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77d3e30239
Improves scans with clustering restrictions. Before the change such scans would scan whole partition. Below are results of a test case from perf_fast_forward which selects few rows from a large partition using query restrictions (not fast forwarding). Before: stride rows time [s] frags frag/s aio [KiB] blocked dropped idx hit idx miss idx blk cpu 1000000 1 0.000609 1 1642 3 152 2 1 0 1 1 38.0% 500000 2 0.242255 2 8 511 64152 398 4 0 1 1 98.6% 250000 4 0.281592 4 14 749 95832 564 4 0 1 1 98.4% 125000 8 0.328056 8 24 873 111704 657 4 0 1 1 98.4% 62500 16 0.306700 16 52 935 119640 751 4 0 1 1 99.4% After: stride rows time [s] frags frag/s aio [KiB] blocked dropped idx hit idx miss idx blk cpu 1000000 1 0.000711 1 1406 3 152 2 1 0 1 1 42.1% 500000 2 0.000910 2 2197 5 216 3 2 0 1 1 39.2% 250000 4 0.001384 4 2891 9 344 5 4 0 1 1 35.3% 125000 8 0.003197 8 2502 21 728 13 8 0 1 1 53.1% 62500 16 0.006664 16 2401 41 1368 25 16 0 1 1 58.2%
Scylla
Building Scylla
In addition to required packages by Seastar, the following packages are required by Scylla.
Submodules
Scylla uses submodules, so make sure you pull the submodules first by doing:
git submodule init
git submodule update --init --recursive
Building and Running Scylla on Fedora
- Installing required packages:
sudo dnf install yaml-cpp-devel lz4-devel zlib-devel snappy-devel jsoncpp-devel thrift-devel antlr3-tool antlr3-C++-devel libasan libubsan gcc-c++ gnutls-devel ninja-build ragel libaio-devel cryptopp-devel xfsprogs-devel numactl-devel hwloc-devel libpciaccess-devel libxml2-devel python3-pyparsing lksctp-tools-devel protobuf-devel protobuf-compiler systemd-devel libunwind-devel
- Build Scylla
./configure.py --mode=release --with=scylla --disable-xen
ninja-build build/release/scylla -j2 # you can use more cpus if you have tons of RAM
- Run Scylla
./build/release/scylla
- run Scylla with one CPU and ./tmp as data directory
./build/release/scylla --datadir tmp --commitlog-directory tmp --smp 1
- For more run options:
./build/release/scylla --help
Building Fedora RPM
As a pre-requisite, you need to install Mock on your machine:
# Install mock:
sudo yum install mock
# Add user to the "mock" group:
usermod -a -G mock $USER && newgrp mock
Then, to build an RPM, run:
./dist/redhat/build_rpm.sh
The built RPM is stored in /var/lib/mock/<configuration>/result directory.
For example, on Fedora 21 mock reports the following:
INFO: Done(scylla-server-0.00-1.fc21.src.rpm) Config(default) 20 minutes 7 seconds
INFO: Results and/or logs in: /var/lib/mock/fedora-21-x86_64/result
Building Fedora-based Docker image
Build a Docker image with:
cd dist/docker
docker build -t <image-name> .
Run the image with:
docker run -p $(hostname -i):9042:9042 -i -t <image name>