersey-server</artifactId>
+          <groupId>com.sun.jersey</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>log4j</artifactId>
+          <groupId>log4j</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-lang</artifactId>
+          <groupId>commons-lang</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-beanutils</artifactId>
+          <groupId>commons-beanutils</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-configuration2</artifactId>
+          <groupId>org.apache.commons</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-lang3</artifactId>
+          <groupId>org.apache.commons</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>slf4j-log4j12</artifactId>
+          <groupId>org.slf4j</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>avro</artifactId>
+          <groupId>org.apache.avro</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>re2j</artifactId>
+          <groupId>com.google.re2j</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>hadoop-auth</artifactId>
+          <groupId>org.apache.hadoop</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jsch</artifactId>
+          <groupId>com.jcraft</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>curator-client</artifactId>
+          <groupId>org.apache.curator</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>curator-recipes</artifactId>
+          <groupId>org.apache.curator</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>htrace-core4</artifactId>
+          <groupId>org.apache.htrace</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>zookeeper</artifactId>
+          <groupId>org.apache.zookeeper</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>commons-compress</artifactId>
+          <groupId>org.apache.commons</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>kerb-simplekdc</artifactId>
+          <groupId>org.apache.kerby</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>jackson-databind</artifactId>
+          <groupId>com.fasterxml.jackson.core</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>stax2-api</artifactId>
+          <groupId>org.codehaus.woodstox</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>woodstox-core</artifactId>
+          <groupId>com.fasterxml.woodstox</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>hadoop-annotations</artifactId>
+          <groupId>org.apache.hadoop</groupId>
+        </exclusion>
+      </exclusions>
+    </dependency>
+  </dependencies>
   <distributionManagement>
     <snapshotRepository>
       <id>ossrh</id>
@@ -127,7 +309,7 @@
     </snapshotRepository>
   </distributionManagement>
   <properties>
-    <seaweedfs.client.version>1.2.4</seaweedfs.client.version>
+    <seaweedfs.client.version>1.4.8</seaweedfs.client.version>
     <hadoop.version>3.1.1</hadoop.version>
   </properties>
 </project>

other/java/hdfs3/pom.xml

@@ -5,7 +5,7 @@
     <modelVersion>4.0.0</modelVersion>
 
     <properties>
-        <seaweedfs.client.version>1.2.4</seaweedfs.client.version>
+        <seaweedfs.client.version>1.4.8</seaweedfs.client.version>
         <hadoop.version>3.1.1</hadoop.version>
     </properties>
 
@@ -31,8 +31,8 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>7</source>
-                    <target>7</target>
+                    <source>8</source>
+                    <target>8</target>
                 </configuration>
             </plugin>
             <plugin>
@@ -147,6 +147,7 @@
             <groupId>org.apache.hadoop</groupId>
             <artifactId>hadoop-client</artifactId>
             <version>${hadoop.version}</version>
+            <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>com.github.chrislusf</groupId>
@@ -157,6 +158,7 @@
             <groupId>org.apache.hadoop</groupId>
             <artifactId>hadoop-common</artifactId>
             <version>${hadoop.version}</version>
+            <scope>provided</scope>
         </dependency>
     </dependencies>
 

other/java/hdfs3/src/main/java/seaweed/hdfs/ReadBuffer.java

@@ -1,137 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package seaweed.hdfs;
-
-import java.util.concurrent.CountDownLatch;
-
-class ReadBuffer {
-
-  private SeaweedInputStream stream;
-  private long offset;                   // offset within the file for the buffer
-  private int length;                    // actual length, set after the buffer is filles
-  private int requestedLength;           // requested length of the read
-  private byte[] buffer;                 // the buffer itself
-  private int bufferindex = -1;          // index in the buffers array in Buffer manager
-  private ReadBufferStatus status;             // status of the buffer
-  private CountDownLatch latch = null;   // signaled when the buffer is done reading, so any client
-  // waiting on this buffer gets unblocked
-
-  // fields to help with eviction logic
-  private long timeStamp = 0;  // tick at which buffer became available to read
-  private boolean isFirstByteConsumed = false;
-  private boolean isLastByteConsumed = false;
-  private boolean isAnyByteConsumed = false;
-
-  public SeaweedInputStream getStream() {
-    return stream;
-  }
-
-  public void setStream(SeaweedInputStream stream) {
-    this.stream = stream;
-  }
-
-  public long getOffset() {
-    return offset;
-  }
-
-  public void setOffset(long offset) {
-    this.offset = offset;
-  }
-
-  public int getLength() {
-    return length;
-  }
-
-  public void setLength(int length) {
-    this.length = length;
-  }
-
-  public int getRequestedLength() {
-    return requestedLength;
-  }
-
-  public void setRequestedLength(int requestedLength) {
-    this.requestedLength = requestedLength;
-  }
-
-  public byte[] getBuffer() {
-    return buffer;
-  }
-
-  public void setBuffer(byte[] buffer) {
-    this.buffer = buffer;
-  }
-
-  public int getBufferindex() {
-    return bufferindex;
-  }
-
-  public void setBufferindex(int bufferindex) {
-    this.bufferindex = bufferindex;
-  }
-
-  public ReadBufferStatus getStatus() {
-    return status;
-  }
-
-  public void setStatus(ReadBufferStatus status) {
-    this.status = status;
-  }
-
-  public CountDownLatch getLatch() {
-    return latch;
-  }
-
-  public void setLatch(CountDownLatch latch) {
-    this.latch = latch;
-  }
-
-  public long getTimeStamp() {
-    return timeStamp;
-  }
-
-  public void setTimeStamp(long timeStamp) {
-    this.timeStamp = timeStamp;
-  }
-
-  public boolean isFirstByteConsumed() {
-    return isFirstByteConsumed;
-  }
-
-  public void setFirstByteConsumed(boolean isFirstByteConsumed) {
-    this.isFirstByteConsumed = isFirstByteConsumed;
-  }
-
-  public boolean isLastByteConsumed() {
-    return isLastByteConsumed;
-  }
-
-  public void setLastByteConsumed(boolean isLastByteConsumed) {
-    this.isLastByteConsumed = isLastByteConsumed;
-  }
-
-  public boolean isAnyByteConsumed() {
-    return isAnyByteConsumed;
-  }
-
-  public void setAnyByteConsumed(boolean isAnyByteConsumed) {
-    this.isAnyByteConsumed = isAnyByteConsumed;
-  }
-
-}

other/java/hdfs3/src/main/java/seaweed/hdfs/ReadBufferManager.java

@@ -1,394 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- * <p>
- * http://www.apache.org/licenses/LICENSE-2.0
- * <p>
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package seaweed.hdfs;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import java.util.Collection;
-import java.util.LinkedList;
-import java.util.Queue;
-import java.util.Stack;
-import java.util.concurrent.CountDownLatch;
-
-/**
- * The Read Buffer Manager for Rest AbfsClient.
- */
-final class ReadBufferManager {
-  private static final Logger LOGGER = LoggerFactory.getLogger(ReadBufferManager.class);
-
-  private static final int NUM_BUFFERS = 16;
-  private static final int BLOCK_SIZE = 4 * 1024 * 1024;
-  private static final int NUM_THREADS = 8;
-  private static final int THRESHOLD_AGE_MILLISECONDS = 3000; // have to see if 3 seconds is a good threshold
-
-  private Thread[] threads = new Thread[NUM_THREADS];
-  private byte[][] buffers;    // array of byte[] buffers, to hold the data that is read
-  private Stack<Integer> freeList = new Stack<>();   // indices in buffers[] array that are available
-
-  private Queue<ReadBuffer> readAheadQueue = new LinkedList<>(); // queue of requests that are not picked up by any worker thread yet
-  private LinkedList<ReadBuffer> inProgressList = new LinkedList<>(); // requests being processed by worker threads
-  private LinkedList<ReadBuffer> completedReadList = new LinkedList<>(); // buffers available for reading
-  private static final ReadBufferManager BUFFER_MANAGER; // singleton, initialized in static initialization block
-
-  static {
-    BUFFER_MANAGER = new ReadBufferManager();
-    BUFFER_MANAGER.init();
-  }
-
-  static ReadBufferManager getBufferManager() {
-    return BUFFER_MANAGER;
-  }
-
-  private void init() {
-    buffers = new byte[NUM_BUFFERS][];
-    for (int i = 0; i < NUM_BUFFERS; i++) {
-      buffers[i] = new byte[BLOCK_SIZE];  // same buffers are reused. The byte array never goes back to GC
-      freeList.add(i);
-    }
-    for (int i = 0; i < NUM_THREADS; i++) {
-      Thread t = new Thread(new ReadBufferWorker(i));
-      t.setDaemon(true);
-      threads[i] = t;
-      t.setName("SeaweedFS-prefetch-" + i);
-      t.start();
-    }
-    ReadBufferWorker.UNLEASH_WORKERS.countDown();
-  }
-
-  // hide instance constructor
-  private ReadBufferManager() {
-  }
-
-
-  /*
-   *
-   *  SeaweedInputStream-facing methods
-   *
-   */
-
-
-  /**
-   * {@link SeaweedInputStream} calls this method to queue read-aheads.
-   *
-   * @param stream          The {@link SeaweedInputStream} for which to do the read-ahead
-   * @param requestedOffset The offset in the file which shoukd be read
-   * @param requestedLength The length to read
-   */
-  void queueReadAhead(final SeaweedInputStream stream, final long requestedOffset, final int requestedLength) {
-    if (LOGGER.isTraceEnabled()) {
-      LOGGER.trace("Start Queueing readAhead for {} offset {} length {}",
-          stream.getPath(), requestedOffset, requestedLength);
-    }
-    ReadBuffer buffer;
-    synchronized (this) {
-      if (isAlreadyQueued(stream, requestedOffset)) {
-        return; // already queued, do not queue again
-      }
-      if (freeList.isEmpty() && !tryEvict()) {
-        return; // no buffers available, cannot queue anything
-      }
-
-      buffer = new ReadBuffer();
-      buffer.setStream(stream);
-      buffer.setOffset(requestedOffset);
-      buffer.setLength(0);
-      buffer.setRequestedLength(requestedLength);
-      buffer.setStatus(ReadBufferStatus.NOT_AVAILABLE);
-      buffer.setLatch(new CountDownLatch(1));
-
-      Integer bufferIndex = freeList.pop();  // will return a value, since we have checked size > 0 already
-
-      buffer.setBuffer(buffers[bufferIndex]);
-      buffer.setBufferindex(bufferIndex);
-      readAheadQueue.add(buffer);
-      notifyAll();
-    }
-    if (LOGGER.isTraceEnabled()) {
-      LOGGER.trace("Done q-ing readAhead for file {} offset {} buffer idx {}",
-          stream.getPath(), requestedOffset, buffer.getBufferindex());
-    }
-  }
-
-
-  /**
-   * {@link SeaweedInputStream} calls this method read any bytes already available in a buffer (thereby saving a
-   * remote read). This returns the bytes if the data already exists in buffer. If there is a buffer that is reading
-   * the requested offset, then this method blocks until that read completes. If the data is queued in a read-ahead
-   * but not picked up by a worker thread yet, then it cancels that read-ahead and reports cache miss. This is because
-   * depending on worker thread availability, the read-ahead may take a while - the calling thread can do it's own
-   * read to get the data faster (copmared to the read waiting in queue for an indeterminate amount of time).
-   *
-   * @param stream   the file to read bytes for
-   * @param position the offset in the file to do a read for
-   * @param length   the length to read
-   * @param buffer   the buffer to read data into. Note that the buffer will be written into from offset 0.
-   * @return the number of bytes read
-   */
-  int getBlock(final SeaweedInputStream stream, final long position, final int length, final byte[] buffer) {
-    // not synchronized, so have to be careful with locking
-    if (LOGGER.isTraceEnabled()) {
-      LOGGER.trace("getBlock for file {}  position {}  thread {}",
-          stream.getPath(), position, Thread.currentThread().getName());
-    }
-
-    waitForProcess(stream, position);
-
-    int bytesRead = 0;
-    synchronized (this) {
-      bytesRead = getBlockFromCompletedQueue(stream, position, length, buffer);
-    }
-    if (bytesRead > 0) {
-      if (LOGGER.isTraceEnabled()) {
-        LOGGER.trace("Done read from Cache for {} position {} length {}",
-            stream.getPath(), position, bytesRead);
-      }
-      return bytesRead;
-    }
-
-    // otherwise, just say we got nothing - calling thread can do its own read
-    return 0;
-  }
-
-  /*
-   *
-   *  Internal methods
-   *
-   */
-
-  private void waitForProcess(final SeaweedInputStream stream, final long position) {
-    ReadBuffer readBuf;
-    synchronized (this) {
-      clearFromReadAheadQueue(stream, position);
-      readBuf = getFromList(inProgressList, stream, position);
-    }
-    if (readBuf != null) {         // if in in-progress queue, then block for it
-      try {
-        if (LOGGER.isTraceEnabled()) {
-          LOGGER.trace("got a relevant read buffer for file {} offset {} buffer idx {}",
-              stream.getPath(), readBuf.getOffset(), readBuf.getBufferindex());
-        }
-        readBuf.getLatch().await();  // blocking wait on the caller stream's thread
-        // Note on correctness: readBuf gets out of inProgressList only in 1 place: after worker thread
-        // is done processing it (in doneReading). There, the latch is set after removing the buffer from
-        // inProgressList. So this latch is safe to be outside the synchronized block.
-        // Putting it in synchronized would result in a deadlock, since this thread would be holding the lock
-        // while waiting, so no one will be able to  change any state. If this becomes more complex in the future,
-        // then the latch cane be removed and replaced with wait/notify whenever inProgressList is touched.
-      } catch (InterruptedException ex) {
-        Thread.currentThread().interrupt();
-      }
-      if (LOGGER.isTraceEnabled()) {
-        LOGGER.trace("latch done for file {} buffer idx {} length {}",
-            stream.getPath(), readBuf.getBufferindex(), readBuf.getLength());
-      }
-    }
-  }
-
-  /**
-   * If any buffer in the completedlist can be reclaimed then reclaim it and return the buffer to free list.
-   * The objective is to find just one buffer - there is no advantage to evicting more than one.
-   *
-   * @return whether the eviction succeeeded - i.e., were we able to free up one buffer
-   */
-  private synchronized boolean tryEvict() {
-    ReadBuffer nodeToEvict = null;
-    if (completedReadList.size() <= 0) {
-      return false;  // there are no evict-able buffers
-    }
-
-    // first, try buffers where all bytes have been consumed (approximated as first and last bytes consumed)
-    for (ReadBuffer buf : completedReadList) {
-      if (buf.isFirstByteConsumed() && buf.isLastByteConsumed()) {
-        nodeToEvict = buf;
-        break;
-      }
-    }
-    if (nodeToEvict != null) {
-      return evict(nodeToEvict);
-    }
-
-    // next, try buffers where any bytes have been consumed (may be a bad idea? have to experiment and see)
-    for (ReadBuffer buf : completedReadList) {
-      if (buf.isAnyByteConsumed()) {
-        nodeToEvict = buf;
-        break;
-      }
-    }
-
-    if (nodeToEvict != null) {
-      return evict(nodeToEvict);
-    }
-
-    // next, try any old nodes that have not been consumed
-    long earliestBirthday = Long.MAX_VALUE;
-    for (ReadBuffer buf : completedReadList) {
-      if (buf.getTimeStamp() < earliestBirthday) {
-        nodeToEvict = buf;
-        earliestBirthday = buf.getTimeStamp();
-      }
-    }
-    if ((currentTimeMillis() - earliestBirthday > THRESHOLD_AGE_MILLISECONDS) && (nodeToEvict != null)) {
-      return evict(nodeToEvict);
-    }
-
-    // nothing can be evicted
-    return false;
-  }
-
-  private boolean evict(final ReadBuffer buf) {
-    freeList.push(buf.getBufferindex());
-    completedReadList.remove(buf);
-    if (LOGGER.isTraceEnabled()) {
-      LOGGER.trace("Evicting buffer idx {}; was used for file {} offset {} length {}",
-          buf.getBufferindex(), buf.getStream().getPath(), buf.getOffset(), buf.getLength());
-    }
-    return true;
-  }
-
-  private boolean isAlreadyQueued(final SeaweedInputStream stream, final long requestedOffset) {
-    // returns true if any part of the buffer is already queued
-    return (isInList(readAheadQueue, stream, requestedOffset)
-        || isInList(inProgressList, stream, requestedOffset)
-        || isInList(completedReadList, stream, requestedOffset));
-  }
-
-  private boolean isInList(final Collection<ReadBuffer> list, final SeaweedInputStream stream, final long requestedOffset) {
-    return (getFromList(list, stream, requestedOffset) != null);
-  }
-
-  private ReadBuffer getFromList(final Collection<ReadBuffer> list, final SeaweedInputStream stream, final long requestedOffset) {
-    for (ReadBuffer buffer : list) {
-      if (buffer.getStream() == stream) {
-        if (buffer.getStatus() == ReadBufferStatus.AVAILABLE
-            && requestedOffset >= buffer.getOffset()
-            && requestedOffset < buffer.getOffset() + buffer.getLength()) {
-          return buffer;
-        } else if (requestedOffset >= buffer.getOffset()
-            && requestedOffset < buffer.getOffset() + buffer.getRequestedLength()) {
-          return buffer;
-        }
-      }
-    }
-    return null;
-  }
-
-  private void clearFromReadAheadQueue(final SeaweedInputStream stream, final long requestedOffset) {
-    ReadBuffer buffer = getFromList(readAheadQueue, stream, requestedOffset);
-    if (buffer != null) {
-      readAheadQueue.remove(buffer);
-      notifyAll();   // lock is held in calling method
-      freeList.push(buffer.getBufferindex());
-    }
-  }
-
-  private int getBlockFromCompletedQueue(final SeaweedInputStream stream, final long position, final int length,
-                                         final byte[] buffer) {
-    ReadBuffer buf = getFromList(completedReadList, stream, position);
-    if (buf == null || position >= buf.getOffset() + buf.getLength()) {
-      return 0;
-    }
-    int cursor = (int) (position - buf.getOffset());
-    int availableLengthInBuffer = buf.getLength() - cursor;
-    int lengthToCopy = Math.min(length, availableLengthInBuffer);
-    System.arraycopy(buf.getBuffer(), cursor, buffer, 0, lengthToCopy);
-    if (cursor == 0) {
-      buf.setFirstByteConsumed(true);
-    }
-    if (cursor + lengthToCopy == buf.getLength()) {
-      buf.setLastByteConsumed(true);
-    }
-    buf.setAnyByteConsumed(true);
-    return lengthToCopy;
-  }
-
-  /*
-   *
-   *  ReadBufferWorker-thread-facing methods
-   *
-   */
-
-  /**
-   * ReadBufferWorker thread calls this to get the next buffer that it should work on.
-   *
-   * @return {@link ReadBuffer}
-   * @throws InterruptedException if thread is interrupted
-   */
-  ReadBuffer getNextBlockToRead() throws InterruptedException {
-    ReadBuffer buffer = null;
-    synchronized (this) {
-      //buffer = readAheadQueue.take();  // blocking method
-      while (readAheadQueue.size() == 0) {
-        wait();
-      }
-      buffer = readAheadQueue.remove();
-      notifyAll();
-      if (buffer == null) {
-        return null;            // should never happen
-      }
-      buffer.setStatus(ReadBufferStatus.READING_IN_PROGRESS);
-      inProgressList.add(buffer);
-    }
-    if (LOGGER.isTraceEnabled()) {
-      LOGGER.trace("ReadBufferWorker picked file {} for offset {}",
-          buffer.getStream().getPath(), buffer.getOffset());
-    }
-    return buffer;
-  }
-
-  /**
-   * ReadBufferWorker thread calls this method to post completion.
-   *
-   * @param buffer            the buffer whose read was completed
-   * @param result            the {@link ReadBufferStatus} after the read operation in the worker thread
-   * @param bytesActuallyRead the number of bytes that the worker thread was actually able to read
-   */
-  void doneReading(final ReadBuffer buffer, final ReadBufferStatus result, final int bytesActuallyRead) {
-    if (LOGGER.isTraceEnabled()) {
-      LOGGER.trace("ReadBufferWorker completed file {} for offset {} bytes {}",
-          buffer.getStream().getPath(),  buffer.getOffset(), bytesActuallyRead);
-    }
-    synchronized (this) {
-      inProgressList.remove(buffer);
-      if (result == ReadBufferStatus.AVAILABLE && bytesActuallyRead > 0) {
-        buffer.setStatus(ReadBufferStatus.AVAILABLE);
-        buffer.setTimeStamp(currentTimeMillis());
-        buffer.setLength(bytesActuallyRead);
-        completedReadList.add(buffer);
-      } else {
-        freeList.push(buffer.getBufferindex());
-        // buffer should go out of scope after the end of the calling method in ReadBufferWorker, and eligible for GC
-      }
-    }
-    //outside the synchronized, since anyone receiving a wake-up from the latch must see safe-published results
-    buffer.getLatch().countDown(); // wake up waiting threads (if any)
-  }
-
-  /**
-   * Similar to System.currentTimeMillis, except implemented with System.nanoTime().
-   * System.currentTimeMillis can go backwards when system clock is changed (e.g., with NTP time synchronization),
-   * making it unsuitable for measuring time intervals. nanotime is strictly monotonically increasing per CPU core.
-   * Note: it is not monotonic across Sockets, and even within a CPU, its only the
-   * more recent parts which share a clock across all cores.
-   *
-   * @return current time in milliseconds
-   */
-  private long currentTimeMillis() {
-    return System.nanoTime() / 1000 / 1000;
-  }
-}

other/java/hdfs3/src/main/java/seaweed/hdfs/ReadBufferWorker.java

@@ -1,70 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package seaweed.hdfs;
-
-import java.util.concurrent.CountDownLatch;
-
-class ReadBufferWorker implements Runnable {
-
-  protected static final CountDownLatch UNLEASH_WORKERS = new CountDownLatch(1);
-  private int id;
-
-  ReadBufferWorker(final int id) {
-    this.id = id;
-  }
-
-  /**
-   * return the ID of ReadBufferWorker.
-   */
-  public int getId() {
-    return this.id;
-  }
-
-  /**
-   * Waits until a buffer becomes available in ReadAheadQueue.
-   * Once a buffer becomes available, reads the file specified in it and then posts results back to buffer manager.
-   * Rinse and repeat. Forever.
-   */
-  public void run() {
-    try {
-      UNLEASH_WORKERS.await();
-    } catch (InterruptedException ex) {
-      Thread.currentThread().interrupt();
-    }
-    ReadBufferManager bufferManager = ReadBufferManager.getBufferManager();
-    ReadBuffer buffer;
-    while (true) {
-      try {
-        buffer = bufferManager.getNextBlockToRead();   // blocks, until a buffer is available for this thread
-      } catch (InterruptedException ex) {
-        Thread.currentThread().interrupt();
-        return;
-      }
-      if (buffer != null) {
-        try {
-          // do the actual read, from the file.
-          int bytesRead = buffer.getStream().readRemote(buffer.getOffset(), buffer.getBuffer(), 0, buffer.getRequestedLength());
-          bufferManager.doneReading(buffer, ReadBufferStatus.AVAILABLE, bytesRead);  // post result back to ReadBufferManager
-        } catch (Exception ex) {
-          bufferManager.doneReading(buffer, ReadBufferStatus.READ_FAILED, 0);
-        }
-      }
-    }
-  }
-}

other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedAbstractFileSystem.java

@@ -18,12 +18,18 @@
 
 package seaweed.hdfs;
 
-/**
- * The ReadBufferStatus for Rest AbfsClient
- */
-public enum ReadBufferStatus {
-  NOT_AVAILABLE,  // buffers sitting in readaheadqueue have this stats
-  READING_IN_PROGRESS,  // reading is in progress on this buffer. Buffer should be in inProgressList
-  AVAILABLE,  // data is available in buffer. It should be in completedList
-  READ_FAILED  // read completed, but failed.
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.DelegateToFileSystem;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.URISyntaxException;
+
+public class SeaweedAbstractFileSystem extends DelegateToFileSystem {
+
+    SeaweedAbstractFileSystem(final URI uri, final Configuration conf)
+            throws IOException, URISyntaxException {
+        super(uri, new SeaweedFileSystem(), conf, "seaweedfs", false);
+    }
+
 }

other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedFileSystem.java

@@ -5,31 +5,29 @@ import org.apache.hadoop.fs.*;
 import org.apache.hadoop.fs.permission.AclEntry;
 import org.apache.hadoop.fs.permission.AclStatus;
 import org.apache.hadoop.fs.permission.FsPermission;
-import org.apache.hadoop.security.AccessControlException;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.util.Progressable;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import seaweedfs.client.FilerProto;
 
 import java.io.FileNotFoundException;
 import java.io.IOException;
-import java.io.InputStream;
 import java.io.OutputStream;
 import java.net.URI;
 import java.util.EnumSet;
 import java.util.List;
 import java.util.Map;
 
-import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.IO_FILE_BUFFER_SIZE_KEY;
-
 public class SeaweedFileSystem extends FileSystem {
 
-    public static final int FS_SEAWEED_DEFAULT_PORT = 8888;
     public static final String FS_SEAWEED_FILER_HOST = "fs.seaweed.filer.host";
     public static final String FS_SEAWEED_FILER_PORT = "fs.seaweed.filer.port";
+    public static final int FS_SEAWEED_DEFAULT_PORT = 8888;
+    public static final String FS_SEAWEED_BUFFER_SIZE = "fs.seaweed.buffer.size";
+    public static final int FS_SEAWEED_DEFAULT_BUFFER_SIZE = 4 * 1024 * 1024;
 
     private static final Logger LOG = LoggerFactory.getLogger(SeaweedFileSystem.class);
-    private static int BUFFER_SIZE = 16 * 1024 * 1024;
 
     private URI uri;
     private Path workingDirectory = new Path("/");
@@ -60,8 +58,6 @@ public class SeaweedFileSystem extends FileSystem {
         port = (port == -1) ? FS_SEAWEED_DEFAULT_PORT : port;
         conf.setInt(FS_SEAWEED_FILER_PORT, port);
 
-        conf.setInt(IO_FILE_BUFFER_SIZE_KEY, BUFFER_SIZE);
-
         setConf(conf);
         this.uri = uri;
 
@@ -77,8 +73,9 @@ public class SeaweedFileSystem extends FileSystem {
         path = qualify(path);
 
         try {
-            InputStream inputStream = seaweedFileSystemStore.openFileForRead(path, statistics, bufferSize);
-            return new FSDataInputStream(inputStream);
+            int seaweedBufferSize = this.getConf().getInt(FS_SEAWEED_BUFFER_SIZE, FS_SEAWEED_DEFAULT_BUFFER_SIZE);
+            FSInputStream inputStream = seaweedFileSystemStore.openFileForRead(path, statistics, seaweedBufferSize);
+            return new FSDataInputStream(new BufferedFSInputStream(inputStream, 4 * seaweedBufferSize));
         } catch (Exception ex) {
             LOG.warn("open path: {} bufferSize:{}", path, bufferSize, ex);
             return null;
@@ -95,7 +92,8 @@ public class SeaweedFileSystem extends FileSystem {
 
         try {
             String replicaPlacement = String.format("%03d", replication - 1);
-            OutputStream outputStream = seaweedFileSystemStore.createFile(path, overwrite, permission, bufferSize, replicaPlacement);
+            int seaweedBufferSize = this.getConf().getInt(FS_SEAWEED_BUFFER_SIZE, FS_SEAWEED_DEFAULT_BUFFER_SIZE);
+            OutputStream outputStream = seaweedFileSystemStore.createFile(path, overwrite, permission, seaweedBufferSize, replicaPlacement);
             return new FSDataOutputStream(outputStream, statistics);
         } catch (Exception ex) {
             LOG.warn("create path: {} bufferSize:{} blockSize:{}", path, bufferSize, blockSize, ex);
@@ -105,8 +103,9 @@ public class SeaweedFileSystem extends FileSystem {
 
     /**
      * {@inheritDoc}
+     *
      * @throws FileNotFoundException if the parent directory is not present -or
-     * is not a directory.
+     *                               is not a directory.
      */
     @Override
     public FSDataOutputStream createNonRecursive(Path path,
@@ -123,9 +122,10 @@ public class SeaweedFileSystem extends FileSystem {
                 throw new FileAlreadyExistsException("Not a directory: " + parent);
             }
         }
+        int seaweedBufferSize = this.getConf().getInt(FS_SEAWEED_BUFFER_SIZE, FS_SEAWEED_DEFAULT_BUFFER_SIZE);
         return create(path, permission,
                 flags.contains(CreateFlag.OVERWRITE), bufferSize,
-                replication, blockSize, progress);
+                replication, seaweedBufferSize, progress);
     }
 
     @Override
@@ -135,7 +135,8 @@ public class SeaweedFileSystem extends FileSystem {
 
         path = qualify(path);
         try {
-            OutputStream outputStream = seaweedFileSystemStore.createFile(path, false, null, bufferSize, "");
+            int seaweedBufferSize = this.getConf().getInt(FS_SEAWEED_BUFFER_SIZE, FS_SEAWEED_DEFAULT_BUFFER_SIZE);
+            OutputStream outputStream = seaweedFileSystemStore.createFile(path, false, null, seaweedBufferSize, "");
             return new FSDataOutputStream(outputStream, statistics);
         } catch (Exception ex) {
             LOG.warn("append path: {} bufferSize:{}", path, bufferSize, ex);
@@ -144,7 +145,7 @@ public class SeaweedFileSystem extends FileSystem {
     }
 
     @Override
-    public boolean rename(Path src, Path dst) {
+    public boolean rename(Path src, Path dst) throws IOException {
 
         LOG.debug("rename path: {} => {}", src, dst);
 
@@ -155,12 +156,13 @@ public class SeaweedFileSystem extends FileSystem {
         if (src.equals(dst)) {
             return true;
         }
-        FileStatus dstFileStatus = getFileStatus(dst);
+        FilerProto.Entry entry = seaweedFileSystemStore.lookupEntry(dst);
 
-        String sourceFileName = src.getName();
         Path adjustedDst = dst;
 
-        if (dstFileStatus != null) {
+        if (entry != null) {
+            FileStatus dstFileStatus = getFileStatus(dst);
+            String sourceFileName = src.getName();
             if (!dstFileStatus.isDirectory()) {
                 return false;
             }
@@ -175,18 +177,20 @@ public class SeaweedFileSystem extends FileSystem {
     }
 
     @Override
-    public boolean delete(Path path, boolean recursive) {
+    public boolean delete(Path path, boolean recursive) throws IOException {
 
         LOG.debug("delete path: {} recursive:{}", path, recursive);
 
         path = qualify(path);
 
-        FileStatus fileStatus = getFileStatus(path);
+        FilerProto.Entry entry = seaweedFileSystemStore.lookupEntry(path);
 
-        if (fileStatus == null) {
+        if (entry == null) {
             return true;
         }
 
+        FileStatus fileStatus = getFileStatus(path);
+
         return seaweedFileSystemStore.deleteEntries(path, fileStatus.isDirectory(), recursive);
 
     }
@@ -222,9 +226,9 @@ public class SeaweedFileSystem extends FileSystem {
 
         path = qualify(path);
 
-        FileStatus fileStatus = getFileStatus(path);
+        FilerProto.Entry entry = seaweedFileSystemStore.lookupEntry(path);
 
-        if (fileStatus == null) {
+        if (entry == null) {
 
             UserGroupInformation currentUser = UserGroupInformation.getCurrentUser();
             return seaweedFileSystemStore.createDirectory(path, currentUser,
@@ -233,6 +237,8 @@ public class SeaweedFileSystem extends FileSystem {
 
         }
 
+        FileStatus fileStatus = getFileStatus(path);
+
         if (fileStatus.isDirectory()) {
             return true;
         } else {
@@ -241,7 +247,7 @@ public class SeaweedFileSystem extends FileSystem {
     }
 
     @Override
-    public FileStatus getFileStatus(Path path) {
+    public FileStatus getFileStatus(Path path) throws IOException {
 
         LOG.debug("getFileStatus path: {}", path);
 
@@ -335,9 +341,7 @@ public class SeaweedFileSystem extends FileSystem {
 
     @Override
     public void createSymlink(final Path target, final Path link,
-                              final boolean createParent) throws AccessControlException,
-            FileAlreadyExistsException, FileNotFoundException,
-            ParentNotDirectoryException, UnsupportedFileSystemException,
+                              final boolean createParent) throws
             IOException {
         // Supporting filesystems should override this method
         throw new UnsupportedOperationException(

other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedFileSystemStore.java

@@ -1,5 +1,6 @@
 package seaweed.hdfs;
 
+import org.apache.hadoop.fs.FSInputStream;
 import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
@@ -7,14 +8,10 @@ import org.apache.hadoop.fs.permission.FsPermission;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import seaweedfs.client.FilerClient;
-import seaweedfs.client.FilerGrpcClient;
-import seaweedfs.client.FilerProto;
-import seaweedfs.client.SeaweedRead;
+import seaweedfs.client.*;
 
 import java.io.FileNotFoundException;
 import java.io.IOException;
-import java.io.InputStream;
 import java.io.OutputStream;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -61,9 +58,19 @@ public class SeaweedFileSystemStore {
         );
     }
 
-    public FileStatus[] listEntries(final Path path) {
+    public FileStatus[] listEntries(final Path path) throws IOException {
         LOG.debug("listEntries path: {}", path);
 
+        FileStatus pathStatus = getFileStatus(path);
+
+        if (pathStatus == null) {
+            return new FileStatus[0];
+        }
+
+        if (!pathStatus.isDirectory()) {
+            return new FileStatus[]{pathStatus};
+        }
+
         List<FileStatus> fileStatuses = new ArrayList<FileStatus>();
 
         List<FilerProto.Entry> entries = filerClient.listEntries(path.toUri().getPath());
@@ -74,14 +81,16 @@ public class SeaweedFileSystemStore {
 
             fileStatuses.add(fileStatus);
         }
+        LOG.debug("listEntries path: {} size {}", fileStatuses, fileStatuses.size());
         return fileStatuses.toArray(new FileStatus[0]);
+
     }
 
-    public FileStatus getFileStatus(final Path path) {
+    public FileStatus getFileStatus(final Path path) throws IOException {
 
         FilerProto.Entry entry = lookupEntry(path);
         if (entry == null) {
-            return null;
+            throw new FileNotFoundException("File does not exist: " + path);
         }
         LOG.debug("doGetFileStatus path:{} entry:{}", path, entry);
 
@@ -111,7 +120,7 @@ public class SeaweedFileSystemStore {
 
     private FileStatus doGetFileStatus(Path path, FilerProto.Entry entry) {
         FilerProto.FuseAttributes attributes = entry.getAttributes();
-        long length = SeaweedRead.totalSize(entry.getChunksList());
+        long length = SeaweedRead.fileSize(entry);
         boolean isDir = entry.getIsDirectory();
         int block_replication = 1;
         int blocksize = 512;
@@ -124,7 +133,7 @@ public class SeaweedFileSystemStore {
             modification_time, access_time, permission, owner, group, null, path);
     }
 
-    private FilerProto.Entry lookupEntry(Path path) {
+    public FilerProto.Entry lookupEntry(Path path) {
 
         return filerClient.lookupEntry(getParentDirectory(path), path.getName());
 
@@ -172,7 +181,7 @@ public class SeaweedFileSystemStore {
                 entry.mergeFrom(existingEntry);
                 entry.getAttributesBuilder().setMtime(now);
                 LOG.debug("createFile merged entry path:{} entry:{} from:{}", path, entry, existingEntry);
-                writePosition = SeaweedRead.totalSize(existingEntry.getChunksList());
+                writePosition = SeaweedRead.fileSize(existingEntry);
                 replication = existingEntry.getAttributes().getReplication();
             }
         }
@@ -189,18 +198,18 @@ public class SeaweedFileSystemStore {
                     .clearGroupName()
                     .addAllGroupName(Arrays.asList(userGroupInformation.getGroupNames()))
                 );
+            SeaweedWrite.writeMeta(filerGrpcClient, getParentDirectory(path), entry);
         }
 
         return new SeaweedOutputStream(filerGrpcClient, path, entry, writePosition, bufferSize, replication);
 
     }
 
-    public InputStream openFileForRead(final Path path, FileSystem.Statistics statistics,
-                                       int bufferSize) throws IOException {
+    public FSInputStream openFileForRead(final Path path, FileSystem.Statistics statistics,
+                                         int bufferSize) throws IOException {
 
         LOG.debug("openFileForRead path:{} bufferSize:{}", path, bufferSize);
 
-        int readAheadQueueDepth = 2;
         FilerProto.Entry entry = lookupEntry(path);
 
         if (entry == null) {
@@ -211,8 +220,7 @@ public class SeaweedFileSystemStore {
             statistics,
             path.toUri().getPath(),
             entry,
-            bufferSize,
-            readAheadQueueDepth);
+            bufferSize);
     }
 
     public void setOwner(Path path, String owner, String group) {

other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedInputStream.java

@@ -2,7 +2,6 @@ package seaweed.hdfs;
 
 // based on org.apache.hadoop.fs.azurebfs.services.AbfsInputStream
 
-import com.google.common.base.Preconditions;
 import org.apache.hadoop.fs.FSExceptionMessages;
 import org.apache.hadoop.fs.FSInputStream;
 import org.apache.hadoop.fs.FileSystem.Statistics;
@@ -27,35 +26,25 @@ public class SeaweedInputStream extends FSInputStream {
     private final List<SeaweedRead.VisibleInterval> visibleIntervalList;
     private final long contentLength;
     private final int bufferSize; // default buffer size
-    private final int readAheadQueueDepth;         // initialized in constructor
-    private final boolean readAheadEnabled; // whether enable readAhead;
 
-    private byte[] buffer = null;            // will be initialized on first use
+    private long position = 0;  // cursor of the file
 
-    private long fCursor = 0;  // cursor of buffer within file - offset of next byte to read from remote server
-    private long fCursorAfterLastRead = -1;
-    private int bCursor = 0;   // cursor of read within buffer - offset of next byte to be returned from buffer
-    private int limit = 0;     // offset of next byte to be read into buffer from service (i.e., upper marker+1
-    //                                                      of valid bytes in buffer)
     private boolean closed = false;
 
     public SeaweedInputStream(
-        final FilerGrpcClient filerGrpcClient,
-        final Statistics statistics,
-        final String path,
-        final FilerProto.Entry entry,
-        final int bufferSize,
-        final int readAheadQueueDepth) {
+            final FilerGrpcClient filerGrpcClient,
+            final Statistics statistics,
+            final String path,
+            final FilerProto.Entry entry,
+            final int bufferSize) throws IOException {
         this.filerGrpcClient = filerGrpcClient;
         this.statistics = statistics;
         this.path = path;
         this.entry = entry;
-        this.contentLength = SeaweedRead.totalSize(entry.getChunksList());
+        this.contentLength = SeaweedRead.fileSize(entry);
         this.bufferSize = bufferSize;
-        this.readAheadQueueDepth = (readAheadQueueDepth >= 0) ? readAheadQueueDepth : Runtime.getRuntime().availableProcessors();
-        this.readAheadEnabled = true;
 
-        this.visibleIntervalList = SeaweedRead.nonOverlappingVisibleIntervals(entry.getChunksList());
+        this.visibleIntervalList = SeaweedRead.nonOverlappingVisibleIntervals(filerGrpcClient, entry.getChunksList());
 
         LOG.debug("new path:{} entry:{} visibleIntervalList:{}", path, entry, visibleIntervalList);
 
@@ -78,122 +67,7 @@ public class SeaweedInputStream extends FSInputStream {
 
     @Override
     public synchronized int read(final byte[] b, final int off, final int len) throws IOException {
-        int currentOff = off;
-        int currentLen = len;
-        int lastReadBytes;
-        int totalReadBytes = 0;
-        do {
-            lastReadBytes = readOneBlock(b, currentOff, currentLen);
-            if (lastReadBytes > 0) {
-                currentOff += lastReadBytes;
-                currentLen -= lastReadBytes;
-                totalReadBytes += lastReadBytes;
-            }
-            if (currentLen <= 0 || currentLen > b.length - currentOff) {
-                break;
-            }
-        } while (lastReadBytes > 0);
-        return totalReadBytes > 0 ? totalReadBytes : lastReadBytes;
-    }
 
-    private int readOneBlock(final byte[] b, final int off, final int len) throws IOException {
-        if (closed) {
-            throw new IOException(FSExceptionMessages.STREAM_IS_CLOSED);
-        }
-
-        Preconditions.checkNotNull(b);
-
-        if (len == 0) {
-            return 0;
-        }
-
-        if (this.available() == 0) {
-            return -1;
-        }
-
-        if (off < 0 || len < 0 || len > b.length - off) {
-            throw new IndexOutOfBoundsException();
-        }
-
-        //If buffer is empty, then fill the buffer.
-        if (bCursor == limit) {
-            //If EOF, then return -1
-            if (fCursor >= contentLength) {
-                return -1;
-            }
-
-            long bytesRead = 0;
-            //reset buffer to initial state - i.e., throw away existing data
-            bCursor = 0;
-            limit = 0;
-            if (buffer == null) {
-                buffer = new byte[bufferSize];
-            }
-
-            // Enable readAhead when reading sequentially
-            if (-1 == fCursorAfterLastRead || fCursorAfterLastRead == fCursor || b.length >= bufferSize) {
-                bytesRead = readInternal(fCursor, buffer, 0, bufferSize, false);
-            } else {
-                bytesRead = readInternal(fCursor, buffer, 0, b.length, true);
-            }
-
-            if (bytesRead == -1) {
-                return -1;
-            }
-
-            limit += bytesRead;
-            fCursor += bytesRead;
-            fCursorAfterLastRead = fCursor;
-        }
-
-        //If there is anything in the buffer, then return lesser of (requested bytes) and (bytes in buffer)
-        //(bytes returned may be less than requested)
-        int bytesRemaining = limit - bCursor;
-        int bytesToRead = Math.min(len, bytesRemaining);
-        System.arraycopy(buffer, bCursor, b, off, bytesToRead);
-        bCursor += bytesToRead;
-        if (statistics != null) {
-            statistics.incrementBytesRead(bytesToRead);
-        }
-        return bytesToRead;
-    }
-
-
-    private int readInternal(final long position, final byte[] b, final int offset, final int length,
-                             final boolean bypassReadAhead) throws IOException {
-        if (readAheadEnabled && !bypassReadAhead) {
-            // try reading from read-ahead
-            if (offset != 0) {
-                throw new IllegalArgumentException("readahead buffers cannot have non-zero buffer offsets");
-            }
-            int receivedBytes;
-
-            // queue read-aheads
-            int numReadAheads = this.readAheadQueueDepth;
-            long nextSize;
-            long nextOffset = position;
-            while (numReadAheads > 0 && nextOffset < contentLength) {
-                nextSize = Math.min((long) bufferSize, contentLength - nextOffset);
-                ReadBufferManager.getBufferManager().queueReadAhead(this, nextOffset, (int) nextSize);
-                nextOffset = nextOffset + nextSize;
-                numReadAheads--;
-            }
-
-            // try reading from buffers first
-            receivedBytes = ReadBufferManager.getBufferManager().getBlock(this, position, length, b);
-            if (receivedBytes > 0) {
-                return receivedBytes;
-            }
-
-            // got nothing from read-ahead, do our own read now
-            receivedBytes = readRemote(position, b, offset, length);
-            return receivedBytes;
-        } else {
-            return readRemote(position, b, offset, length);
-        }
-    }
-
-    int readRemote(long position, byte[] b, int offset, int length) throws IOException {
         if (position < 0) {
             throw new IllegalArgumentException("attempting to read from negative offset");
         }
@@ -203,21 +77,30 @@ public class SeaweedInputStream extends FSInputStream {
         if (b == null) {
             throw new IllegalArgumentException("null byte array passed in to read() method");
         }
-        if (offset >= b.length) {
+        if (off >= b.length) {
             throw new IllegalArgumentException("offset greater than length of array");
         }
-        if (length < 0) {
+        if (len < 0) {
             throw new IllegalArgumentException("requested read length is less than zero");
         }
-        if (length > (b.length - offset)) {
+        if (len > (b.length - off)) {
             throw new IllegalArgumentException("requested read length is more than will fit after requested offset in buffer");
         }
 
-        long bytesRead = SeaweedRead.read(filerGrpcClient, visibleIntervalList, position, b, offset, length);
+        long bytesRead = SeaweedRead.read(this.filerGrpcClient, this.visibleIntervalList, this.position, b, off, len, SeaweedRead.fileSize(entry));
         if (bytesRead > Integer.MAX_VALUE) {
             throw new IOException("Unexpected Content-Length");
         }
+
+        if (bytesRead > 0) {
+            this.position += bytesRead;
+            if (statistics != null) {
+                statistics.incrementBytesRead(bytesRead);
+            }
+        }
+
         return (int) bytesRead;
+
     }
 
     /**
@@ -239,17 +122,8 @@ public class SeaweedInputStream extends FSInputStream {
             throw new EOFException(FSExceptionMessages.CANNOT_SEEK_PAST_EOF);
         }
 
-        if (n >= fCursor - limit && n <= fCursor) { // within buffer
-            bCursor = (int) (n - (fCursor - limit));
-            return;
-        }
+        this.position = n;
 
-        // next read will read from here
-        fCursor = n;
-
-        //invalidate buffer
-        limit = 0;
-        bCursor = 0;
     }
 
     @Override
@@ -257,20 +131,19 @@ public class SeaweedInputStream extends FSInputStream {
         if (closed) {
             throw new IOException(FSExceptionMessages.STREAM_IS_CLOSED);
         }
-        long currentPos = getPos();
-        if (currentPos == contentLength) {
+        if (this.position == contentLength) {
             if (n > 0) {
                 throw new EOFException(FSExceptionMessages.CANNOT_SEEK_PAST_EOF);
             }
         }
-        long newPos = currentPos + n;
+        long newPos = this.position + n;
         if (newPos < 0) {
             newPos = 0;
-            n = newPos - currentPos;
+            n = newPos - this.position;
         }
         if (newPos > contentLength) {
             newPos = contentLength;
-            n = newPos - currentPos;
+            n = newPos - this.position;
         }
         seek(newPos);
         return n;
@@ -289,11 +162,11 @@ public class SeaweedInputStream extends FSInputStream {
     public synchronized int available() throws IOException {
         if (closed) {
             throw new IOException(
-                FSExceptionMessages.STREAM_IS_CLOSED);
+                    FSExceptionMessages.STREAM_IS_CLOSED);
         }
         final long remaining = this.contentLength - this.getPos();
         return remaining <= Integer.MAX_VALUE
-            ? (int) remaining : Integer.MAX_VALUE;
+                ? (int) remaining : Integer.MAX_VALUE;
     }
 
     /**
@@ -321,7 +194,7 @@ public class SeaweedInputStream extends FSInputStream {
         if (closed) {
             throw new IOException(FSExceptionMessages.STREAM_IS_CLOSED);
         }
-        return fCursor - limit + bCursor;
+        return position;
     }
 
     /**
@@ -338,7 +211,6 @@ public class SeaweedInputStream extends FSInputStream {
     @Override
     public synchronized void close() throws IOException {
         closed = true;
-        buffer = null; // de-reference the buffer so it can be GC'ed sooner
     }
 
     /**

other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedOutputStream.java

@@ -9,6 +9,7 @@ import org.apache.hadoop.fs.StreamCapabilities;
 import org.apache.hadoop.fs.Syncable;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import seaweedfs.client.ByteBufferPool;
 import seaweedfs.client.FilerGrpcClient;
 import seaweedfs.client.FilerProto;
 import seaweedfs.client.SeaweedWrite;
@@ -16,14 +17,10 @@ import seaweedfs.client.SeaweedWrite;
 import java.io.IOException;
 import java.io.InterruptedIOException;
 import java.io.OutputStream;
+import java.nio.ByteBuffer;
+import java.util.Arrays;
 import java.util.Locale;
-import java.util.concurrent.Callable;
-import java.util.concurrent.ConcurrentLinkedDeque;
-import java.util.concurrent.ExecutorCompletionService;
-import java.util.concurrent.Future;
-import java.util.concurrent.LinkedBlockingQueue;
-import java.util.concurrent.ThreadPoolExecutor;
-import java.util.concurrent.TimeUnit;
+import java.util.concurrent.*;
 
 import static seaweed.hdfs.SeaweedFileSystemStore.getParentDirectory;
 
@@ -37,16 +34,16 @@ public class SeaweedOutputStream extends OutputStream implements Syncable, Strea
     private final int maxConcurrentRequestCount;
     private final ThreadPoolExecutor threadExecutor;
     private final ExecutorCompletionService<Void> completionService;
-    private FilerProto.Entry.Builder entry;
+    private final FilerProto.Entry.Builder entry;
+    private final boolean supportFlush = false; // true;
+    private final ConcurrentLinkedDeque<WriteOperation> writeOperations;
     private long position;
     private boolean closed;
-    private boolean supportFlush = true;
     private volatile IOException lastError;
     private long lastFlushOffset;
     private long lastTotalAppendOffset = 0;
-    private byte[] buffer;
-    private int bufferIndex;
-    private ConcurrentLinkedDeque<WriteOperation> writeOperations;
+    private ByteBuffer buffer;
+    private long outputIndex;
     private String replication = "000";
 
     public SeaweedOutputStream(FilerGrpcClient filerGrpcClient, final Path path, FilerProto.Entry.Builder entry,
@@ -59,18 +56,18 @@ public class SeaweedOutputStream extends OutputStream implements Syncable, Strea
         this.lastError = null;
         this.lastFlushOffset = 0;
         this.bufferSize = bufferSize;
-        this.buffer = new byte[bufferSize];
-        this.bufferIndex = 0;
+        this.buffer = ByteBufferPool.request(bufferSize);
+        this.outputIndex = 0;
         this.writeOperations = new ConcurrentLinkedDeque<>();
 
-        this.maxConcurrentRequestCount = 4 * Runtime.getRuntime().availableProcessors();
+        this.maxConcurrentRequestCount = Runtime.getRuntime().availableProcessors();
 
         this.threadExecutor
-            = new ThreadPoolExecutor(maxConcurrentRequestCount,
-            maxConcurrentRequestCount,
-            10L,
-            TimeUnit.SECONDS,
-            new LinkedBlockingQueue<Runnable>());
+                = new ThreadPoolExecutor(maxConcurrentRequestCount,
+                maxConcurrentRequestCount,
+                120L,
+                TimeUnit.SECONDS,
+                new LinkedBlockingQueue<Runnable>());
         this.completionService = new ExecutorCompletionService<>(this.threadExecutor);
 
         this.entry = entry;
@@ -78,9 +75,6 @@ public class SeaweedOutputStream extends OutputStream implements Syncable, Strea
     }
 
     private synchronized void flushWrittenBytesToServiceInternal(final long offset) throws IOException {
-
-        LOG.debug("SeaweedWrite.writeMeta path: {} entry:{}", path, entry);
-
         try {
             SeaweedWrite.writeMeta(filerGrpcClient, getParentDirectory(path), entry);
         } catch (Exception ex) {
@@ -96,7 +90,7 @@ public class SeaweedOutputStream extends OutputStream implements Syncable, Strea
 
     @Override
     public synchronized void write(final byte[] data, final int off, final int length)
-        throws IOException {
+            throws IOException {
         maybeThrowLastError();
 
         Preconditions.checkArgument(data != null, "null data");
@@ -105,25 +99,29 @@ public class SeaweedOutputStream extends OutputStream implements Syncable, Strea
             throw new IndexOutOfBoundsException();
         }
 
+        // System.out.println(path + " write [" + (outputIndex + off) + "," + ((outputIndex + off) + length) + ")");
+
         int currentOffset = off;
-        int writableBytes = bufferSize - bufferIndex;
+        int writableBytes = bufferSize - buffer.position();
         int numberOfBytesToWrite = length;
 
         while (numberOfBytesToWrite > 0) {
-            if (writableBytes <= numberOfBytesToWrite) {
-                System.arraycopy(data, currentOffset, buffer, bufferIndex, writableBytes);
-                bufferIndex += writableBytes;
-                writeCurrentBufferToService();
-                currentOffset += writableBytes;
-                numberOfBytesToWrite = numberOfBytesToWrite - writableBytes;
-            } else {
-                System.arraycopy(data, currentOffset, buffer, bufferIndex, numberOfBytesToWrite);
-                bufferIndex += numberOfBytesToWrite;
-                numberOfBytesToWrite = 0;
+
+            if (numberOfBytesToWrite < writableBytes) {
+                buffer.put(data, currentOffset, numberOfBytesToWrite);
+                outputIndex += numberOfBytesToWrite;
+                break;
             }
 
-            writableBytes = bufferSize - bufferIndex;
+            // System.out.println(path + "     [" + (outputIndex + currentOffset) + "," + ((outputIndex + currentOffset) + writableBytes) + ") " + buffer.capacity());
+            buffer.put(data, currentOffset, writableBytes);
+            outputIndex += writableBytes;
+            currentOffset += writableBytes;
+            writeCurrentBufferToService();
+            numberOfBytesToWrite = numberOfBytesToWrite - writableBytes;
+            writableBytes = bufferSize - buffer.position();
         }
+
     }
 
     /**
@@ -202,8 +200,9 @@ public class SeaweedOutputStream extends OutputStream implements Syncable, Strea
             threadExecutor.shutdown();
         } finally {
             lastError = new IOException(FSExceptionMessages.STREAM_IS_CLOSED);
+            ByteBufferPool.release(buffer);
             buffer = null;
-            bufferIndex = 0;
+            outputIndex = 0;
             closed = true;
             writeOperations.clear();
             if (!threadExecutor.isShutdown()) {
@@ -213,35 +212,39 @@ public class SeaweedOutputStream extends OutputStream implements Syncable, Strea
     }
 
     private synchronized void writeCurrentBufferToService() throws IOException {
-        if (bufferIndex == 0) {
+        if (buffer.position() == 0) {
             return;
         }
 
-        final byte[] bytes = buffer;
-        final int bytesLength = bufferIndex;
+        position += submitWriteBufferToService(buffer, position);
 
-        buffer = new byte[bufferSize];
-        bufferIndex = 0;
-        final long offset = position;
-        position += bytesLength;
+        buffer = ByteBufferPool.request(bufferSize);
 
-        if (threadExecutor.getQueue().size() >= maxConcurrentRequestCount * 2) {
+    }
+
+    private synchronized int submitWriteBufferToService(final ByteBuffer bufferToWrite, final long writePosition) throws IOException {
+
+        bufferToWrite.flip();
+        int bytesLength = bufferToWrite.limit() - bufferToWrite.position();
+
+        if (threadExecutor.getQueue().size() >= maxConcurrentRequestCount) {
             waitForTaskToComplete();
         }
-
-        final Future<Void> job = completionService.submit(new Callable<Void>() {
-            @Override
-            public Void call() throws Exception {
-                // originally: client.append(path, offset, bytes, 0, bytesLength);
-                SeaweedWrite.writeData(entry, replication, filerGrpcClient, offset, bytes, 0, bytesLength);
-                return null;
-            }
+        final Future<Void> job = completionService.submit(() -> {
+            // System.out.println(path + " is going to save [" + (writePosition) + "," + ((writePosition) + bytesLength) + ")");
+            SeaweedWrite.writeData(entry, replication, filerGrpcClient, writePosition, bufferToWrite.array(), bufferToWrite.position(), bufferToWrite.limit());
+            // System.out.println(path + " saved [" + (writePosition) + "," + ((writePosition) + bytesLength) + ")");
+            ByteBufferPool.release(bufferToWrite);
+            return null;
         });
 
-        writeOperations.add(new WriteOperation(job, offset, bytesLength));
+        writeOperations.add(new WriteOperation(job, writePosition, bytesLength));
 
         // Try to shrink the queue
         shrinkWriteOperationQueue();
+
+        return bytesLength;
+
     }
 
     private void waitForTaskToComplete() throws IOException {

snap/README.md

@@ -0,0 +1,49 @@
+Hi
+
+This PR adds support for building a snap package of seaweedfs. Snaps are cross distro Linux software packages. One snap can be installed on Ubuntu all supported LTS and non LTS releases from 14.04 onward. Additionally they can installed on Debian, Manjaro, Fedora, OpenSUSE and others. Making a snap of seaweedfs enables you to provide automatic updates on your schedule to your users via the snap store.
+
+If accepted, you can use snapcraft locally, a CI system such as travis or circle-ci, or our free build system (build.snapcraft.io) to create snaps and upload to the store (snapcraft.io/store). The store supports 
+
+To test this PR locally, I used an Ubuntu 16.04 VM, with the following steps.
+
+```
+snap install snapcraft --classic
+git clone https://github.com/popey/seaweedfs
+cd seaweedfs
+git checkout add-snapcraft
+snapcraft
+```
+
+The generated a .snap file from the tip of master (I could have checked out a stable release instead). It can be installed with:-
+
+    snap install seaweedfs_0.99+git30.79371c0-dirty_amd64.snap --dangerous
+
+(the --dangerous is necessary because we’re installing an app which hasn’t gone through the snap store review process)
+
+Once installed, the (namespaced) weed command can be executed. If you accept this and land the snap in the store, we can request an ‘alias’ so users can use the ‘weed’ command rather than the namespaced ‘seaweedfs.weed’
+
+- Run the command
+-  Create sample config. Snaps are securely confined so their home directory is in a different place
+    mkdir ~/snap/seaweedfs/current/.seaweedfs
+    seaweedfs.weed scaffold > ~/snap/seaweed/current/.seaweedfs/filer.toml
+- Run a server
+    seaweedfs.weed server
+- Run a benchmark
+    seaweedfs.weed benchmark
+
+Results from my test run: https://paste.ubuntu.com/p/95Xk8zFQ7w/
+
+If landed, you will need to:-
+
+- Register an account in the snap store https://snapcraft.io/account
+- Register the ‘seaweedfs’ name in the store 
+  - snapcraft login
+  - snapcraft register seaweedfs
+- Upload a built snap to the store
+  - snapcraft push seaweedfs_0.99+git30.79371c0-dirty_amd64.snap --release edge
+- Test installing on a clean Ubuntu 16.04 machine
+  - snap install seaweedfs --edge
+
+The store supports multiple risk levels as “channels” with the edge channel typically used to host the latest build from git master. Stable is where stable releases are pushed. Optionally beta and candidate channels can also be used if needed.
+
+Once you are happy, you can push a stable release to the stable channel, update the store page, and promote the application online (we can help there).

snap/snapcraft.yaml

@@ -0,0 +1,53 @@
+# Name of snap as registered in the store
+name: seaweedfs
+# Automatically derive snap version from git  tags
+version: git
+# Short human readable name as seen in 'snap find $SNAPNAME'
+summary: SeaweedFS
+# Longer multi-line description found in 'snap info $SNAPNAME'
+description: |
+  SeaweedFS is a simple and highly scalable distributed file system,
+  to store and serve billions of files fast!
+  SeaweedFS implements an object store with O(1) disk seek,
+  transparent cloud integration, and an optional Filer with POSIX interface,
+  supporting S3 API, Rack-Aware Erasure Coding for warm storage,
+  FUSE mount, Hadoop compatible, WebDAV.
+
+# Grade is stable for snaps expected to land in the stable channel
+grade: stable
+# Uses the strict confinement model and uses interfaces to open up access to
+# resources on the target host
+confinement: strict
+
+# List of parts which comprise the snap
+parts:
+  # The main part which defines how to build the application in the snap
+  seaweedfs:
+    # This part needs a newer version of golang, so we use a separate part
+    # which defines how to get a newer golang during the build
+    after: [go]
+    # The go plugin knows how to build go applications into a snap
+    plugin: go
+    # Snapcraft will look in this location for the source of the application
+    source: .
+    go-importpath: github.com/chrislusf/seaweedfs
+  go:
+    # Defines the version of golang which will be bootstrapped into the snap
+    source-tag: go1.14
+
+# Apps exposes the binaries inside the snap to the host system once installed
+apps:
+  # We expose the weed command.
+  # This differs from the snap name, so it will be namespaced as seaweedfs.weed
+  # An alias can be added to expose this as 'weed' if requested in the snapcraft forum
+  weed:
+    # The path to the binary inside the snap, relative to the $SNAP home
+    command: bin/weed
+    # Plugs connect the snap to resources on the host system. We enable network connectivity
+    # We also add home and removable-media (latter not autoconnected by default)
+    # so users can access files in their home or on removable disks
+    plugs:
+      - network
+      - network-bind
+      - home
+      - removable-media

test/random_access/pom.xml

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.seaweedfs.test</groupId>
+    <artifactId>random_access</artifactId>
+    <packaging>jar</packaging>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <guava.version>28.0-jre</guava.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>1.7.25</version>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.esotericsoftware.kryo</groupId>
+            <artifactId>kryo</artifactId>
+            <version>2.24.0</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <extensions>
+            <extension>
+                <groupId>kr.motd.maven</groupId>
+                <artifactId>os-maven-plugin</artifactId>
+                <version>1.6.2</version>
+            </extension>
+        </extensions>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>8</source>
+                    <target>8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

test/random_access/src/main/java/seaweedfs/client/btree/BTreePersistentIndexedCache.java

@@ -0,0 +1,753 @@
+/*
+ * Copyright 2010 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package seaweedfs.client.btree;
+
+import com.google.common.collect.ImmutableSet;
+import seaweedfs.client.btree.serialize.Serializer;
+import seaweedfs.client.btree.serialize.kryo.KryoBackedDecoder;
+import seaweedfs.client.btree.serialize.kryo.KryoBackedEncoder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+// todo - stream serialised value to file
+// todo - handle hash collisions (properly, this time)
+// todo - don't store null links to child blocks in leaf index blocks
+// todo - align block boundaries
+// todo - thread safety control
+// todo - merge small values into a single data block
+// todo - discard when file corrupt
+// todo - include data directly in index entry when serializer can guarantee small fixed sized data
+// todo - free list leaks disk space
+// todo - merge adjacent free blocks
+// todo - use more efficient lookup for free block with nearest size
+@SuppressWarnings("unchecked")
+public class BTreePersistentIndexedCache<K, V> {
+    private static final Logger LOGGER = LoggerFactory.getLogger(BTreePersistentIndexedCache.class);
+    private final File cacheFile;
+    private final KeyHasher<K> keyHasher;
+    private final Serializer<V> serializer;
+    private final short maxChildIndexEntries;
+    private final int minIndexChildNodes;
+    private final StateCheckBlockStore store;
+    private HeaderBlock header;
+
+    public BTreePersistentIndexedCache(File cacheFile, Serializer<K> keySerializer, Serializer<V> valueSerializer) {
+        this(cacheFile, keySerializer, valueSerializer, (short) 512, 512);
+    }
+
+    public BTreePersistentIndexedCache(File cacheFile, Serializer<K> keySerializer, Serializer<V> valueSerializer,
+                                       short maxChildIndexEntries, int maxFreeListEntries) {
+        this.cacheFile = cacheFile;
+        this.keyHasher = new KeyHasher<K>(keySerializer);
+        this.serializer = valueSerializer;
+        this.maxChildIndexEntries = maxChildIndexEntries;
+        this.minIndexChildNodes = maxChildIndexEntries / 2;
+        BlockStore cachingStore = new CachingBlockStore(new FileBackedBlockStore(cacheFile), ImmutableSet.of(IndexBlock.class, FreeListBlockStore.FreeListBlock.class));
+        this.store = new StateCheckBlockStore(new FreeListBlockStore(cachingStore, maxFreeListEntries));
+        try {
+            open();
+        } catch (Exception e) {
+            throw new UncheckedIOException(String.format("Could not open %s.", this), e);
+        }
+    }
+
+    @Override
+    public String toString() {
+        return "cache " + cacheFile.getName() + " (" + cacheFile + ")";
+    }
+
+    private void open() throws Exception {
+        LOGGER.debug("Opening {}", this);
+        try {
+            doOpen();
+        } catch (CorruptedCacheException e) {
+            rebuild();
+        }
+    }
+
+    private void doOpen() throws Exception {
+        BlockStore.Factory factory = new BlockStore.Factory() {
+            @Override
+            public Object create(Class<? extends BlockPayload> type) {
+                if (type == HeaderBlock.class) {
+                    return new HeaderBlock();
+                }
+                if (type == IndexBlock.class) {
+                    return new IndexBlock();
+                }
+                if (type == DataBlock.class) {
+                    return new DataBlock();
+                }
+                throw new UnsupportedOperationException();
+            }
+        };
+        Runnable initAction = new Runnable() {
+            @Override
+            public void run() {
+                header = new HeaderBlock();
+                store.write(header);
+                header.index.newRoot();
+                store.flush();
+            }
+        };
+
+        store.open(initAction, factory);
+        header = store.readFirst(HeaderBlock.class);
+    }
+
+    public V get(K key) {
+        try {
+            try {
+                DataBlock block = header.getRoot().get(key);
+                if (block != null) {
+                    return block.getValue();
+                }
+                return null;
+            } catch (CorruptedCacheException e) {
+                rebuild();
+                return null;
+            }
+        } catch (Exception e) {
+            throw new UncheckedIOException(String.format("Could not read entry '%s' from %s.", key, this), e);
+        }
+    }
+
+    public void put(K key, V value) {
+        try {
+            long hashCode = keyHasher.getHashCode(key);
+            Lookup lookup = header.getRoot().find(hashCode);
+            DataBlock newBlock = null;
+            if (lookup.entry != null) {
+                DataBlock block = store.read(lookup.entry.dataBlock, DataBlock.class);
+                DataBlockUpdateResult updateResult = block.useNewValue(value);
+                if (updateResult.isFailed()) {
+                    store.remove(block);
+                    newBlock = new DataBlock(value, updateResult.getSerializedValue());
+                }
+            } else {
+                newBlock = new DataBlock(value);
+            }
+            if (newBlock != null) {
+                store.write(newBlock);
+                lookup.indexBlock.put(hashCode, newBlock.getPos());
+            }
+            store.flush();
+        } catch (Exception e) {
+            throw new UncheckedIOException(String.format("Could not add entry '%s' to %s.", key, this), e);
+        }
+    }
+
+    public void remove(K key) {
+        try {
+            Lookup lookup = header.getRoot().find(key);
+            if (lookup.entry == null) {
+                return;
+            }
+            lookup.indexBlock.remove(lookup.entry);
+            DataBlock block = store.read(lookup.entry.dataBlock, DataBlock.class);
+            store.remove(block);
+            store.flush();
+        } catch (Exception e) {
+            throw new UncheckedIOException(String.format("Could not remove entry '%s' from %s.", key, this), e);
+        }
+    }
+
+    private IndexBlock load(BlockPointer pos, IndexRoot root, IndexBlock parent, int index) {
+        IndexBlock block = store.read(pos, IndexBlock.class);
+        block.root = root;
+        block.parent = parent;
+        block.parentEntryIndex = index;
+        return block;
+    }
+
+    public void reset() {
+        close();
+        try {
+            open();
+        } catch (Exception e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    public void close() {
+        LOGGER.debug("Closing {}", this);
+        try {
+            store.close();
+        } catch (Exception e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    public boolean isOpen() {
+        return store.isOpen();
+    }
+
+    private void rebuild() {
+        LOGGER.warn("{} is corrupt. Discarding.", this);
+        try {
+            clear();
+        } catch (Exception e) {
+            LOGGER.warn("{} couldn't be rebuilt. Closing.", this);
+            close();
+        }
+    }
+
+    public void verify() {
+        try {
+            doVerify();
+        } catch (Exception e) {
+            throw new UncheckedIOException(String.format("Some problems were found when checking the integrity of %s.",
+                    this), e);
+        }
+    }
+
+    private void doVerify() throws Exception {
+        List<BlockPayload> blocks = new ArrayList<BlockPayload>();
+
+        HeaderBlock header = store.readFirst(HeaderBlock.class);
+        blocks.add(header);
+        verifyTree(header.getRoot(), "", blocks, Long.MAX_VALUE, true);
+
+        Collections.sort(blocks, new Comparator<BlockPayload>() {
+            @Override
+            public int compare(BlockPayload block, BlockPayload block1) {
+                return block.getPos().compareTo(block1.getPos());
+            }
+        });
+
+        for (int i = 0; i < blocks.size() - 1; i++) {
+            Block b1 = blocks.get(i).getBlock();
+            Block b2 = blocks.get(i + 1).getBlock();
+            if (b1.getPos().getPos() + b1.getSize() > b2.getPos().getPos()) {
+                throw new IOException(String.format("%s overlaps with %s", b1, b2));
+            }
+        }
+    }
+
+    private void verifyTree(IndexBlock current, String prefix, Collection<BlockPayload> blocks, long maxValue,
+                            boolean loadData) throws Exception {
+        blocks.add(current);
+
+        if (!prefix.equals("") && current.entries.size() < maxChildIndexEntries / 2) {
+            throw new IOException(String.format("Too few entries found in %s", current));
+        }
+        if (current.entries.size() > maxChildIndexEntries) {
+            throw new IOException(String.format("Too many entries found in %s", current));
+        }
+
+        boolean isLeaf = current.entries.size() == 0 || current.entries.get(0).childIndexBlock.isNull();
+        if (isLeaf ^ current.tailPos.isNull()) {
+            throw new IOException(String.format("Mismatched leaf/tail-node in %s", current));
+        }
+
+        long min = Long.MIN_VALUE;
+        for (IndexEntry entry : current.entries) {
+            if (isLeaf ^ entry.childIndexBlock.isNull()) {
+                throw new IOException(String.format("Mismatched leaf/non-leaf entry in %s", current));
+            }
+            if (entry.hashCode >= maxValue || entry.hashCode <= min) {
+                throw new IOException(String.format("Out-of-order key in %s", current));
+            }
+            min = entry.hashCode;
+            if (!entry.childIndexBlock.isNull()) {
+                IndexBlock child = store.read(entry.childIndexBlock, IndexBlock.class);
+                verifyTree(child, "   " + prefix, blocks, entry.hashCode, loadData);
+            }
+            if (loadData) {
+                DataBlock block = store.read(entry.dataBlock, DataBlock.class);
+                blocks.add(block);
+            }
+        }
+        if (!current.tailPos.isNull()) {
+            IndexBlock tail = store.read(current.tailPos, IndexBlock.class);
+            verifyTree(tail, "   " + prefix, blocks, maxValue, loadData);
+        }
+    }
+
+    public void clear() {
+        store.clear();
+        close();
+        try {
+            doOpen();
+        } catch (Exception e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    private class IndexRoot {
+        private BlockPointer rootPos = BlockPointer.start();
+        private HeaderBlock owner;
+
+        private IndexRoot(HeaderBlock owner) {
+            this.owner = owner;
+        }
+
+        public void setRootPos(BlockPointer rootPos) {
+            this.rootPos = rootPos;
+            store.write(owner);
+        }
+
+        public IndexBlock getRoot() {
+            return load(rootPos, this, null, 0);
+        }
+
+        public IndexBlock newRoot() {
+            IndexBlock block = new IndexBlock();
+            store.write(block);
+            setRootPos(block.getPos());
+            return block;
+        }
+    }
+
+    private class HeaderBlock extends BlockPayload {
+        private IndexRoot index;
+
+        private HeaderBlock() {
+            index = new IndexRoot(this);
+        }
+
+        @Override
+        protected byte getType() {
+            return 0x55;
+        }
+
+        @Override
+        protected int getSize() {
+            return Block.LONG_SIZE + Block.SHORT_SIZE;
+        }
+
+        @Override
+        protected void read(DataInputStream instr) throws Exception {
+            index.rootPos = BlockPointer.pos(instr.readLong());
+
+            short actualChildIndexEntries = instr.readShort();
+            if (actualChildIndexEntries != maxChildIndexEntries) {
+                throw blockCorruptedException();
+            }
+        }
+
+        @Override
+        protected void write(DataOutputStream outstr) throws Exception {
+            outstr.writeLong(index.rootPos.getPos());
+            outstr.writeShort(maxChildIndexEntries);
+        }
+
+        public IndexBlock getRoot() throws Exception {
+            return index.getRoot();
+        }
+    }
+
+    private class IndexBlock extends BlockPayload {
+        private final List<IndexEntry> entries = new ArrayList<IndexEntry>();
+        private BlockPointer tailPos = BlockPointer.start();
+        // Transient fields
+        private IndexBlock parent;
+        private int parentEntryIndex;
+        private IndexRoot root;
+
+        @Override
+        protected byte getType() {
+            return 0x77;
+        }
+
+        @Override
+        protected int getSize() {
+            return Block.INT_SIZE + Block.LONG_SIZE + (3 * Block.LONG_SIZE) * maxChildIndexEntries;
+        }
+
+        @Override
+        public void read(DataInputStream instr) throws IOException {
+            int count = instr.readInt();
+            entries.clear();
+            for (int i = 0; i < count; i++) {
+                IndexEntry entry = new IndexEntry();
+                entry.hashCode = instr.readLong();
+                entry.dataBlock = BlockPointer.pos(instr.readLong());
+                entry.childIndexBlock = BlockPointer.pos(instr.readLong());
+                entries.add(entry);
+            }
+            tailPos = BlockPointer.pos(instr.readLong());
+        }
+
+        @Override
+        public void write(DataOutputStream outstr) throws IOException {
+            outstr.writeInt(entries.size());
+            for (IndexEntry entry : entries) {
+                outstr.writeLong(entry.hashCode);
+                outstr.writeLong(entry.dataBlock.getPos());
+                outstr.writeLong(entry.childIndexBlock.getPos());
+            }
+            outstr.writeLong(tailPos.getPos());
+        }
+
+        public void put(long hashCode, BlockPointer pos) throws Exception {
+            int index = Collections.binarySearch(entries, new IndexEntry(hashCode));
+            IndexEntry entry;
+            if (index >= 0) {
+                entry = entries.get(index);
+            } else {
+                assert tailPos.isNull();
+                entry = new IndexEntry();
+                entry.hashCode = hashCode;
+                entry.childIndexBlock = BlockPointer.start();
+                index = -index - 1;
+                entries.add(index, entry);
+            }
+
+            entry.dataBlock = pos;
+            store.write(this);
+
+            maybeSplit();
+        }
+
+        private void maybeSplit() throws Exception {
+            if (entries.size() > maxChildIndexEntries) {
+                int splitPos = entries.size() / 2;
+                IndexEntry splitEntry = entries.remove(splitPos);
+                if (parent == null) {
+                    parent = root.newRoot();
+                }
+                IndexBlock sibling = new IndexBlock();
+                store.write(sibling);
+                List<IndexEntry> siblingEntries = entries.subList(splitPos, entries.size());
+                sibling.entries.addAll(siblingEntries);
+                siblingEntries.clear();
+                sibling.tailPos = tailPos;
+                tailPos = splitEntry.childIndexBlock;
+                splitEntry.childIndexBlock = BlockPointer.start();
+                parent.add(this, splitEntry, sibling);
+            }
+        }
+
+        private void add(IndexBlock left, IndexEntry entry, IndexBlock right) throws Exception {
+            int index = left.parentEntryIndex;
+            if (index < entries.size()) {
+                IndexEntry parentEntry = entries.get(index);
+                assert parentEntry.childIndexBlock.equals(left.getPos());
+                parentEntry.childIndexBlock = right.getPos();
+            } else {
+                assert index == entries.size() && (tailPos.isNull() || tailPos.equals(left.getPos()));
+                tailPos = right.getPos();
+            }
+            entries.add(index, entry);
+            entry.childIndexBlock = left.getPos();
+            store.write(this);
+
+            maybeSplit();
+        }
+
+        public DataBlock get(K key) throws Exception {
+            Lookup lookup = find(key);
+            if (lookup.entry == null) {
+                return null;
+            }
+
+            return store.read(lookup.entry.dataBlock, DataBlock.class);
+        }
+
+        public Lookup find(K key) throws Exception {
+            long checksum = keyHasher.getHashCode(key);
+            return find(checksum);
+        }
+
+        private Lookup find(long hashCode) throws Exception {
+            int index = Collections.binarySearch(entries, new IndexEntry(hashCode));
+            if (index >= 0) {
+                return new Lookup(this, entries.get(index));
+            }
+
+            index = -index - 1;
+            BlockPointer childBlockPos;
+            if (index == entries.size()) {
+                childBlockPos = tailPos;
+            } else {
+                childBlockPos = entries.get(index).childIndexBlock;
+            }
+            if (childBlockPos.isNull()) {
+                return new Lookup(this, null);
+            }
+
+            IndexBlock childBlock = load(childBlockPos, root, this, index);
+            return childBlock.find(hashCode);
+        }
+
+        public void remove(IndexEntry entry) throws Exception {
+            int index = entries.indexOf(entry);
+            assert index >= 0;
+            entries.remove(index);
+            store.write(this);
+
+            if (entry.childIndexBlock.isNull()) {
+                maybeMerge();
+            } else {
+                // Not a leaf node. Move up an entry from a leaf node, then possibly merge the leaf node
+                IndexBlock leafBlock = load(entry.childIndexBlock, root, this, index);
+                leafBlock = leafBlock.findHighestLeaf();
+                IndexEntry highestEntry = leafBlock.entries.remove(leafBlock.entries.size() - 1);
+                highestEntry.childIndexBlock = entry.childIndexBlock;
+                entries.add(index, highestEntry);
+                store.write(leafBlock);
+                leafBlock.maybeMerge();
+            }
+        }
+
+        private void maybeMerge() throws Exception {
+            if (parent == null) {
+                // This is the root block. Can have any number of children <= maxChildIndexEntries
+                if (entries.size() == 0 && !tailPos.isNull()) {
+                    // This is an empty root block, discard it
+                    header.index.setRootPos(tailPos);
+                    store.remove(this);
+                }
+                return;
+            }
+
+            // This is not the root block. Must have children >= minIndexChildNodes
+            if (entries.size() >= minIndexChildNodes) {
+                return;
+            }
+
+            // Attempt to merge with the left sibling
+            IndexBlock left = parent.getPrevious(this);
+            if (left != null) {
+                assert entries.size() + left.entries.size() <= maxChildIndexEntries * 2;
+                if (left.entries.size() > minIndexChildNodes) {
+                    // There are enough entries in this block and the left sibling to make up 2 blocks, so redistribute
+                    // the entries evenly between them
+                    left.mergeFrom(this);
+                    left.maybeSplit();
+                    return;
+                } else {
+                    // There are only enough entries to make up 1 block, so move the entries of the left sibling into
+                    // this block and discard the left sibling. Might also need to merge the parent
+                    left.mergeFrom(this);
+                    parent.maybeMerge();
+                    return;
+                }
+            }
+
+            // Attempt to merge with the right sibling
+            IndexBlock right = parent.getNext(this);
+            if (right != null) {
+                assert entries.size() + right.entries.size() <= maxChildIndexEntries * 2;
+                if (right.entries.size() > minIndexChildNodes) {
+                    // There are enough entries in this block and the right sibling to make up 2 blocks, so redistribute
+                    // the entries evenly between them
+                    mergeFrom(right);
+                    maybeSplit();
+                    return;
+                } else {
+                    // There are only enough entries to make up 1 block, so move the entries of the right sibling into
+                    // this block and discard this block. Might also need to merge the parent
+                    mergeFrom(right);
+                    parent.maybeMerge();
+                    return;
+                }
+            }
+
+            // Should not happen
+            throw new IllegalStateException(String.format("%s does not have any siblings.", getBlock()));
+        }
+
+        private void mergeFrom(IndexBlock right) throws Exception {
+            IndexEntry newChildEntry = parent.entries.remove(parentEntryIndex);
+            if (right.getPos().equals(parent.tailPos)) {
+                parent.tailPos = getPos();
+            } else {
+                IndexEntry newParentEntry = parent.entries.get(parentEntryIndex);
+                assert newParentEntry.childIndexBlock.equals(right.getPos());
+                newParentEntry.childIndexBlock = getPos();
+            }
+            entries.add(newChildEntry);
+            entries.addAll(right.entries);
+            newChildEntry.childIndexBlock = tailPos;
+            tailPos = right.tailPos;
+            store.write(parent);
+            store.write(this);
+            store.remove(right);
+        }
+
+        private IndexBlock getNext(IndexBlock indexBlock) throws Exception {
+            int index = indexBlock.parentEntryIndex + 1;
+            if (index > entries.size()) {
+                return null;
+            }
+            if (index == entries.size()) {
+                return load(tailPos, root, this, index);
+            }
+            return load(entries.get(index).childIndexBlock, root, this, index);
+        }
+
+        private IndexBlock getPrevious(IndexBlock indexBlock) throws Exception {
+            int index = indexBlock.parentEntryIndex - 1;
+            if (index < 0) {
+                return null;
+            }
+            return load(entries.get(index).childIndexBlock, root, this, index);
+        }
+
+        private IndexBlock findHighestLeaf() throws Exception {
+            if (tailPos.isNull()) {
+                return this;
+            }
+            return load(tailPos, root, this, entries.size()).findHighestLeaf();
+        }
+    }
+
+    private static class IndexEntry implements Comparable<IndexEntry> {
+        long hashCode;
+        BlockPointer dataBlock;
+        BlockPointer childIndexBlock;
+
+        private IndexEntry() {
+        }
+
+        private IndexEntry(long hashCode) {
+            this.hashCode = hashCode;
+        }
+
+        @Override
+        public int compareTo(IndexEntry indexEntry) {
+            if (hashCode > indexEntry.hashCode) {
+                return 1;
+            }
+            if (hashCode < indexEntry.hashCode) {
+                return -1;
+            }
+            return 0;
+        }
+    }
+
+    private class Lookup {
+        final IndexBlock indexBlock;
+        final IndexEntry entry;
+
+        private Lookup(IndexBlock indexBlock, IndexEntry entry) {
+            this.indexBlock = indexBlock;
+            this.entry = entry;
+        }
+    }
+
+    private class DataBlock extends BlockPayload {
+        private int size;
+        private StreamByteBuffer buffer;
+        private V value;
+
+        private DataBlock() {
+        }
+
+        public DataBlock(V value) throws Exception {
+            this.value = value;
+            setValue(value);
+            size = buffer.totalBytesUnread();
+        }
+
+        public DataBlock(V value, StreamByteBuffer buffer) throws Exception {
+            this.value = value;
+            this.buffer = buffer;
+            size = buffer.totalBytesUnread();
+        }
+
+        public void setValue(V value) throws Exception {
+            buffer = StreamByteBuffer.createWithChunkSizeInDefaultRange(size);
+            KryoBackedEncoder encoder = new KryoBackedEncoder(buffer.getOutputStream());
+            serializer.write(encoder, value);
+            encoder.flush();
+        }
+
+        public V getValue() throws Exception {
+            if (value == null) {
+                value = serializer.read(new KryoBackedDecoder(buffer.getInputStream()));
+                buffer = null;
+            }
+            return value;
+        }
+
+        @Override
+        protected byte getType() {
+            return 0x33;
+        }
+
+        @Override
+        protected int getSize() {
+            return 2 * Block.INT_SIZE + size;
+        }
+
+        @Override
+        public void read(DataInputStream instr) throws Exception {
+            size = instr.readInt();
+            int bytes = instr.readInt();
+            buffer = StreamByteBuffer.of(instr, bytes);
+        }
+
+        @Override
+        public void write(DataOutputStream outstr) throws Exception {
+            outstr.writeInt(size);
+            outstr.writeInt(buffer.totalBytesUnread());
+            buffer.writeTo(outstr);
+            buffer = null;
+        }
+
+        public DataBlockUpdateResult useNewValue(V value) throws Exception {
+            setValue(value);
+            boolean ok = buffer.totalBytesUnread() <= size;
+            if (ok) {
+                this.value = value;
+                store.write(this);
+                return DataBlockUpdateResult.success();
+            } else {
+                return DataBlockUpdateResult.failed(buffer);
+            }
+        }
+    }
+
+    private static class DataBlockUpdateResult {
+        private static final DataBlockUpdateResult SUCCESS = new DataBlockUpdateResult(true, null);
+        private final boolean success;
+        private final StreamByteBuffer serializedValue;
+
+        private DataBlockUpdateResult(boolean success, StreamByteBuffer serializedValue) {
+            this.success = success;
+            this.serializedValue = serializedValue;
+        }
+
+        static DataBlockUpdateResult success() {
+            return SUCCESS;
+        }
+
+        static DataBlockUpdateResult failed(StreamByteBuffer serializedValue) {
+            return new DataBlockUpdateResult(false, serializedValue);
+        }
+
+        public boolean isFailed() {
+            return !success;
+        }
+
+        public StreamByteBuffer getSerializedValue() {
+            return serializedValue;
+        }
+    }
+}

test/random_access/src/main/java/seaweedfs/client/btree/Block.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2009 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package seaweedfs.client.btree;
+
+public abstract class Block {
+    static final int LONG_SIZE = 8;
+    static final int INT_SIZE = 4;
+    static final int SHORT_SIZE = 2;
+
+    private BlockPayload payload;
+
+    protected Block(BlockPayload payload) {
+        this.payload = payload;
+        payload.setBlock(this);
+    }
+
+    public BlockPayload getPayload() {
+        return payload;
+    }
+
+    protected void detach() {
+        payload.setBlock(null);
+        payload = null;
+    }
+
+    public abstract BlockPointer getPos();
+
+    public abstract int getSize();
+
+    public abstract RuntimeException blockCorruptedException();
+
+    @Override
+    public String toString() {
+        return payload.getClass().getSimpleName() + " " + getPos();
+    }
+
+    public BlockPointer getNextPos() {
+        return BlockPointer.pos(getPos().getPos() + getSize());
+    }
+
+    public abstract boolean hasPos();
+
+    public abstract void setPos(BlockPointer pos);
+
+    public abstract void setSize(int size);
+}

test/random_access/src/main/java/seaweedfs/client/btree/BlockPayload.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2009 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package seaweedfs.client.btree;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+
+public abstract class BlockPayload {
+    private Block block;
+
+    public Block getBlock() {
+        return block;
+    }
+
+    public void setBlock(Block block) {
+        this.block = block;
+    }
+
+    public BlockPointer getPos() {
+        return getBlock().getPos();
+    }
+
+    public BlockPointer getNextPos() {
+        return getBlock().getNextPos();
+    }
+
+    protected abstract int getSize();
+
+    protected abstract byte getType();
+
+    protected abstract void read(DataInputStream inputStream) throws Exception;
+
+    protected abstract void write(DataOutputStream outputStream) throws Exception;
+
+    protected RuntimeException blockCorruptedException() {
+        return getBlock().blockCorruptedException();
+    }
+}

test/random_access/src/main/java/seaweedfs/client/btree/BlockPointer.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright 2009 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package seaweedfs.client.btree;
+
+import com.google.common.primitives.Longs;
+
+public class BlockPointer implements Comparable<BlockPointer> {
+
+    private static final BlockPointer NULL = new BlockPointer(-1);
+
+    public static BlockPointer start() {
+        return NULL;
+    }
+
+    public static BlockPointer pos(long pos) {
+        if (pos < -1) {
+            throw new CorruptedCacheException("block pointer must be >= -1, but was" + pos);
+        }
+        if (pos == -1) {
+            return NULL;
+        }
+        return new BlockPointer(pos);
+    }
+
+    private final long pos;
+
+    private BlockPointer(long pos) {
+        this.pos = pos;
+    }
+
+    public boolean isNull() {
+        return pos < 0;
+    }
+
+    public long getPos() {
+        return pos;
+    }
+
+    @Override
+    public String toString() {
+        return String.valueOf(pos);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null || obj.getClass() != getClass()) {
+            return false;
+        }
+        BlockPointer other = (BlockPointer) obj;
+        return pos == other.pos;
+    }
+
+    @Override
+    public int hashCode() {
+        return Longs.hashCode(pos);
+    }
+
+    @Override
+    public int compareTo(BlockPointer o) {
+        return Longs.compare(pos, o.pos);
+    }
+}

test/random_access/src/main/java/seaweedfs/client/btree/BlockStore.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2009 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package seaweedfs.client.btree;
+
+public interface BlockStore {
+    /**
+     * Opens this store, calling the given action if the store is empty.
+     */
+    void open(Runnable initAction, Factory factory);
+
+    /**
+     * Closes this store.
+     */
+    void close();
+
+    /**
+     * Discards all blocks from this store.
+     */
+    void clear();
+
+    /**
+     * Removes the given block from this store.
+     */
+    void remove(BlockPayload block);
+
+    /**
+     * Reads the first block from this store.
+     */
+    <T extends BlockPayload> T readFirst(Class<T> payloadType);
+    
+    /**
+     * Reads a block from this store.
+     */
+    <T extends BlockPayload> T read(BlockPointer pos, Class<T> payloadType);
+
+    /**
+     * Writes a block to this store, adding the block if required.
+     */
+    void write(BlockPayload block);
+
+    /**
+     * Adds a new block to this store. Allocates space for the block, but does not write the contents of the block
+     * until {@link #write(BlockPayload)} is called.
+     */
+    void attach(BlockPayload block);
+
+    /**
+     * Flushes any pending updates for this store.
+     */
+    void flush();
+
+    interface Factory {
+        Object create(Class<? extends BlockPayload> type);
+    }
+}

test/random_access/src/main/java/seaweedfs/client/btree/BufferCaster.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2018 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package seaweedfs.client.btree;
+
+import java.nio.Buffer;
+
+public class BufferCaster {
+    /**
+     * Without this cast, when the code compiled by Java 9+ is executed on Java 8, it will throw
+     * java.lang.NoSuchMethodError: Method flip()Ljava/nio/ByteBuffer; does not exist in class java.nio.ByteBuffer
+     */
+    @SuppressWarnings("RedundantCast")
+    public static <T extends Buffer> Buffer cast(T byteBuffer) {
+        return (Buffer) byteBuffer;
+    }
+}

test/random_access/src/main/java/seaweedfs/client/btree/ByteInput.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package seaweedfs.client.btree;
+
+import com.google.common.io.CountingInputStream;
+
+import java.io.BufferedInputStream;
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.RandomAccessFile;
+
+/**
+ * Allows a stream of bytes to be read from a particular location of some backing byte stream.
+ */
+class ByteInput {
+    private final RandomAccessFile file;
+    private final ResettableBufferedInputStream bufferedInputStream;
+    private CountingInputStream countingInputStream;
+
+    public ByteInput(RandomAccessFile file) {
+        this.file = file;
+        bufferedInputStream = new ResettableBufferedInputStream(new RandomAccessFileInputStream(file));
+    }
+
+    /**
+     * Starts reading from the given offset.
+     */
+    public DataInputStream start(long offset) throws IOException {
+        file.seek(offset);
+        bufferedInputStream.clear();
+        countingInputStream = new CountingInputStream(bufferedInputStream);
+        return new DataInputStream(countingInputStream);
+    }
+
+    /**
+     * Returns the number of bytes read since {@link #start(long)} was called.
+     */
+    public long getBytesRead() {
+        return countingInputStream.getCount();
+    }
+
+    /**
+     * Finishes reading, resetting any buffered state.
+     */
+    public void done() {
+        countingInputStream = null;
+    }
+
+    private static class ResettableBufferedInputStream extends BufferedInputStream {
+        ResettableBufferedInputStream(InputStream input) {
+            super(input);
+        }
+
+        void clear() {
+            count = 0;
+            pos = 0;
+        }
+    }
+}

test/random_access/src/main/java/seaweedfs/client/btree/ByteOutput.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package seaweedfs.client.btree;
+
+import com.google.common.io.CountingOutputStream;
+
+import java.io.BufferedOutputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.RandomAccessFile;
+
+/**
+ * Allows a stream of bytes to be written to a particular location of some backing byte stream.
+ */
+class ByteOutput {
+    private final RandomAccessFile file;
+    private final ResettableBufferedOutputStream bufferedOutputStream;
+    private CountingOutputStream countingOutputStream;
+
+    public ByteOutput(RandomAccessFile file) {
+        this.file = file;
+        bufferedOutputStream = new ResettableBufferedOutputStream(new RandomAccessFileOutputStream(file));
+    }
+
+    /**
+     * Starts writing to the given offset. Can be beyond the current length of the file.
+     */
+    public DataOutputStream start(long offset) throws IOException {
+        file.seek(offset);
+        bufferedOutputStream.clear();
+        countingOutputStream = new CountingOutputStream(bufferedOutputStream);
+        return new DataOutputStream(countingOutputStream);
+    }
+
+    /**
+     * Returns the number of byte written since {@link #start(long)} was called.
+     */
+    public long getBytesWritten() {
+        return countingOutputStream.getCount();
+    }
+
+    /**
+     * Finishes writing, flushing and resetting any buffered state
+     */
+    public void done() throws IOException {
+        countingOutputStream.flush();
+        countingOutputStream = null;
+    }
+
+    private static class ResettableBufferedOutputStream extends BufferedOutputStream {
+        ResettableBufferedOutputStream(OutputStream output) {
+            super(output);
+        }
+
+        void clear() {
+            count = 0;
+        }
+    }
+}

test/random_access/src/main/java/seaweedfs/client/btree/CachingBlockStore.java

@@ -0,0 +1,129 @@
+/*
+ * Copyright 2009 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package seaweedfs.client.btree;
+
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+import com.google.common.collect.ImmutableSet;
+
+import javax.annotation.Nullable;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+public class CachingBlockStore implements BlockStore {
+    private final BlockStore store;
+    private final Map<BlockPointer, BlockPayload> dirty = new LinkedHashMap<BlockPointer, BlockPayload>();
+    private final Cache<BlockPointer, BlockPayload> indexBlockCache = CacheBuilder.newBuilder().maximumSize(100).concurrencyLevel(1).build();
+    private final ImmutableSet<Class<? extends BlockPayload>> cacheableBlockTypes;
+
+    public CachingBlockStore(BlockStore store, Collection<Class<? extends BlockPayload>> cacheableBlockTypes) {
+        this.store = store;
+        this.cacheableBlockTypes = ImmutableSet.copyOf(cacheableBlockTypes);
+    }
+
+    @Override
+    public void open(Runnable initAction, Factory factory) {
+        store.open(initAction, factory);
+    }
+
+    @Override
+    public void close() {
+        flush();
+        indexBlockCache.invalidateAll();
+        store.close();
+    }
+
+    @Override
+    public void clear() {
+        dirty.clear();
+        indexBlockCache.invalidateAll();
+        store.clear();
+    }
+
+    @Override
+    public void flush() {
+        Iterator<BlockPayload> iterator = dirty.values().iterator();
+        while (iterator.hasNext()) {
+            BlockPayload block = iterator.next();
+            iterator.remove();
+            store.write(block);
+        }
+        store.flush();
+    }
+
+    @Override
+    public void attach(BlockPayload block) {
+        store.attach(block);
+    }
+
+    @Override
+    public void remove(BlockPayload block) {
+        dirty.remove(block.getPos());
+        if (isCacheable(block)) {
+            indexBlockCache.invalidate(block.getPos());
+        }
+        store.remove(block);
+    }
+
+    @Override
+    public <T extends BlockPayload> T readFirst(Class<T> payloadType) {
+        T block = store.readFirst(payloadType);
+        maybeCache(block);
+        return block;
+    }
+
+    @Override
+    public <T extends BlockPayload> T read(BlockPointer pos, Class<T> payloadType) {
+        T block = payloadType.cast(dirty.get(pos));
+        if (block != null) {
+            return block;
+        }
+        block = maybeGetFromCache(pos, payloadType);
+        if (block != null) {
+            return block;
+        }
+        block = store.read(pos, payloadType);
+        maybeCache(block);
+        return block;
+    }
+
+    @Nullable
+    private <T extends BlockPayload> T maybeGetFromCache(BlockPointer pos, Class<T> payloadType) {
+        if (cacheableBlockTypes.contains(payloadType)) {
+            return payloadType.cast(indexBlockCache.getIfPresent(pos));
+        }
+        return null;
+    }
+
+    @Override
+    public void write(BlockPayload block) {
+        store.attach(block);
+        maybeCache(block);
+        dirty.put(block.getPos(), block);
+    }
+
+    private <T extends BlockPayload> void maybeCache(T block) {
+        if (isCacheable(block)) {
+            indexBlockCache.put(block.getPos(), block);
+        }
+    }
+
+    private <T extends BlockPayload> boolean isCacheable(T block) {
+        return cacheableBlockTypes.contains(block.getClass());
+    }
+}

test/random_access/src/main/java/seaweedfs/client/btree/CorruptedCacheException.java

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2009 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package seaweedfs.client.btree;
+
+class CorruptedCacheException extends RuntimeException {
+    CorruptedCacheException(String message) {
+        super(message);
+    }
+}

test/random_access/src/main/java/seaweedfs/client/btree/FileBackedBlockStore.java

@@ -0,0 +1,274 @@
+/*
+ * Copyright 2009 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package seaweedfs.client.btree;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+
+public class FileBackedBlockStore implements BlockStore {
+    private final File cacheFile;
+    private RandomAccessFile file;
+    private ByteOutput output;
+    private ByteInput input;
+    private long nextBlock;
+    private Factory factory;
+    private long currentFileSize;
+
+    public FileBackedBlockStore(File cacheFile) {
+        this.cacheFile = cacheFile;
+    }
+
+    @Override
+    public String toString() {
+        return "cache '" + cacheFile + "'";
+    }
+
+    @Override
+    public void open(Runnable runnable, Factory factory) {
+        this.factory = factory;
+        try {
+            cacheFile.getParentFile().mkdirs();
+            file = openRandomAccessFile();
+            output = new ByteOutput(file);
+            input = new ByteInput(file);
+            currentFileSize = file.length();
+            nextBlock = currentFileSize;
+            if (currentFileSize == 0) {
+                runnable.run();
+            }
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    private RandomAccessFile openRandomAccessFile() throws FileNotFoundException {
+        try {
+            return randomAccessFile("rw");
+        } catch (FileNotFoundException e) {
+            return randomAccessFile("r");
+        }
+    }
+
+    private RandomAccessFile randomAccessFile(String mode) throws FileNotFoundException {
+        return new RandomAccessFile(cacheFile, mode);
+    }
+
+    @Override
+    public void close() {
+        try {
+            file.close();
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    @Override
+    public void clear() {
+        try {
+            file.setLength(0);
+            currentFileSize = 0;
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+        nextBlock = 0;
+    }
+
+    @Override
+    public void attach(BlockPayload block) {
+        if (block.getBlock() == null) {
+            block.setBlock(new BlockImpl(block));
+        }
+    }
+
+    @Override
+    public void remove(BlockPayload block) {
+        BlockImpl blockImpl = (BlockImpl) block.getBlock();
+        blockImpl.detach();
+    }
+
+    @Override
+    public void flush() {
+    }
+
+    @Override
+    public <T extends BlockPayload> T readFirst(Class<T> payloadType) {
+        return read(BlockPointer.pos(0), payloadType);
+    }
+
+    @Override
+    public <T extends BlockPayload> T read(BlockPointer pos, Class<T> payloadType) {
+        assert !pos.isNull();
+        try {
+            T payload = payloadType.cast(factory.create(payloadType));
+            BlockImpl block = new BlockImpl(payload, pos);
+            block.read();
+            return payload;
+        } catch (CorruptedCacheException e) {
+            throw e;
+        } catch (Exception e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    @Override
+    public void write(BlockPayload block) {
+        BlockImpl blockImpl = (BlockImpl) block.getBlock();
+        try {
+            blockImpl.write();
+        } catch (CorruptedCacheException e) {
+            throw e;
+        } catch (Exception e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    private long alloc(long length) {
+        long pos = nextBlock;
+        nextBlock += length;
+        return pos;
+    }
+
+    private final class BlockImpl extends Block {
+        private static final int HEADER_SIZE = 1 + INT_SIZE; // type, payload size
+        private static final int TAIL_SIZE = INT_SIZE;
+
+        private BlockPointer pos;
+        private int payloadSize;
+
+        private BlockImpl(BlockPayload payload, BlockPointer pos) {
+            this(payload);
+            setPos(pos);
+        }
+
+        public BlockImpl(BlockPayload payload) {
+            super(payload);
+            pos = null;
+            payloadSize = -1;
+        }
+
+        @Override
+        public boolean hasPos() {
+            return pos != null;
+        }
+
+        @Override
+        public BlockPointer getPos() {
+            if (pos == null) {
+                pos = BlockPointer.pos(alloc(getSize()));
+            }
+            return pos;
+        }
+
+        @Override
+        public void setPos(BlockPointer pos) {
+            assert this.pos == null && !pos.isNull();
+            this.pos = pos;
+        }
+
+        @Override
+        public int getSize() {
+            if (payloadSize < 0) {
+                payloadSize = getPayload().getSize();
+            }
+            return payloadSize + HEADER_SIZE + TAIL_SIZE;
+        }
+
+        @Override
+        public void setSize(int size) {
+            int newPayloadSize = size - HEADER_SIZE - TAIL_SIZE;
+            assert newPayloadSize >= payloadSize;
+            payloadSize = newPayloadSize;
+        }
+
+        public void write() throws Exception {
+            long pos = getPos().getPos();
+
+            DataOutputStream outputStream = output.start(pos);
+
+            BlockPayload payload = getPayload();
+
+            // Write header
+            outputStream.writeByte(payload.getType());
+            outputStream.writeInt(payloadSize);
+            long finalSize = pos + HEADER_SIZE + TAIL_SIZE + payloadSize;
+
+            // Write body
+            payload.write(outputStream);
+
+            // Write count
+            long bytesWritten = output.getBytesWritten();
+            if (bytesWritten > Integer.MAX_VALUE) {
+                throw new IllegalArgumentException("Block payload exceeds maximum size");
+            }
+            outputStream.writeInt((int) bytesWritten);
+            output.done();
+
+            // System.out.println(String.format("wrote [%d,%d)", pos, pos + bytesWritten + 4));
+
+            // Pad
+            if (currentFileSize < finalSize) {
+                // System.out.println(String.format("pad length %d => %d", currentFileSize, finalSize));
+                file.setLength(finalSize);
+                currentFileSize = finalSize;
+            }
+        }
+
+        public void read() throws Exception {
+            long pos = getPos().getPos();
+            assert pos >= 0;
+            if (pos + HEADER_SIZE >= currentFileSize) {
+                throw blockCorruptedException();
+            }
+
+            DataInputStream inputStream = input.start(pos);
+
+            BlockPayload payload = getPayload();
+
+            // Read header
+            byte type = inputStream.readByte();
+            if (type != payload.getType()) {
+                throw blockCorruptedException();
+            }
+
+            // Read body
+            payloadSize = inputStream.readInt();
+            if (pos + HEADER_SIZE + TAIL_SIZE + payloadSize > currentFileSize) {
+                throw blockCorruptedException();
+            }
+            payload.read(inputStream);
+
+            // Read and verify count
+            long actualCount = input.getBytesRead();
+            long count = inputStream.readInt();
+            if (actualCount != count) {
+                System.out.println(String.format("read expected %d actual %d, pos %d payloadSize %d currentFileSize %d", count, actualCount, pos, payloadSize, currentFileSize));
+                throw blockCorruptedException();
+            }
+            input.done();
+        }
+
+        @Override
+        public RuntimeException blockCorruptedException() {
+            return new CorruptedCacheException(String.format("Corrupted %s found in %s.", this,
+                    FileBackedBlockStore.this));
+        }
+    }
+
+}

test/random_access/src/main/java/seaweedfs/client/btree/FreeListBlockStore.java

@@ -0,0 +1,283 @@
+/*
+ * Copyright 2009 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package seaweedfs.client.btree;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class FreeListBlockStore implements BlockStore {
+    private final BlockStore store;
+    private final BlockStore freeListStore;
+    private final int maxBlockEntries;
+    private FreeListBlock freeListBlock;
+
+    public FreeListBlockStore(BlockStore store, int maxBlockEntries) {
+        this.store = store;
+        freeListStore = this;
+        this.maxBlockEntries = maxBlockEntries;
+    }
+
+    @Override
+    public void open(final Runnable initAction, final Factory factory) {
+        Runnable freeListInitAction = new Runnable() {
+            @Override
+            public void run() {
+                freeListBlock = new FreeListBlock();
+                store.write(freeListBlock);
+                store.flush();
+                initAction.run();
+            }
+        };
+        Factory freeListFactory = new Factory() {
+            @Override
+            public Object create(Class<? extends BlockPayload> type) {
+                if (type == FreeListBlock.class) {
+                    return new FreeListBlock();
+                }
+                return factory.create(type);
+            }
+        };
+
+        store.open(freeListInitAction, freeListFactory);
+        freeListBlock = store.readFirst(FreeListBlock.class);
+    }
+
+    @Override
+    public void close() {
+        freeListBlock = null;
+        store.close();
+    }
+
+    @Override
+    public void clear() {
+        store.clear();
+    }
+
+    @Override
+    public void remove(BlockPayload block) {
+        Block container = block.getBlock();
+        store.remove(block);
+        freeListBlock.add(container.getPos(), container.getSize());
+    }
+
+    @Override
+    public <T extends BlockPayload> T readFirst(Class<T> payloadType) {
+        return store.read(freeListBlock.getNextPos(), payloadType);
+    }
+
+    @Override
+    public <T extends BlockPayload> T read(BlockPointer pos, Class<T> payloadType) {
+        return store.read(pos, payloadType);
+    }
+
+    @Override
+    public void write(BlockPayload block) {
+        attach(block);
+        store.write(block);
+    }
+
+    @Override
+    public void attach(BlockPayload block) {
+        store.attach(block);
+        freeListBlock.alloc(block.getBlock());
+    }
+
+    @Override
+    public void flush() {
+        store.flush();
+    }
+
+    private void verify() {
+        FreeListBlock block = store.readFirst(FreeListBlock.class);
+        verify(block, Integer.MAX_VALUE);
+    }
+
+    private void verify(FreeListBlock block, int maxValue) {
+        if (block.largestInNextBlock > maxValue) {
+            throw new RuntimeException("corrupt free list");
+        }
+        int current = 0;
+        for (FreeListEntry entry : block.entries) {
+            if (entry.size > maxValue) {
+                throw new RuntimeException("corrupt free list");
+            }
+            if (entry.size < block.largestInNextBlock) {
+                throw new RuntimeException("corrupt free list");
+            }
+            if (entry.size < current) {
+                throw new RuntimeException("corrupt free list");
+            }
+            current = entry.size;
+        }
+        if (!block.nextBlock.isNull()) {
+            verify(store.read(block.nextBlock, FreeListBlock.class), block.largestInNextBlock);
+        }
+    }
+
+    public class FreeListBlock extends BlockPayload {
+        private List<FreeListEntry> entries = new ArrayList<FreeListEntry>();
+        private int largestInNextBlock;
+        private BlockPointer nextBlock = BlockPointer.start();
+        // Transient fields
+        private FreeListBlock prev;
+        private FreeListBlock next;
+
+        @Override
+        protected int getSize() {
+            return Block.LONG_SIZE + Block.INT_SIZE + Block.INT_SIZE + maxBlockEntries * (Block.LONG_SIZE
+                    + Block.INT_SIZE);
+        }
+
+        @Override
+        protected byte getType() {
+            return 0x44;
+        }
+
+        @Override
+        protected void read(DataInputStream inputStream) throws Exception {
+            nextBlock = BlockPointer.pos(inputStream.readLong());
+            largestInNextBlock = inputStream.readInt();
+            int count = inputStream.readInt();
+            for (int i = 0; i < count; i++) {
+                BlockPointer pos = BlockPointer.pos(inputStream.readLong());
+                int size = inputStream.readInt();
+                entries.add(new FreeListEntry(pos, size));
+            }
+        }
+
+        @Override
+        protected void write(DataOutputStream outputStream) throws Exception {
+            outputStream.writeLong(nextBlock.getPos());
+            outputStream.writeInt(largestInNextBlock);
+            outputStream.writeInt(entries.size());
+            for (FreeListEntry entry : entries) {
+                outputStream.writeLong(entry.pos.getPos());
+                outputStream.writeInt(entry.size);
+            }
+        }
+
+        public void add(BlockPointer pos, int size) {
+            assert !pos.isNull() && size >= 0;
+            if (size == 0) {
+                return;
+            }
+
+            if (size < largestInNextBlock) {
+                FreeListBlock next = getNextBlock();
+                next.add(pos, size);
+                return;
+            }
+
+            FreeListEntry entry = new FreeListEntry(pos, size);
+            int index = Collections.binarySearch(entries, entry);
+            if (index < 0) {
+                index = -index - 1;
+            }
+            entries.add(index, entry);
+
+            if (entries.size() > maxBlockEntries) {
+                FreeListBlock newBlock = new FreeListBlock();
+                newBlock.largestInNextBlock = largestInNextBlock;
+                newBlock.nextBlock = nextBlock;
+                newBlock.prev = this;
+                newBlock.next = next;
+                next = newBlock;
+
+                List<FreeListEntry> newBlockEntries = entries.subList(0, entries.size() / 2);
+                newBlock.entries.addAll(newBlockEntries);
+                newBlockEntries.clear();
+                largestInNextBlock = newBlock.entries.get(newBlock.entries.size() - 1).size;
+                freeListStore.write(newBlock);
+                nextBlock = newBlock.getPos();
+            }
+
+            freeListStore.write(this);
+        }
+
+        private FreeListBlock getNextBlock() {
+            if (next == null) {
+                next = freeListStore.read(nextBlock, FreeListBlock.class);
+                next.prev = this;
+            }
+            return next;
+        }
+
+        public void alloc(Block block) {
+            if (block.hasPos()) {
+                return;
+            }
+
+            int requiredSize = block.getSize();
+
+            if (entries.isEmpty() || requiredSize <= largestInNextBlock) {
+                if (nextBlock.isNull()) {
+                    return;
+                }
+                getNextBlock().alloc(block);
+                return;
+            }
+
+            int index = Collections.binarySearch(entries, new FreeListEntry(null, requiredSize));
+            if (index < 0) {
+                index = -index - 1;
+            }
+            if (index == entries.size()) {
+                // Largest free block is too small
+                return;
+            }
+
+            FreeListEntry entry = entries.remove(index);
+            block.setPos(entry.pos);
+            block.setSize(entry.size);
+            freeListStore.write(this);
+
+            if (entries.size() == 0 && prev != null) {
+                prev.nextBlock = nextBlock;
+                prev.largestInNextBlock = largestInNextBlock;
+                prev.next = next;
+                if (next != null) {
+                    next.prev = prev;
+                }
+                freeListStore.write(prev);
+                freeListStore.remove(this);
+            }
+        }
+    }
+
+    private static class FreeListEntry implements Comparable<FreeListEntry> {
+        final BlockPointer pos;
+        final int size;
+
+        private FreeListEntry(BlockPointer pos, int size) {
+            this.pos = pos;
+            this.size = size;
+        }
+
+        @Override
+        public int compareTo(FreeListEntry o) {
+            if (size > o.size) {
+                return 1;
+            }
+            if (size < o.size) {
+                return -1;
+            }
+            return 0;
+        }
+    }
+}

test/random_access/src/main/java/seaweedfs/client/btree/KeyHasher.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright 2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package seaweedfs.client.btree;
+
+import seaweedfs.client.btree.serialize.Serializer;
+import seaweedfs.client.btree.serialize.kryo.KryoBackedEncoder;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.math.BigInteger;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+class KeyHasher<K> {
+    private final Serializer<K> serializer;
+    private final MessageDigestStream digestStream = new MessageDigestStream();
+    private final KryoBackedEncoder encoder = new KryoBackedEncoder(digestStream);
+
+    public KeyHasher(Serializer<K> serializer) {
+        this.serializer = serializer;
+    }
+
+    long getHashCode(K key) throws Exception {
+        serializer.write(encoder, key);
+        encoder.flush();
+        return digestStream.getChecksum();
+    }
+
+    private static class MessageDigestStream extends OutputStream {
+        MessageDigest messageDigest;
+
+        private MessageDigestStream() {
+            try {
+                messageDigest = MessageDigest.getInstance("MD5");
+            } catch (NoSuchAlgorithmException e) {
+                throw UncheckedException.throwAsUncheckedException(e);
+            }
+        }
+
+        @Override
+        public void write(int b) throws IOException {
+            messageDigest.update((byte) b);
+        }
+
+        @Override
+        public void write(byte[] b) throws IOException {
+            messageDigest.update(b);
+        }
+
+        @Override
+        public void write(byte[] b, int off, int len) throws IOException {
+            messageDigest.update(b, off, len);
+        }
+
+        long getChecksum() {
+            byte[] digest = messageDigest.digest();
+            assert digest.length == 16;
+            return new BigInteger(digest).longValue();
+        }
+    }
+}

test/random_access/src/main/java/seaweedfs/client/btree/RandomAccessFileInputStream.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package seaweedfs.client.btree;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.RandomAccessFile;
+
+/**
+ * Reads from a {@link RandomAccessFile}. Each operation reads from and advances the current position of the file.
+ *
+ * <p>Closing this stream does not close the underlying file.
+ */
+public class RandomAccessFileInputStream extends InputStream {
+    private final RandomAccessFile file;
+
+    public RandomAccessFileInputStream(RandomAccessFile file) {
+        this.file = file;
+    }
+
+    @Override
+    public long skip(long n) throws IOException {
+        file.seek(file.getFilePointer() + n);
+        return n;
+    }
+
+    @Override
+    public int read(byte[] bytes) throws IOException {
+        return file.read(bytes);
+    }
+
+    @Override
+    public int read() throws IOException {
+        return file.read();
+    }
+
+    @Override
+    public int read(byte[] bytes, int offset, int length) throws IOException {
+        return file.read(bytes, offset, length);
+    }
+}

test/random_access/src/main/java/seaweedfs/client/btree/RandomAccessFileOutputStream.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package seaweedfs.client.btree;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.RandomAccessFile;
+
+/**
+ * Writes to a {@link RandomAccessFile}. Each operation writes to and advances the current position of the file.
+ *
+ * <p>Closing this stream does not close the underlying file. Flushing this stream does nothing.
+ */
+public class RandomAccessFileOutputStream extends OutputStream {
+    private final RandomAccessFile file;
+
+    public RandomAccessFileOutputStream(RandomAccessFile file) {
+        this.file = file;
+    }
+
+    @Override
+    public void write(int i) throws IOException {
+        file.write(i);
+    }
+
+    @Override
+    public void write(byte[] bytes) throws IOException {
+        file.write(bytes);
+    }
+
+    @Override
+    public void write(byte[] bytes, int offset, int length) throws IOException {
+        file.write(bytes, offset, length);
+    }
+}

test/random_access/src/main/java/seaweedfs/client/btree/StateCheckBlockStore.java

@@ -0,0 +1,87 @@
+/*
+ * Copyright 2009 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package seaweedfs.client.btree;
+
+public class StateCheckBlockStore implements BlockStore {
+    private final BlockStore blockStore;
+    private boolean open;
+
+    public StateCheckBlockStore(BlockStore blockStore) {
+        this.blockStore = blockStore;
+    }
+
+    @Override
+    public void open(Runnable initAction, Factory factory) {
+        assert !open;
+        open = true;
+        blockStore.open(initAction, factory);
+    }
+
+    public boolean isOpen() {
+        return open;
+    }
+
+    @Override
+    public void close() {
+        if (!open) {
+            return;
+        }
+        open = false;
+        blockStore.close();
+    }
+
+    @Override
+    public void clear() {
+        assert open;
+        blockStore.clear();
+    }
+
+    @Override
+    public void remove(BlockPayload block) {
+        assert open;
+        blockStore.remove(block);
+    }
+
+    @Override
+    public <T extends BlockPayload> T readFirst(Class<T> payloadType) {
+        assert open;
+        return blockStore.readFirst(payloadType);
+    }
+
+    @Override
+    public <T extends BlockPayload> T read(BlockPointer pos, Class<T> payloadType) {
+        assert open;
+        return blockStore.read(pos, payloadType);
+    }
+
+    @Override
+    public void write(BlockPayload block) {
+        assert open;
+        blockStore.write(block);
+    }
+
+    @Override
+    public void attach(BlockPayload block) {
+        assert open;
+        blockStore.attach(block);
+    }
+
+    @Override
+    public void flush() {
+        assert open;
+        blockStore.flush();
+    }
+}

test/random_access/src/main/java/seaweedfs/client/btree/StreamByteBuffer.java

@@ -0,0 +1,526 @@
+/*
+ * Copyright 2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package seaweedfs.client.btree;
+
+import java.io.EOFException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.charset.CharacterCodingException;
+import java.nio.charset.Charset;
+import java.nio.charset.CharsetDecoder;
+import java.nio.charset.CoderResult;
+import java.nio.charset.CodingErrorAction;
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+
+
+/**
+ * An in-memory buffer that provides OutputStream and InputStream interfaces.
+ *
+ * This is more efficient than using ByteArrayOutputStream/ByteArrayInputStream
+ *
+ * Reading the buffer will clear the buffer.
+ * This is not thread-safe, it is intended to be used by a single Thread.
+ */
+public class StreamByteBuffer {
+    private static final int DEFAULT_CHUNK_SIZE = 4096;
+    private static final int MAX_CHUNK_SIZE = 1024 * 1024;
+    private LinkedList<StreamByteBufferChunk> chunks = new LinkedList<StreamByteBufferChunk>();
+    private StreamByteBufferChunk currentWriteChunk;
+    private StreamByteBufferChunk currentReadChunk;
+    private int chunkSize;
+    private int nextChunkSize;
+    private int maxChunkSize;
+    private StreamByteBufferOutputStream output;
+    private StreamByteBufferInputStream input;
+    private int totalBytesUnreadInList;
+
+    public StreamByteBuffer() {
+        this(DEFAULT_CHUNK_SIZE);
+    }
+
+    public StreamByteBuffer(int chunkSize) {
+        this.chunkSize = chunkSize;
+        this.nextChunkSize = chunkSize;
+        this.maxChunkSize = Math.max(chunkSize, MAX_CHUNK_SIZE);
+        currentWriteChunk = new StreamByteBufferChunk(nextChunkSize);
+        output = new StreamByteBufferOutputStream();
+        input = new StreamByteBufferInputStream();
+    }
+
+    public static StreamByteBuffer of(InputStream inputStream) throws IOException {
+        StreamByteBuffer buffer = new StreamByteBuffer(chunkSizeInDefaultRange(inputStream.available()));
+        buffer.readFully(inputStream);
+        return buffer;
+    }
+
+    public static StreamByteBuffer of(InputStream inputStream, int len) throws IOException {
+        StreamByteBuffer buffer = new StreamByteBuffer(chunkSizeInDefaultRange(len));
+        buffer.readFrom(inputStream, len);
+        return buffer;
+    }
+
+    public static StreamByteBuffer createWithChunkSizeInDefaultRange(int value) {
+        return new StreamByteBuffer(chunkSizeInDefaultRange(value));
+    }
+
+    static int chunkSizeInDefaultRange(int value) {
+        return valueInRange(value, DEFAULT_CHUNK_SIZE, MAX_CHUNK_SIZE);
+    }
+
+    private static int valueInRange(int value, int min, int max) {
+        return Math.min(Math.max(value, min), max);
+    }
+
+    public OutputStream getOutputStream() {
+        return output;
+    }
+
+    public InputStream getInputStream() {
+        return input;
+    }
+
+    public void writeTo(OutputStream target) throws IOException {
+        while (prepareRead() != -1) {
+            currentReadChunk.writeTo(target);
+        }
+    }
+
+    public void readFrom(InputStream inputStream, int len) throws IOException {
+        int bytesLeft = len;
+        while (bytesLeft > 0) {
+            int spaceLeft = allocateSpace();
+            int limit = Math.min(spaceLeft, bytesLeft);
+            int readBytes = currentWriteChunk.readFrom(inputStream, limit);
+            if (readBytes == -1) {
+                throw new EOFException("Unexpected EOF");
+            }
+            bytesLeft -= readBytes;
+        }
+    }
+
+    public void readFully(InputStream inputStream) throws IOException {
+        while (true) {
+            int len = allocateSpace();
+            int readBytes = currentWriteChunk.readFrom(inputStream, len);
+            if (readBytes == -1) {
+                break;
+            }
+        }
+    }
+
+    public byte[] readAsByteArray() {
+        byte[] buf = new byte[totalBytesUnread()];
+        input.readImpl(buf, 0, buf.length);
+        return buf;
+    }
+
+    public List<byte[]> readAsListOfByteArrays() {
+        List<byte[]> listOfByteArrays = new ArrayList<byte[]>(chunks.size() + 1);
+        byte[] buf;
+        while ((buf = input.readNextBuffer()) != null) {
+            if (buf.length > 0) {
+                listOfByteArrays.add(buf);
+            }
+        }
+        return listOfByteArrays;
+    }
+
+    public String readAsString(String encoding) {
+        Charset charset = Charset.forName(encoding);
+        return readAsString(charset);
+    }
+
+    public String readAsString() {
+        return readAsString(Charset.defaultCharset());
+    }
+
+    public String readAsString(Charset charset) {
+        try {
+            return doReadAsString(charset);
+        } catch (CharacterCodingException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    private String doReadAsString(Charset charset) throws CharacterCodingException {
+        int unreadSize = totalBytesUnread();
+        if (unreadSize > 0) {
+            return readAsCharBuffer(charset).toString();
+        }
+        return "";
+    }
+
+    private CharBuffer readAsCharBuffer(Charset charset) throws CharacterCodingException {
+        CharsetDecoder decoder = charset.newDecoder().onMalformedInput(
+                CodingErrorAction.REPLACE).onUnmappableCharacter(
+                CodingErrorAction.REPLACE);
+        CharBuffer charbuffer = CharBuffer.allocate(totalBytesUnread());
+        ByteBuffer buf = null;
+        boolean wasUnderflow = false;
+        ByteBuffer nextBuf = null;
+        boolean needsFlush = false;
+        while (hasRemaining(nextBuf) || hasRemaining(buf) || prepareRead() != -1) {
+            if (hasRemaining(buf)) {
+                // handle decoding underflow, multi-byte unicode character at buffer chunk boundary
+                if (!wasUnderflow) {
+                    throw new IllegalStateException("Unexpected state. Buffer has remaining bytes without underflow in decoding.");
+                }
+                if (!hasRemaining(nextBuf) && prepareRead() != -1) {
+                    nextBuf = currentReadChunk.readToNioBuffer();
+                }
+                // copy one by one until the underflow has been resolved
+                buf = ByteBuffer.allocate(buf.remaining() + 1).put(buf);
+                buf.put(nextBuf.get());
+                BufferCaster.cast(buf).flip();
+            } else {
+                if (hasRemaining(nextBuf)) {
+                    buf = nextBuf;
+                } else if (prepareRead() != -1) {
+                    buf = currentReadChunk.readToNioBuffer();
+                    if (!hasRemaining(buf)) {
+                        throw new IllegalStateException("Unexpected state. Buffer is empty.");
+                    }
+                }
+                nextBuf = null;
+            }
+            boolean endOfInput = !hasRemaining(nextBuf) && prepareRead() == -1;
+            int bufRemainingBefore = buf.remaining();
+            CoderResult result = decoder.decode(buf, charbuffer, false);
+            if (bufRemainingBefore > buf.remaining()) {
+                needsFlush = true;
+            }
+            if (endOfInput) {
+                result = decoder.decode(ByteBuffer.allocate(0), charbuffer, true);
+                if (!result.isUnderflow()) {
+                    result.throwException();
+                }
+                break;
+            }
+            wasUnderflow = result.isUnderflow();
+        }
+        if (needsFlush) {
+            CoderResult result = decoder.flush(charbuffer);
+            if (!result.isUnderflow()) {
+                result.throwException();
+            }
+        }
+        clear();
+        // push back remaining bytes of multi-byte unicode character
+        while (hasRemaining(buf)) {
+            byte b = buf.get();
+            try {
+                getOutputStream().write(b);
+            } catch (IOException e) {
+                throw new UncheckedIOException(e);
+            }
+        }
+        BufferCaster.cast(charbuffer).flip();
+        return charbuffer;
+    }
+
+    private boolean hasRemaining(ByteBuffer nextBuf) {
+        return nextBuf != null && nextBuf.hasRemaining();
+    }
+
+    public int totalBytesUnread() {
+        int total = totalBytesUnreadInList;
+        if (currentReadChunk != null) {
+            total += currentReadChunk.bytesUnread();
+        }
+        if (currentWriteChunk != currentReadChunk && currentWriteChunk != null) {
+            total += currentWriteChunk.bytesUnread();
+        }
+        return total;
+    }
+
+    protected int allocateSpace() {
+        int spaceLeft = currentWriteChunk.spaceLeft();
+        if (spaceLeft == 0) {
+            addChunk(currentWriteChunk);
+            currentWriteChunk = new StreamByteBufferChunk(nextChunkSize);
+            if (nextChunkSize < maxChunkSize) {
+                nextChunkSize = Math.min(nextChunkSize * 2, maxChunkSize);
+            }
+            spaceLeft = currentWriteChunk.spaceLeft();
+        }
+        return spaceLeft;
+    }
+
+    protected int prepareRead() {
+        int bytesUnread = (currentReadChunk != null) ? currentReadChunk.bytesUnread() : 0;
+        if (bytesUnread == 0) {
+            if (!chunks.isEmpty()) {
+                currentReadChunk = chunks.removeFirst();
+                bytesUnread = currentReadChunk.bytesUnread();
+                totalBytesUnreadInList -= bytesUnread;
+            } else if (currentReadChunk != currentWriteChunk) {
+                currentReadChunk = currentWriteChunk;
+                bytesUnread = currentReadChunk.bytesUnread();
+            } else {
+                bytesUnread = -1;
+            }
+        }
+        return bytesUnread;
+    }
+
+    public static StreamByteBuffer of(List<byte[]> listOfByteArrays) {
+        StreamByteBuffer buffer = new StreamByteBuffer();
+        buffer.addChunks(listOfByteArrays);
+        return buffer;
+    }
+
+    private void addChunks(List<byte[]> listOfByteArrays) {
+        for (byte[] buf : listOfByteArrays) {
+            addChunk(new StreamByteBufferChunk(buf));
+        }
+    }
+
+    private void addChunk(StreamByteBufferChunk chunk) {
+        chunks.add(chunk);
+        totalBytesUnreadInList += chunk.bytesUnread();
+    }
+
+    static class StreamByteBufferChunk {
+        private int pointer;
+        private byte[] buffer;
+        private int size;
+        private int used;
+
+        public StreamByteBufferChunk(int size) {
+            this.size = size;
+            buffer = new byte[size];
+        }
+
+        public StreamByteBufferChunk(byte[] buf) {
+            this.size = buf.length;
+            this.buffer = buf;
+            this.used = buf.length;
+        }
+
+        public ByteBuffer readToNioBuffer() {
+            if (pointer < used) {
+                ByteBuffer result;
+                if (pointer > 0 || used < size) {
+                    result = ByteBuffer.wrap(buffer, pointer, used - pointer);
+                } else {
+                    result = ByteBuffer.wrap(buffer);
+                }
+                pointer = used;
+                return result;
+            }
+
+            return null;
+        }
+
+        public boolean write(byte b) {
+            if (used < size) {
+                buffer[used++] = b;
+                return true;
+            }
+
+            return false;
+        }
+
+        public void write(byte[] b, int off, int len) {
+            System.arraycopy(b, off, buffer, used, len);
+            used = used + len;
+        }
+
+        public void read(byte[] b, int off, int len) {
+            System.arraycopy(buffer, pointer, b, off, len);
+            pointer = pointer + len;
+        }
+
+        public void writeTo(OutputStream target) throws IOException {
+            if (pointer < used) {
+                target.write(buffer, pointer, used - pointer);
+                pointer = used;
+            }
+        }
+
+        public void reset() {
+            pointer = 0;
+        }
+
+        public int bytesUsed() {
+            return used;
+        }
+
+        public int bytesUnread() {
+            return used - pointer;
+        }
+
+        public int read() {
+            if (pointer < used) {
+                return buffer[pointer++] & 0xff;
+            }
+
+            return -1;
+        }
+
+        public int spaceLeft() {
+            return size - used;
+        }
+
+        public int readFrom(InputStream inputStream, int len) throws IOException {
+            int readBytes = inputStream.read(buffer, used, len);
+            if(readBytes > 0) {
+                used += readBytes;
+            }
+            return readBytes;
+        }
+
+        public void clear() {
+            used = pointer = 0;
+        }
+
+        public byte[] readBuffer() {
+            if (used == buffer.length && pointer == 0) {
+                pointer = used;
+                return buffer;
+            } else if (pointer < used) {
+                byte[] buf = new byte[used - pointer];
+                read(buf, 0, used - pointer);
+                return buf;
+            } else {
+                return new byte[0];
+            }
+        }
+    }
+
+    class StreamByteBufferOutputStream extends OutputStream {
+        private boolean closed;
+
+        @Override
+        public void write(byte[] b, int off, int len) throws IOException {
+            if (b == null) {
+                throw new NullPointerException();
+            }
+
+            if ((off < 0) || (off > b.length) || (len < 0)
+                    || ((off + len) > b.length) || ((off + len) < 0)) {
+                throw new IndexOutOfBoundsException();
+            }
+
+            if (len == 0) {
+                return;
+            }
+
+            int bytesLeft = len;
+            int currentOffset = off;
+            while (bytesLeft > 0) {
+                int spaceLeft = allocateSpace();
+                int writeBytes = Math.min(spaceLeft, bytesLeft);
+                currentWriteChunk.write(b, currentOffset, writeBytes);
+                bytesLeft -= writeBytes;
+                currentOffset += writeBytes;
+            }
+        }
+
+        @Override
+        public void close() throws IOException {
+            closed = true;
+        }
+
+        public boolean isClosed() {
+            return closed;
+        }
+
+        @Override
+        public void write(int b) throws IOException {
+            allocateSpace();
+            currentWriteChunk.write((byte) b);
+        }
+
+        public StreamByteBuffer getBuffer() {
+            return StreamByteBuffer.this;
+        }
+    }
+
+    class StreamByteBufferInputStream extends InputStream {
+        @Override
+        public int read() throws IOException {
+            prepareRead();
+            return currentReadChunk.read();
+        }
+
+        @Override
+        public int read(byte[] b, int off, int len) throws IOException {
+            return readImpl(b, off, len);
+        }
+
+        int readImpl(byte[] b, int off, int len) {
+            if (b == null) {
+                throw new NullPointerException();
+            }
+
+            if ((off < 0) || (off > b.length) || (len < 0)
+                    || ((off + len) > b.length) || ((off + len) < 0)) {
+                throw new IndexOutOfBoundsException();
+            }
+
+            if (len == 0) {
+                return 0;
+            }
+
+            int bytesLeft = len;
+            int currentOffset = off;
+            int bytesUnread = prepareRead();
+            int totalBytesRead = 0;
+            while (bytesLeft > 0 && bytesUnread != -1) {
+                int readBytes = Math.min(bytesUnread, bytesLeft);
+                currentReadChunk.read(b, currentOffset, readBytes);
+                bytesLeft -= readBytes;
+                currentOffset += readBytes;
+                totalBytesRead += readBytes;
+                bytesUnread = prepareRead();
+            }
+            if (totalBytesRead > 0) {
+                return totalBytesRead;
+            }
+
+            return -1;
+        }
+
+        @Override
+        public int available() throws IOException {
+            return totalBytesUnread();
+        }
+
+        public StreamByteBuffer getBuffer() {
+            return StreamByteBuffer.this;
+        }
+
+        public byte[] readNextBuffer() {
+            if (prepareRead() != -1) {
+                return currentReadChunk.readBuffer();
+            }
+            return null;
+        }
+    }
+
+    public void clear() {
+        chunks.clear();
+        currentReadChunk = null;
+        totalBytesUnreadInList = 0;
+        currentWriteChunk.clear();
+    }
+}