3.41

skipping manifest chunk volume id change
add fs.meta.changeVolumeId
2026-10-01 20:26:27 +00:00 · 2023-01-29 22:56:01 -08:00 · 2023-01-29 22:55:06 -08:00 · 2023-01-29 22:51:58 -08:00 · 2023-01-29 07:55:27 -08:00 · 2023-01-28 06:55:27 -08:00
207 changed files with 5372 additions and 2402 deletions
@@ -38,13 +38,13 @@ jobs:
    steps:

      - name: Check out code into the Go module directory
-        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v2
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v2

      - name: Set BUILD_TIME env
        run: echo BUILD_TIME=$(date -u +%Y%m%d-%H%M) >> ${GITHUB_ENV}

      - name: Go Release Binaries Large Disk
-        uses: wangyoucao577/go-release-action@156f172aa3d27f3879a47cad8810b366c299e9e9 # v1.22
+        uses: wangyoucao577/go-release-action@074de155de851f31c28201ff48135d4ecea0fb6c # v1.22
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          goos: ${{ matrix.goos }}
@@ -60,7 +60,7 @@ jobs:
          asset_name: "weed-large-disk-${{ env.BUILD_TIME }}-${{ matrix.goos }}-${{ matrix.goarch }}"

      - name: Go Release Binaries Normal Volume Size
-        uses: wangyoucao577/go-release-action@156f172aa3d27f3879a47cad8810b366c299e9e9 # v1.22
+        uses: wangyoucao577/go-release-action@074de155de851f31c28201ff48135d4ecea0fb6c # v1.22
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          goos: ${{ matrix.goos }}
@@ -87,13 +87,13 @@ jobs:
    steps:

      - name: Check out code into the Go module directory
-        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v2
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v2

      - name: Set BUILD_TIME env
        run: echo BUILD_TIME=$(date -u +%Y%m%d-%H%M) >> ${GITHUB_ENV}

      - name: Go Release Binaries Large Disk
-        uses: wangyoucao577/go-release-action@156f172aa3d27f3879a47cad8810b366c299e9e9 # v1.22
+        uses: wangyoucao577/go-release-action@074de155de851f31c28201ff48135d4ecea0fb6c # v1.22
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          goos: ${{ matrix.goos }}
@@ -109,7 +109,7 @@ jobs:
          asset_name: "weed-large-disk-${{ env.BUILD_TIME }}-${{ matrix.goos }}-${{ matrix.goarch }}"

      - name: Go Release Binaries Normal Volume Size
-        uses: wangyoucao577/go-release-action@156f172aa3d27f3879a47cad8810b366c299e9e9 # v1.22
+        uses: wangyoucao577/go-release-action@074de155de851f31c28201ff48135d4ecea0fb6c # v1.22
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          goos: ${{ matrix.goos }}
@@ -28,9 +28,9 @@ jobs:
    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v2
+      - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v2
      - name: Go Release Binaries Normal Volume Size
-        uses: wangyoucao577/go-release-action@156f172aa3d27f3879a47cad8810b366c299e9e9 # v1.22
+        uses: wangyoucao577/go-release-action@074de155de851f31c28201ff48135d4ecea0fb6c # v1.22
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          goos: ${{ matrix.goos }}
@@ -44,7 +44,7 @@ jobs:
          binary_name: weed
          asset_name: "${{ matrix.goos }}_${{ matrix.goarch }}"
      - name: Go Release Large Disk Binaries
-        uses: wangyoucao577/go-release-action@156f172aa3d27f3879a47cad8810b366c299e9e9 # v1.22
+        uses: wangyoucao577/go-release-action@074de155de851f31c28201ff48135d4ecea0fb6c # v1.22
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          goos: ${{ matrix.goos }}
@@ -28,9 +28,9 @@ jobs:
    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v2
+      - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v2
      - name: Go Release Binaries Normal Volume Size
-        uses: wangyoucao577/go-release-action@156f172aa3d27f3879a47cad8810b366c299e9e9 # v1.22
+        uses: wangyoucao577/go-release-action@074de155de851f31c28201ff48135d4ecea0fb6c # v1.22
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          goos: ${{ matrix.goos }}
@@ -44,7 +44,7 @@ jobs:
          binary_name: weed
          asset_name: "${{ matrix.goos }}_${{ matrix.goarch }}"
      - name: Go Release Large Disk Binaries
-        uses: wangyoucao577/go-release-action@156f172aa3d27f3879a47cad8810b366c299e9e9 # v1.22
+        uses: wangyoucao577/go-release-action@074de155de851f31c28201ff48135d4ecea0fb6c # v1.22
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          goos: ${{ matrix.goos }}
@@ -28,9 +28,9 @@ jobs:
    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v2
+      - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v2
      - name: Go Release Binaries Normal Volume Size
-        uses: wangyoucao577/go-release-action@156f172aa3d27f3879a47cad8810b366c299e9e9 # v1.22
+        uses: wangyoucao577/go-release-action@074de155de851f31c28201ff48135d4ecea0fb6c # v1.22
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          goos: ${{ matrix.goos }}
@@ -44,7 +44,7 @@ jobs:
          binary_name: weed
          asset_name: "${{ matrix.goos }}_${{ matrix.goarch }}"
      - name: Go Release Large Disk Binaries
-        uses: wangyoucao577/go-release-action@156f172aa3d27f3879a47cad8810b366c299e9e9 # v1.22
+        uses: wangyoucao577/go-release-action@074de155de851f31c28201ff48135d4ecea0fb6c # v1.22
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          goos: ${{ matrix.goos }}
@@ -28,9 +28,9 @@ jobs:
    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v2
+      - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v2
      - name: Go Release Binaries Normal Volume Size
-        uses: wangyoucao577/go-release-action@156f172aa3d27f3879a47cad8810b366c299e9e9 # v1.22
+        uses: wangyoucao577/go-release-action@074de155de851f31c28201ff48135d4ecea0fb6c # v1.22
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          goos: ${{ matrix.goos }}
@@ -44,7 +44,7 @@ jobs:
          binary_name: weed
          asset_name: "${{ matrix.goos }}_${{ matrix.goarch }}"
      - name: Go Release Large Disk Binaries
-        uses: wangyoucao577/go-release-action@156f172aa3d27f3879a47cad8810b366c299e9e9 # v1.22
+        uses: wangyoucao577/go-release-action@074de155de851f31c28201ff48135d4ecea0fb6c # v1.22
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          goos: ${{ matrix.goos }}
@@ -28,9 +28,9 @@ jobs:
    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v2
+      - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v2
      - name: Go Release Binaries Normal Volume Size
-        uses: wangyoucao577/go-release-action@156f172aa3d27f3879a47cad8810b366c299e9e9 # v1.22
+        uses: wangyoucao577/go-release-action@074de155de851f31c28201ff48135d4ecea0fb6c # v1.22
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          goos: ${{ matrix.goos }}
@@ -45,7 +45,7 @@ jobs:
          binary_name: weed
          asset_name: "${{ matrix.goos }}_${{ matrix.goarch }}_full"
      - name: Go Release Large Disk Binaries
-        uses: wangyoucao577/go-release-action@156f172aa3d27f3879a47cad8810b366c299e9e9 # v1.22
+        uses: wangyoucao577/go-release-action@074de155de851f31c28201ff48135d4ecea0fb6c # v1.22
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          goos: ${{ matrix.goos }}
@@ -18,7 +18,7 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c

      # Initializes the CodeQL tools for scanning.
      - name: Initialize CodeQL
@@ -16,11 +16,11 @@ jobs:
    steps:
      -
        name: Checkout
-        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v2
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v2
      -
        name: Docker meta
        id: docker_meta
-        uses: docker/metadata-action@57396166ad8aefe6098280995947635806a0e6ea # v3
+        uses: docker/metadata-action@507c2f2dc502c992ad446e3d7a5dfbe311567a96 # v3
        with:
          images: |
            chrislusf/seaweedfs
@@ -56,7 +56,7 @@ jobs:
          password: ${{ secrets.GHCR_TOKEN }}
      -
        name: Build
-        uses: docker/build-push-action@c56af957549030174b10d6867f20e78cfd7debc5 # v2
+        uses: docker/build-push-action@37abcedcc1da61a57767b7588cb9d03eb57e28b3 # v2
        with:
          context: ./docker
          push: ${{ github.event_name != 'pull_request' }}
@@ -17,11 +17,11 @@ jobs:
    steps:
      -
        name: Checkout
-        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v2
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v2
      -
        name: Docker meta
        id: docker_meta
-        uses: docker/metadata-action@57396166ad8aefe6098280995947635806a0e6ea # v3
+        uses: docker/metadata-action@507c2f2dc502c992ad446e3d7a5dfbe311567a96 # v3
        with:
          images: |
            chrislusf/seaweedfs
@@ -57,7 +57,7 @@ jobs:
          password: ${{ secrets.GHCR_TOKEN }}
      -
        name: Build
-        uses: docker/build-push-action@c56af957549030174b10d6867f20e78cfd7debc5 # v2
+        uses: docker/build-push-action@37abcedcc1da61a57767b7588cb9d03eb57e28b3 # v2
        with:
          context: ./docker
          push: ${{ github.event_name != 'pull_request' }}
@@ -16,11 +16,11 @@ jobs:
    steps:
      -
        name: Checkout
-        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v2
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v2
      -
        name: Docker meta
        id: docker_meta
-        uses: docker/metadata-action@57396166ad8aefe6098280995947635806a0e6ea # v3
+        uses: docker/metadata-action@507c2f2dc502c992ad446e3d7a5dfbe311567a96 # v3
        with:
          images: |
            chrislusf/seaweedfs
@@ -47,7 +47,7 @@ jobs:
          password: ${{ secrets.DOCKER_PASSWORD }}
      -
        name: Build
-        uses: docker/build-push-action@c56af957549030174b10d6867f20e78cfd7debc5 # v2
+        uses: docker/build-push-action@37abcedcc1da61a57767b7588cb9d03eb57e28b3 # v2
        with:
          context: ./docker
          push: ${{ github.event_name != 'pull_request' }}
@@ -17,11 +17,11 @@ jobs:
    steps:
      -
        name: Checkout
-        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v2
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v2
      -
        name: Docker meta
        id: docker_meta
-        uses: docker/metadata-action@57396166ad8aefe6098280995947635806a0e6ea # v3
+        uses: docker/metadata-action@507c2f2dc502c992ad446e3d7a5dfbe311567a96 # v3
        with:
          images: |
            chrislusf/seaweedfs
@@ -48,7 +48,7 @@ jobs:
          password: ${{ secrets.DOCKER_PASSWORD }}
      -
        name: Build
-        uses: docker/build-push-action@c56af957549030174b10d6867f20e78cfd7debc5 # v2
+        uses: docker/build-push-action@37abcedcc1da61a57767b7588cb9d03eb57e28b3 # v2
        with:
          context: ./docker
          push: ${{ github.event_name != 'pull_request' }}
@@ -17,11 +17,11 @@ jobs:
    steps:
      -
        name: Checkout
-        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v2
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v2
      -
        name: Docker meta
        id: docker_meta
-        uses: docker/metadata-action@57396166ad8aefe6098280995947635806a0e6ea # v3
+        uses: docker/metadata-action@507c2f2dc502c992ad446e3d7a5dfbe311567a96 # v3
        with:
          images: |
            chrislusf/seaweedfs
@@ -48,7 +48,7 @@ jobs:
          password: ${{ secrets.DOCKER_PASSWORD }}
      -
        name: Build
-        uses: docker/build-push-action@c56af957549030174b10d6867f20e78cfd7debc5 # v2
+        uses: docker/build-push-action@37abcedcc1da61a57767b7588cb9d03eb57e28b3 # v2
        with:
          context: ./docker
          push: ${{ github.event_name != 'pull_request' }}
@@ -16,11 +16,11 @@ jobs:
    steps:
      -
        name: Checkout
-        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v2
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v2
      -
        name: Docker meta
        id: docker_meta
-        uses: docker/metadata-action@57396166ad8aefe6098280995947635806a0e6ea # v3
+        uses: docker/metadata-action@507c2f2dc502c992ad446e3d7a5dfbe311567a96 # v3
        with:
          images: |
            chrislusf/seaweedfs
@@ -47,7 +47,7 @@ jobs:
          password: ${{ secrets.DOCKER_PASSWORD }}
      -
        name: Build
-        uses: docker/build-push-action@c56af957549030174b10d6867f20e78cfd7debc5 # v2
+        uses: docker/build-push-action@37abcedcc1da61a57767b7588cb9d03eb57e28b3 # v2
        with:
          context: ./docker
          push: ${{ github.event_name != 'pull_request' }}
@@ -16,11 +16,11 @@ jobs:
    steps:
      -
        name: Checkout
-        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v2
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v2
      -
        name: Docker meta
        id: docker_meta
-        uses: docker/metadata-action@57396166ad8aefe6098280995947635806a0e6ea # v3
+        uses: docker/metadata-action@507c2f2dc502c992ad446e3d7a5dfbe311567a96 # v3
        with:
          images: |
            chrislusf/seaweedfs
@@ -47,7 +47,7 @@ jobs:
          password: ${{ secrets.DOCKER_PASSWORD }}
      -
        name: Build
-        uses: docker/build-push-action@c56af957549030174b10d6867f20e78cfd7debc5 # v2
+        uses: docker/build-push-action@37abcedcc1da61a57767b7588cb9d03eb57e28b3 # v2
        with:
          context: ./docker
          push: ${{ github.event_name != 'pull_request' }}
@@ -9,6 +9,6 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - name: 'Checkout Repository'
-        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
      - name: 'Dependency Review'
-        uses: actions/dependency-review-action@0efb1d1d84fc9633afcdaad14c485cbbc90ef46c
+        uses: actions/dependency-review-action@c090f4e553673e6e505ea70d6a95362ee12adb94
@@ -24,13 +24,13 @@ jobs:
    timeout-minutes: 15
    steps:
    - name: Set up Go 1.x
-      uses: actions/setup-go@c4a742cab115ed795e34d4513e2cf7d472deb55f # v2
+      uses: actions/setup-go@6edd4406fa81c3da01a34fa6f6343087c207a568 # v2
      with:
        go-version: ^1.13
      id: go

    - name: Check out code into the Go module directory
-      uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v2
+      uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v2

    - name: Install dependencies
      run: |
@@ -42,28 +42,43 @@ jobs:
      run: make build_e2e && docker compose -f ./compose/e2e-mount.yml up --wait

    - name: Run FIO
-      timeout-minutes: 5
+      timeout-minutes: 15
      run: |
        echo "Starting FIO at: $(date)"
        # Concurrent r/w
        echo 'Run randrw with size=16M bs=4k'
-        docker compose -f ./compose/e2e-mount.yml exec mount timeout -k5 40 fio --name=fiotest --filename=/mnt/seaweedfs/fiotest --size=16M --rw=randrw --bs=4k --direct=1 --numjobs=8 --ioengine=libaio --iodepth=32 --group_reporting --runtime=30 --time_based=1
-        
-        echo 'Run randrw with size=16M bs=128k'
-        docker compose -f ./compose/e2e-mount.yml exec mount timeout -k5 40 fio --name=fiotest --filename=/mnt/seaweedfs/fiotest --size=16M --rw=randrw --bs=128k --direct=1 --numjobs=8 --ioengine=libaio --iodepth=32 --group_reporting --runtime=30 --time_based=1
-        
-        echo 'Run randrw with size=16M bs=1m'
-        docker compose -f ./compose/e2e-mount.yml exec mount timeout -k5 40 fio --name=fiotest --filename=/mnt/seaweedfs/fiotest --size=16M --rw=randrw --bs=1m --direct=1 --numjobs=8 --ioengine=libaio --iodepth=32 --group_reporting --runtime=30 --time_based=1
-        
+        docker compose -f ./compose/e2e-mount.yml exec mount timeout -k5 60 fio --name=fiotest --filename=/mnt/seaweedfs/fiotest --size=16M --rw=randrw --bs=4k --direct=1 --numjobs=8 --ioengine=libaio --iodepth=32 --group_reporting --runtime=30 --time_based=1
+
+        echo "Verify FIO at: $(date)"
        # Verified write
        echo 'Run randwrite with size=16M bs=4k'
-        docker compose -f ./compose/e2e-mount.yml exec mount timeout -k5 40 fio --name=fiotest --filename=/mnt/seaweedfs/fiotest --size=16M --rw=randwrite --bs=4k --direct=1 --numjobs=8 --ioengine=libaio --iodepth=32 --group_reporting --runtime=30 --time_based=1 --do_verify=0 --verify=crc32c --verify_backlog=1
-        
+        docker compose -f ./compose/e2e-mount.yml exec mount timeout -k5 60 fio --name=fiotest --filename=/mnt/seaweedfs/fiotest --size=16M --rw=randwrite --bs=4k --direct=1 --numjobs=8 --ioengine=libaio --iodepth=32 --group_reporting --runtime=30 --time_based=1 --do_verify=0 --verify=crc32c --verify_backlog=1
+
+    - name: Run FIO
+      timeout-minutes: 15
+      run: |
+        echo "Starting FIO at: $(date)"
+        # Concurrent r/w
+        echo 'Run randrw with size=16M bs=128k'
+        docker compose -f ./compose/e2e-mount.yml exec mount timeout -k5 60 fio --name=fiotest --filename=/mnt/seaweedfs/fiotest --size=16M --rw=randrw --bs=128k --direct=1 --numjobs=8 --ioengine=libaio --iodepth=32 --group_reporting --runtime=30 --time_based=1
+
+        echo "Verify FIO at: $(date)"
+        # Verified write
        echo 'Run randwrite with size=16M bs=128k'
-        docker compose -f ./compose/e2e-mount.yml exec mount timeout -k5 40 fio --name=fiotest --filename=/mnt/seaweedfs/fiotest --size=16M --rw=randwrite --bs=128k --direct=1 --numjobs=8 --ioengine=libaio --iodepth=32 --group_reporting --runtime=30 --time_based=1 --do_verify=0 --verify=crc32c --verify_backlog=1
+        docker compose -f ./compose/e2e-mount.yml exec mount timeout -k5 60 fio --name=fiotest --filename=/mnt/seaweedfs/fiotest --size=16M --rw=randwrite --bs=128k --direct=1 --numjobs=8 --ioengine=libaio --iodepth=32 --group_reporting --runtime=30 --time_based=1 --do_verify=0 --verify=crc32c --verify_backlog=1
+
+    - name: Run FIO
+      timeout-minutes: 15
+      run: |
+        echo "Starting FIO at: $(date)"
+        # Concurrent r/w
+        echo 'Run randrw with size=16M bs=1m'
+        docker compose -f ./compose/e2e-mount.yml exec mount timeout -k5 60 fio --name=fiotest --filename=/mnt/seaweedfs/fiotest --size=16M --rw=randrw --bs=1m --direct=1 --numjobs=8 --ioengine=libaio --iodepth=32 --group_reporting --runtime=30 --time_based=1
        
+        echo "Verify FIO at: $(date)"
+        # Verified write
        echo 'Run randwrite with size=16M bs=1m'
-        docker compose -f ./compose/e2e-mount.yml exec mount timeout -k5 40 fio --name=fiotest --filename=/mnt/seaweedfs/fiotest --size=16M --rw=randwrite --bs=1m --direct=1 --numjobs=8 --ioengine=libaio --iodepth=32 --group_reporting --runtime=30 --time_based=1 --do_verify=0 --verify=crc32c --verify_backlog=1
+        docker compose -f ./compose/e2e-mount.yml exec mount timeout -k5 60 fio --name=fiotest --filename=/mnt/seaweedfs/fiotest --size=16M --rw=randwrite --bs=1m --direct=1 --numjobs=8 --ioengine=libaio --iodepth=32 --group_reporting --runtime=30 --time_based=1 --do_verify=0 --verify=crc32c --verify_backlog=1

    - name: Save logs
      if: always()
@@ -21,13 +21,13 @@ jobs:
    steps:

    - name: Set up Go 1.x
-      uses: actions/setup-go@c4a742cab115ed795e34d4513e2cf7d472deb55f # v2
+      uses: actions/setup-go@6edd4406fa81c3da01a34fa6f6343087c207a568 # v2
      with:
        go-version: ^1.13
      id: go

    - name: Check out code into the Go module directory
-      uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v2
+      uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v2

    - name: Get dependencies
      run: |
@@ -0,0 +1,74 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to make participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, gender identity and expression, level of experience,
+nationality, personal appearance, race, religion, or sexual identity and
+orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+- Using welcoming and inclusive language
+- Being respectful of differing viewpoints and experiences
+- Gracefully accepting constructive criticism
+- Focusing on what is best for the community
+- Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+- The use of sexualized language or imagery and unwelcome sexual attention or
+  advances
+- Trolling, insulting/derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+- Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting the project team at <enteremailhere>. All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at [http://contributor-covenant.org/version/1/4][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/
@@ -3,7 +3,7 @@

 [![Slack](https://img.shields.io/badge/slack-purple)](https://join.slack.com/t/seaweedfs/shared_invite/enQtMzI4MTMwMjU2MzA3LTEyYzZmZWYzOGQ3MDJlZWMzYmI0OTE4OTJiZjJjODBmMzUxNmYwODg0YjY3MTNlMjBmZDQ1NzQ5NDJhZWI2ZmY)
 [![Twitter](https://img.shields.io/twitter/follow/seaweedfs.svg?style=social&label=Follow)](https://twitter.com/intent/follow?screen_name=seaweedfs)
-[![Build Status](https://img.shields.io/github/workflow/status/chrislusf/seaweedfs/Go)](https://github.com/seaweedfs/seaweedfs/actions/workflows/go.yml)
+[![Build Status](https://img.shields.io/github/actions/workflow/status/seaweedfs/seaweedfs/go.yml)](https://github.com/seaweedfs/seaweedfs/actions/workflows/go.yml)
 [![GoDoc](https://godoc.org/github.com/seaweedfs/seaweedfs/weed?status.svg)](https://godoc.org/github.com/seaweedfs/seaweedfs/weed)
 [![Wiki](https://img.shields.io/badge/docs-wiki-blue.svg)](https://github.com/seaweedfs/seaweedfs/wiki)
 [![Docker Pulls](https://img.shields.io/docker/pulls/chrislusf/seaweedfs?maxAge=4800)](https://hub.docker.com/r/chrislusf/seaweedfs/)
@@ -79,7 +79,7 @@ Table of Contents
 `docker run -p 8333:8333 chrislusf/seaweedfs server -s3`

 ## Quick Start with Single Binary ##
-* Download the latest binary from https://github.com/seaweedfs/seaweedfs/releases and unzip a single binary file `weed` or `weed.exe`
+* Download the latest binary from https://github.com/seaweedfs/seaweedfs/releases and unzip a single binary file `weed` or `weed.exe`. Or run `go install github.com/seaweedfs/seaweedfs/weed@latest`.
 * Run `weed server -dir=/some/data/dir -s3` to start one master, one volume server, one filer, and one S3 gateway.

 Also, to increase capacity, just add more volume servers by running `weed volume -dir="/some/data/dir2" -mserver="<master_host>:9333" -port=8081` locally, or on a different machine, or on thousands of machines. That is it!
@@ -3,10 +3,10 @@ CREATE USER IF NOT EXISTS 'seaweedfs'@'%' IDENTIFIED BY 'secret';
 GRANT ALL PRIVILEGES ON seaweedfs.* TO 'seaweedfs'@'%';
 FLUSH PRIVILEGES;
 USE seaweedfs;
-CREATE TABLE IF NOT EXISTS filemeta (
-    dirhash     BIGINT         COMMENT 'first 64 bits of MD5 hash value of directory field',
-    name        VARCHAR(1000)  COMMENT 'directory or file name',
-    directory   TEXT           COMMENT 'full path to parent directory',
-    meta        LONGBLOB,
-    PRIMARY KEY (dirhash, name)
-) DEFAULT CHARSET=utf8;
+CREATE TABLE IF NOT EXISTS `filemeta` (
+    `dirhash`   BIGINT NOT NULL       COMMENT 'first 64 bits of MD5 hash value of directory field',
+    `name`      VARCHAR(766) NOT NULL COMMENT 'directory or file name',
+    `directory` TEXT NOT NULL         COMMENT 'full path to parent directory',
+    `meta`      LONGBLOB,
+    PRIMARY KEY (`dirhash`, `name`)
+) DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;
@@ -3,24 +3,24 @@ module github.com/seaweedfs/seaweedfs
 go 1.19

 require (
-	cloud.google.com/go v0.104.0 // indirect
-	cloud.google.com/go/pubsub v1.26.0
-	cloud.google.com/go/storage v1.27.0
+	cloud.google.com/go v0.107.0 // indirect
+	cloud.google.com/go/pubsub v1.28.0
+	cloud.google.com/go/storage v1.28.1
 	github.com/Azure/azure-pipeline-go v0.2.3
 	github.com/Azure/azure-storage-blob-go v0.15.0
-	github.com/Shopify/sarama v1.37.2
-	github.com/aws/aws-sdk-go v1.44.126
+	github.com/Shopify/sarama v1.38.1
+	github.com/aws/aws-sdk-go v1.44.184
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/bwmarrin/snowflake v0.3.0
 	github.com/cespare/xxhash/v2 v2.1.2 // indirect
 	github.com/coreos/go-semver v0.3.0 // indirect
-	github.com/coreos/go-systemd/v22 v22.3.3-0.20220203105225-a9a7ef127534 // indirect
+	github.com/coreos/go-systemd/v22 v22.5.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/disintegration/imaging v1.6.2
 	github.com/dustin/go-humanize v1.0.0
 	github.com/eapache/go-resiliency v1.3.0 // indirect
-	github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21 // indirect
+	github.com/eapache/go-xerial-snappy v0.0.0-20230111030713-bf00bc1b83b6 // indirect
 	github.com/eapache/queue v1.1.0 // indirect
 	github.com/facebookgo/clock v0.0.0-20150410010913-600d898af40a
 	github.com/facebookgo/ensure v0.0.0-20200202191622-63f1cf65ac4c // indirect
@@ -31,9 +31,9 @@ require (
 	github.com/fsnotify/fsnotify v1.6.0 // indirect
 	github.com/go-errors/errors v1.1.1 // indirect
 	github.com/go-redis/redis/v8 v8.11.5
-	github.com/go-redsync/redsync/v4 v4.6.0
-	github.com/go-sql-driver/mysql v1.6.0
-	github.com/go-zookeeper/zk v1.0.2 // indirect
+	github.com/go-redsync/redsync/v4 v4.7.1
+	github.com/go-sql-driver/mysql v1.7.0
+	github.com/go-zookeeper/zk v1.0.3 // indirect
 	github.com/gocql/gocql v0.0.0-20210707082121-9a3953d1826d
 	github.com/golang-jwt/jwt v3.2.2+incompatible
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
@@ -43,7 +43,7 @@ require (
 	github.com/google/go-cmp v0.5.9 // indirect
 	github.com/google/uuid v1.3.0
 	github.com/google/wire v0.5.0 // indirect
-	github.com/googleapis/gax-go/v2 v2.6.0 // indirect
+	github.com/googleapis/gax-go/v2 v2.7.0 // indirect
 	github.com/gorilla/mux v1.8.0
 	github.com/hailocab/go-hostpool v0.0.0-20160125115350-e80d13ce29ed // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
@@ -57,12 +57,12 @@ require (
 	github.com/json-iterator/go v1.1.12
 	github.com/karlseguin/ccache/v2 v2.0.8
 	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 // indirect
-	github.com/klauspost/compress v1.15.11 // indirect
-	github.com/klauspost/reedsolomon v1.11.1
+	github.com/klauspost/compress v1.15.14 // indirect
+	github.com/klauspost/reedsolomon v1.11.3
 	github.com/kurin/blazer v0.5.3
 	github.com/lib/pq v1.10.7
-	github.com/linxGnu/grocksdb v1.7.10
-	github.com/magiconair/properties v1.8.6 // indirect
+	github.com/linxGnu/grocksdb v1.7.14
+	github.com/magiconair/properties v1.8.7 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/mattn/go-ieproxy v0.0.9 // indirect
 	github.com/mattn/go-isatty v0.0.16 // indirect
@@ -71,29 +71,28 @@ require (
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/olivere/elastic/v7 v7.0.32
-	github.com/pelletier/go-toml v1.9.5 // indirect
 	github.com/peterh/liner v1.2.2
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/posener/complete v1.2.3
 	github.com/pquerna/cachecontrol v0.1.0
-	github.com/prometheus/client_golang v1.13.0
-	github.com/prometheus/client_model v0.2.0 // indirect
+	github.com/prometheus/client_golang v1.14.0
+	github.com/prometheus/client_model v0.3.0 // indirect
 	github.com/prometheus/common v0.37.0 // indirect
-	github.com/prometheus/procfs v0.8.0
+	github.com/prometheus/procfs v0.9.0
 	github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0 // indirect
 	github.com/seaweedfs/goexif v2.0.0+incompatible
 	github.com/seaweedfs/raft v1.1.0
 	github.com/sirupsen/logrus v1.9.0 // indirect
-	github.com/spf13/afero v1.9.2 // indirect
+	github.com/spf13/afero v1.9.3 // indirect
 	github.com/spf13/cast v1.5.0 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/spf13/viper v1.14.0
+	github.com/spf13/viper v1.15.0
 	github.com/stretchr/testify v1.8.1
 	github.com/stvp/tempredis v0.0.0-20181119212430-b82af8480203
 	github.com/syndtr/goleveldb v1.0.1-0.20190318030020-c3a204f8e965
-	github.com/tidwall/gjson v1.14.3
+	github.com/tidwall/gjson v1.14.4
 	github.com/tidwall/match v1.1.1
 	github.com/tidwall/pretty v1.2.0 // indirect
 	github.com/tsuna/gohbase v0.0.0-20201125011725-348991136365
@@ -103,77 +102,78 @@ require (
 	github.com/viant/ptrie v0.3.0
 	github.com/viant/toolbox v0.33.2 // indirect
 	github.com/xdg-go/pbkdf2 v1.0.0 // indirect
-	github.com/xdg-go/scram v1.1.1 // indirect
-	github.com/xdg-go/stringprep v1.0.3 // indirect
+	github.com/xdg-go/scram v1.1.2 // indirect
+	github.com/xdg-go/stringprep v1.0.4 // indirect
 	github.com/youmark/pkcs8 v0.0.0-20181117223130-1be2e3e5546d // indirect
-	go.etcd.io/etcd/client/v3 v3.5.5
-	go.mongodb.org/mongo-driver v1.11.0
-	go.opencensus.io v0.23.0 // indirect
-	gocloud.dev v0.27.0
-	gocloud.dev/pubsub/natspubsub v0.27.0
+	go.etcd.io/etcd/client/v3 v3.5.6
+	go.mongodb.org/mongo-driver v1.11.1
+	go.opencensus.io v0.24.0 // indirect
+	gocloud.dev v0.28.0
+	gocloud.dev/pubsub/natspubsub v0.28.0
 	gocloud.dev/pubsub/rabbitpubsub v0.27.0
-	golang.org/x/crypto v0.1.0 // indirect
-	golang.org/x/exp v0.0.0-20220414153411-bcd21879b8fd
+	golang.org/x/crypto v0.3.0 // indirect
+	golang.org/x/exp v0.0.0-20221031165847-c99f073a8326
 	golang.org/x/image v0.0.0-20200119044424-58c23975cae1
-	golang.org/x/net v0.1.0
-	golang.org/x/oauth2 v0.0.0-20221014153046-6fdb5e3db783 // indirect
-	golang.org/x/sys v0.1.0
-	golang.org/x/text v0.4.0 // indirect
-	golang.org/x/tools v0.2.0
+	golang.org/x/net v0.5.0
+	golang.org/x/oauth2 v0.2.0 // indirect
+	golang.org/x/sys v0.4.0
+	golang.org/x/text v0.6.0 // indirect
+	golang.org/x/tools v0.5.0
 	golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 // indirect
-	google.golang.org/api v0.102.0
+	google.golang.org/api v0.107.0
 	google.golang.org/appengine v1.6.7 // indirect
-	google.golang.org/genproto v0.0.0-20221024183307-1bc688fe9f3e // indirect
-	google.golang.org/grpc v1.50.1
+	google.golang.org/genproto v0.0.0-20221227171554-f9683d7f8bef // indirect
+	google.golang.org/grpc v1.52.0
 	google.golang.org/protobuf v1.28.1
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	modernc.org/b v1.0.0 // indirect
 	modernc.org/cc/v3 v3.40.0 // indirect
 	modernc.org/ccgo/v3 v3.16.13 // indirect
-	modernc.org/libc v1.21.4 // indirect
+	modernc.org/libc v1.22.2 // indirect
 	modernc.org/mathutil v1.5.0 // indirect
 	modernc.org/memory v1.4.0 // indirect
 	modernc.org/opt v0.1.3 // indirect
-	modernc.org/sqlite v1.19.4
+	modernc.org/sqlite v1.20.1
 	modernc.org/strutil v1.1.3
 	modernc.org/token v1.0.1 // indirect
 )

 require (
-	github.com/Jille/raft-grpc-transport v1.2.0
-	github.com/arangodb/go-driver v1.4.0
+	github.com/Jille/raft-grpc-transport v1.3.0
+	github.com/arangodb/go-driver v1.4.1
 	github.com/armon/go-metrics v0.4.1
 	github.com/fluent/fluent-logger-golang v1.9.0
-	github.com/google/flatbuffers v22.10.26+incompatible
+	github.com/google/flatbuffers/go v0.0.0-20230108230133-3b8644d32c50
 	github.com/hanwen/go-fuse/v2 v2.1.1-0.20220627082937-d01fda7edf17
 	github.com/hashicorp/raft v1.3.11
 	github.com/hashicorp/raft-boltdb/v2 v2.2.2
 	github.com/rabbitmq/amqp091-go v1.5.0
-	github.com/tikv/client-go/v2 v2.0.2
+	github.com/schollz/progressbar/v3 v3.12.2
+	github.com/tikv/client-go/v2 v2.0.4
 	github.com/ydb-platform/ydb-go-sdk-auth-environ v0.1.2
-	github.com/ydb-platform/ydb-go-sdk/v3 v3.39.0
-	golang.org/x/sync v0.1.0
+	github.com/ydb-platform/ydb-go-sdk/v3 v3.42.5
 	google.golang.org/grpc/security/advancedtls v0.0.0-20220622233350-5cdb09fa29c1
 )

 require (
-	cloud.google.com/go/compute v1.12.1 // indirect
-	cloud.google.com/go/compute/metadata v0.2.1 // indirect
-	cloud.google.com/go/iam v0.5.0 // indirect
+	cloud.google.com/go/compute v1.14.0 // indirect
+	cloud.google.com/go/compute/metadata v0.2.3 // indirect
+	cloud.google.com/go/iam v0.8.0 // indirect
 	github.com/arangodb/go-velocypack v0.0.0-20200318135517-5af53c29c67e // indirect
-	github.com/aws/aws-sdk-go-v2 v1.16.8 // indirect
-	github.com/aws/aws-sdk-go-v2/config v1.15.15 // indirect
-	github.com/aws/aws-sdk-go-v2/credentials v1.12.10 // indirect
-	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.12.9 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.15 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.4.9 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/ini v1.3.16 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.9.9 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sns v1.17.10 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sqs v1.19.1 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sso v1.11.13 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sts v1.16.10 // indirect
-	github.com/aws/smithy-go v1.12.0 // indirect
+	github.com/aws/aws-sdk-go-v2 v1.17.1 // indirect
+	github.com/aws/aws-sdk-go-v2/config v1.18.3 // indirect
+	github.com/aws/aws-sdk-go-v2/credentials v1.13.3 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.12.19 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.25 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.4.19 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/ini v1.3.26 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.9.19 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sns v1.18.6 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sqs v1.19.15 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sso v1.11.25 // indirect
+	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.13.8 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sts v1.17.5 // indirect
+	github.com/aws/smithy-go v1.13.4 // indirect
 	github.com/benbjohnson/clock v1.1.0 // indirect
 	github.com/boltdb/bolt v1.3.1 // indirect
 	github.com/cznic/mathutil v0.0.0-20181122101859-297441e03548 // indirect
@@ -182,8 +182,8 @@ require (
 	github.com/fatih/color v1.13.0 // indirect
 	github.com/fclairamb/go-log v0.4.1 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
-	github.com/golang-jwt/jwt/v4 v4.4.2 // indirect
-	github.com/googleapis/enterprise-certificate-proxy v0.2.0 // indirect
+	github.com/golang-jwt/jwt/v4 v4.4.3 // indirect
+	github.com/googleapis/enterprise-certificate-proxy v0.2.1 // indirect
 	github.com/grpc-ecosystem/go-grpc-middleware v1.3.0 // indirect
 	github.com/hashicorp/go-hclog v1.2.0 // indirect
 	github.com/hashicorp/go-immutable-radix v1.3.1 // indirect
@@ -196,38 +196,43 @@ require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/klauspost/cpuid/v2 v2.1.1 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/mattn/go-runewidth v0.0.7 // indirect
+	github.com/mattn/go-runewidth v0.0.14 // indirect
 	github.com/mattn/go-sqlite3 v2.0.1+incompatible // indirect
+	github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db // indirect
 	github.com/montanaflynn/stats v0.6.6 // indirect
-	github.com/nats-io/nats.go v1.16.0 // indirect
+	github.com/nats-io/nats.go v1.20.0 // indirect
 	github.com/nats-io/nkeys v0.3.0 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/opentracing/opentracing-go v1.2.0 // indirect
-	github.com/pelletier/go-toml/v2 v2.0.5 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.6 // indirect
 	github.com/philhofer/fwd v1.1.1 // indirect
 	github.com/pierrec/lz4/v4 v4.1.17 // indirect
 	github.com/pingcap/errors v0.11.5-0.20211224045212-9687c2b0f87c // indirect
 	github.com/pingcap/failpoint v0.0.0-20210918120811-547c13e3eb00 // indirect
-	github.com/pingcap/kvproto v0.0.0-20221026112947-f8d61344b172 // indirect
+	github.com/pingcap/kvproto v0.0.0-20221129023506-621ec37aac7a // indirect
 	github.com/pingcap/log v1.1.1-0.20221015072633-39906604fb81 // indirect
+	github.com/rivo/uniseg v0.4.3 // indirect
 	github.com/rwcarlsen/goexif v0.0.0-20190401172101-9e8deecbddbd // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/stathat/consistent v1.0.0 // indirect
-	github.com/subosito/gotenv v1.4.1 // indirect
+	github.com/subosito/gotenv v1.4.2 // indirect
+	github.com/tiancaiamao/gp v0.0.0-20221230034425-4025bc8a4d4a // indirect
 	github.com/tikv/pd/client v0.0.0-20221031025758-80f0d8ca4d07 // indirect
 	github.com/tinylib/msgp v1.1.6 // indirect
 	github.com/twmb/murmur3 v1.1.3 // indirect
 	github.com/yandex-cloud/go-genproto v0.0.0-20211115083454-9ca41db5ed9e // indirect
-	github.com/ydb-platform/ydb-go-genproto v0.0.0-20220922065549-66df47a830ba // indirect
+	github.com/ydb-platform/ydb-go-genproto v0.0.0-20221215182650-986f9d10542f // indirect
 	github.com/ydb-platform/ydb-go-yc v0.8.3 // indirect
 	github.com/ydb-platform/ydb-go-yc-metadata v0.5.2 // indirect
 	go.etcd.io/bbolt v1.3.6 // indirect
-	go.etcd.io/etcd/api/v3 v3.5.5 // indirect
-	go.etcd.io/etcd/client/pkg/v3 v3.5.5 // indirect
-	go.uber.org/atomic v1.9.0 // indirect
+	go.etcd.io/etcd/api/v3 v3.5.6 // indirect
+	go.etcd.io/etcd/client/pkg/v3 v3.5.6 // indirect
+	go.uber.org/atomic v1.10.0 // indirect
 	go.uber.org/multierr v1.8.0 // indirect
-	go.uber.org/zap v1.22.0 // indirect
-	golang.org/x/mod v0.6.0 // indirect
+	go.uber.org/zap v1.24.0 // indirect
+	golang.org/x/mod v0.7.0 // indirect
+	golang.org/x/sync v0.1.0 // indirect
+	golang.org/x/term v0.4.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	gopkg.in/natefinch/lumberjack.v2 v2.0.0 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
@@ -1,5 +1,5 @@
 apiVersion: v1
 description: SeaweedFS
 name: seaweedfs
-appVersion: "3.35"
-version: "3.35"
+appVersion: "3.41"
+version: "3.41"
@@ -14,13 +14,13 @@ with ENV.
 A running MySQL-compatible database is expected by default, as specified in the `values.yaml` at `filer.extraEnvironmentVars`. 
 This database should be pre-configured and initialized by running:
 ```sql
-CREATE TABLE IF NOT EXISTS filemeta (
-  dirhash     BIGINT               COMMENT 'first 64 bits of MD5 hash value of directory field',
-  name        VARCHAR(1000) BINARY COMMENT 'directory or file name',
-  directory   TEXT BINARY          COMMENT 'full path to parent directory',
-  meta        LONGBLOB,
-  PRIMARY KEY (dirhash, name)
-) DEFAULT CHARSET=utf8;
+CREATE TABLE IF NOT EXISTS `filemeta` (
+  `dirhash`   BIGINT NOT NULL       COMMENT 'first 64 bits of MD5 hash value of directory field',
+  `name`      VARCHAR(766) NOT NULL COMMENT 'directory or file name',
+  `directory` TEXT NOT NULL         COMMENT 'full path to parent directory',
+  `meta`      LONGBLOB,
+  PRIMARY KEY (`dirhash`, `name`)
+) DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;
 ```

 Alternative database can also be configured (e.g. leveldb) following the instructions at `filer.extraEnvironmentVars`.
@@ -101,7 +101,12 @@ spec:
            - "/bin/sh"
            - "-ec"
            - | 
-              exec /usr/bin/weed -logdir=/logs \
+              exec /usr/bin/weed \
+              {{- if eq .Values.filer.logs.type "hostPath" }}
+              -logdir=/logs \
+              {{- else }}
+              -logtostderr=true \
+              {{- end }}
              {{- if .Values.filer.loggingOverrideLevel }}
              -v={{ .Values.filer.loggingOverrideLevel }} \
              {{- else }}
@@ -225,13 +230,13 @@ spec:
        {{- if eq .Values.filer.logs.type "hostPath" }}
        - name: seaweedfs-filer-log-volume
          hostPath:
-            path: /storage/logs/seaweedfs/filer
+            path: {{ .Values.filer.logs.hostPathPrefix }}/logs/seaweedfs/filer
            type: DirectoryOrCreate
        {{- end }}
        {{- if eq .Values.filer.data.type "hostPath" }}
        - name: data-filer
          hostPath:
-            path: /storage/filer_store
+            path: {{ .Values.filer.data.hostPathPrefix }}/filer_store
            type: DirectoryOrCreate
        {{- end }}
        - name: db-schema-config-volume
@@ -90,7 +90,12 @@ spec:
            - "/bin/sh"
            - "-ec"
            - | 
-              exec /usr/bin/weed -logdir=/logs \
+              exec /usr/bin/weed \
+              {{- if eq .Values.master.logs.type "hostPath" }}
+              -logdir=/logs \
+              {{- else }}
+              -logtostderr=true \
+              {{- end }}
              {{- if .Values.master.loggingOverrideLevel }}
              -v={{ .Values.master.loggingOverrideLevel }} \
              {{- else }}
@@ -196,13 +201,13 @@ spec:
        {{- if eq .Values.master.logs.type "hostPath" }}
        - name: seaweedfs-master-log-volume
          hostPath:
-            path: /storage/logs/seaweedfs/master
+            path: {{ .Values.master.logs.hostPathPrefix }}/logs/seaweedfs/master
            type: DirectoryOrCreate
        {{- end }}
        {{- if eq .Values.master.data.type "hostPath" }}
        - name: data-{{ .Release.Namespace }}
          hostPath:
-            path: /ssd/seaweed-master/
+            path: {{ .Values.master.data.hostPathPrefix }}/seaweed-master/
            type: DirectoryOrCreate
        {{- end }}
        {{- if .Values.global.enableSecurity }}
@@ -72,13 +72,19 @@ spec:
            - "/bin/sh"
            - "-ec"
            - | 
-              exec /usr/bin/weed -logdir=/logs \
+              exec /usr/bin/weed \
+               {{- if eq .Values.s3.logs.type "hostPath" }}
+              -logdir=/logs \
+              {{- else }}
+              -logtostderr=true \
+              {{- end }}
              {{- if .Values.s3.loggingOverrideLevel }}
              -v={{ .Values.s3.loggingOverrideLevel }} \
              {{- else }}
              -v={{ .Values.global.loggingLevel }} \
              {{- end }}
              s3 \
+              -ip.bind={{ .Values.s3.bindAddress }} \
              -port={{ .Values.s3.port }} \
              {{- if .Values.s3.metricsPort }}
              -metricsPort {{ .Values.s3.metricsPort }} \
@@ -167,7 +173,7 @@ spec:
        {{- if eq .Values.s3.logs.type "hostPath" }}
        - name: logs
          hostPath:
-            path: /storage/logs/seaweedfs/s3
+            path: {{ .Values.s3.logs.hostPathPrefix }}/logs/seaweedfs/s3
            type: DirectoryOrCreate
        {{- end }}
        {{- if .Values.global.enableSecurity }}
@@ -93,7 +93,12 @@ spec:
            - "/bin/sh"
            - "-ec"
            - |
-              exec /usr/bin/weed -logdir=/logs \
+              exec /usr/bin/weed \
+                {{- if eq .Values.volume.logs.type "hostPath" }}
+                -logdir=/logs \
+                {{- else }}
+                -logtostderr=true \
+                {{- end }}
                {{- if .Values.volume.loggingOverrideLevel }}
                -v={{ .Values.volume.loggingOverrideLevel }} \
                {{- else }}
@@ -206,19 +211,19 @@ spec:
        {{- if eq .Values.volume.data.type "hostPath" }}
        - name: data
          hostPath:
-            path: /storage/object_store/
+            path: {{ .Values.volume.data.hostPathPrefix }}/object_store/
            type: DirectoryOrCreate
        {{- end }}
        {{- if and (eq .Values.volume.idx.type "hostPath") .Values.volume.dir_idx }}
        - name: idx
          hostPath:
-            path: /ssd/seaweedfs-volume-idx/
+            path: {{ .Values.volume.idx.hostPathPrefix }}/seaweedfs-volume-idx/
            type: DirectoryOrCreate
        {{- end }}
        {{- if eq .Values.volume.logs.type "hostPath" }}
        - name: logs
          hostPath:
-            path: /storage/logs/seaweedfs/volume
+            path: {{ .Values.volume.logs.hostPathPrefix }}/logs/seaweedfs/volume
            type: DirectoryOrCreate
        {{- end }}
        {{- if .Values.global.enableSecurity }}
@@ -68,11 +68,13 @@ master:
    type: "hostPath"
    size: ""
    storageClass: ""
+    hostPathPrefix: /ssd

  logs:
    type: "hostPath"
    size: ""
    storageClass: ""
+    hostPathPrefix: /storage

  initContainers: ""

@@ -176,15 +178,19 @@ volume:
    type: "hostPath"
    size: ""
    storageClass: ""
+    hostPathPrefix: /storage
+
  idx:
    type: "hostPath"
    size: ""
    storageClass: ""
+    hostPathPrefix: /ssd

  logs:
    type: "hostPath"
    size: ""
    storageClass: ""
+    hostPathPrefix: /storage

  # limit background compaction or copying speed in mega bytes per second
  compactionMBps: "50"
@@ -308,11 +314,13 @@ filer:
    type: "hostPath"
    size: ""
    storageClass: ""
+    hostPathPrefix: /storage

  logs:
    type: "hostPath"
    size: ""
    storageClass: ""
+    hostPathPrefix: /storage

  initContainers: ""

@@ -418,6 +426,7 @@ s3:
  imageTag: null
  restartPolicy: null
  replicas: 1
+  bindAddress: 0.0.0.0
  port: 8333
  metricsPort: 9327
  loggingOverrideLevel: null
@@ -463,7 +472,7 @@ s3:
    type: "hostPath"
    size: ""
    storageClass: ""
-
+    hostPathPrefix: /storage

 certificates:
  commonName: "SeaweedFS CA"
@@ -6,6 +6,7 @@ import (
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
+	"github.com/seaweedfs/seaweedfs/weed/util"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials/insecure"
 	"strconv"
@@ -52,7 +53,7 @@ func main() {
 }

 func startGenerateMetadata() {
-	pb.WithFilerClient(false, pb.ServerAddress(*tailFiler), grpc.WithTransportCredentials(insecure.NewCredentials()), func(client filer_pb.SeaweedFilerClient) error {
+	pb.WithFilerClient(false, util.RandomInt32(), pb.ServerAddress(*tailFiler), grpc.WithTransportCredentials(insecure.NewCredentials()), func(client filer_pb.SeaweedFilerClient) error {

 		for i := 0; i < *n; i++ {
 			name := fmt.Sprintf("file%d", i)
@@ -59,7 +59,7 @@ func walkMetaFile(dst *os.File) error {
 		}

 		fmt.Fprintf(os.Stdout, "file %s %v\n", util.FullPath(fullEntry.Dir).Child(fullEntry.Entry.Name), fullEntry.Entry.Attributes.String())
-		for i, chunk := range fullEntry.Entry.Chunks {
+		for i, chunk := range fullEntry.Entry.GetChunks() {
 			fmt.Fprintf(os.Stdout, "  chunk: %d %v %d,%x%08x\n", i+1, chunk, chunk.Fid.VolumeId, chunk.Fid.FileKey, chunk.Fid.Cookie)
 		}

@@ -5,13 +5,14 @@ import (
 	"errors"
 	"flag"
 	"fmt"
+	"io"
+
 	"github.com/seaweedfs/seaweedfs/weed/operation"
 	"github.com/seaweedfs/seaweedfs/weed/pb"
 	"github.com/seaweedfs/seaweedfs/weed/pb/volume_server_pb"
 	"github.com/seaweedfs/seaweedfs/weed/security"
 	"github.com/seaweedfs/seaweedfs/weed/util"
 	"google.golang.org/grpc"
-	"io"
 )

 var (
@@ -29,7 +30,7 @@ func main() {
 	vid := uint32(*volumeId)

 	eachNeedleFunc := func(resp *volume_server_pb.ReadAllNeedlesResponse) error {
-		fmt.Printf("%d,%x%08x %d\n", resp.VolumeId, resp.NeedleId, resp.Cookie, len(resp.NeedleBlob))
+		fmt.Printf("%d,%x%08x %d %v %d %x\n", resp.VolumeId, resp.NeedleId, resp.Cookie, len(resp.NeedleBlob), resp.NeedleBlobCompressed, resp.LastModified, resp.Crc)
 		return nil
 	}

@@ -15,44 +15,44 @@ clean:

 debug_shell:
 	go build -gcflags="all=-N -l"
-	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- shell
+	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec ./weed -- shell

 debug_mount:
 	go build -gcflags="all=-N -l"
-	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- -v=4 mount -dir=~/tmp/mm -cacheCapacityMB=0 -filer.path=/ -umask=000
+	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec ./weed -- -v=4 mount -dir=~/tmp/mm -cacheCapacityMB=0 -filer.path=/ -umask=000

 debug_server:
 	go build -gcflags="all=-N -l"
-	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- server -dir=~/tmp/99 -filer -volume.port=8343 -s3 -volume.max=0 -master.volumeSizeLimitMB=1024 -volume.preStopSeconds=1
+	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec ./weed -- server -dir=~/tmp/99 -filer -volume.port=8343 -s3 -volume.max=0 -master.volumeSizeLimitMB=1024 -volume.preStopSeconds=1

 debug_volume:
 	go build -gcflags="all=-N -l"
-	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- volume -dir=~/tmp/100 -port 8564 -max=30 -preStopSeconds=2
+	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec ./weed -- volume -dir=~/tmp/100 -port 8564 -max=30 -preStopSeconds=2

 debug_webdav:
 	go build -gcflags="all=-N -l"
-	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- -v=4 webdav
+	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec ./weed -- -v=4 webdav

 debug_s3:
 	go build -gcflags="all=-N -l"
-	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- -v=4 s3
+	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec ./weed -- -v=4 s3

 debug_filer_copy:
 	go build -gcflags="all=-N -l"
-	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- -v=4 filer.backup -filer=localhost:8888 -filerProxy -timeAgo=10h
+	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec ./weed -- -v=4 filer.backup -filer=localhost:8888 -filerProxy -timeAgo=10h

 debug_filer_remote_sync_dir:
 	go build -gcflags="all=-N -l"
-	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- -v=4 filer.remote.sync -filer="localhost:8888" -dir=/buckets/b2 -timeAgo=1h
+	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec ./weed -- -v=4 filer.remote.sync -filer="localhost:8888" -dir=/buckets/b2 -timeAgo=1h

 debug_filer_remote_sync_buckets:
 	go build -gcflags="all=-N -l"
-	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- -v=4 filer.remote.sync -filer="localhost:8888" -createBucketAt=cloud1 -timeAgo=1h
+	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec ./weed -- -v=4 filer.remote.sync -filer="localhost:8888" -createBucketAt=cloud1 -timeAgo=1h

 debug_master_follower:
 	go build -gcflags="all=-N -l"
-	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- -v=4 master.follower
+	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec ./weed -- -v=4 master.follower

 debug_filer_sync:
 	go build -gcflags="all=-N -l"
-	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- -v=4 filer.sync -a 192.168.2.7:8888 -b 192.168.2.7:8889 -isActivePassive -b.debug
+	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec ./weed -- -v=4 filer.sync -a 192.168.2.7:8888 -b 192.168.2.7:8889 -isActivePassive -b.debug
@@ -113,6 +113,7 @@ func init() {
 	filerWebDavOptions.tlsCertificate = cmdFiler.Flag.String("webdav.cert.file", "", "path to the TLS certificate file")
 	filerWebDavOptions.cacheDir = cmdFiler.Flag.String("webdav.cacheDir", os.TempDir(), "local cache directory for file chunks")
 	filerWebDavOptions.cacheSizeMB = cmdFiler.Flag.Int64("webdav.cacheCapacityMB", 0, "local cache capacity in MB")
+	filerWebDavOptions.filerRootPath = cmdFiler.Flag.String("webdav.filer.path", "/", "use this remote path from filer server")

 	// start iam on filer
 	filerStartIam = cmdFiler.Flag.Bool("iam", false, "whether to start IAM service")
@@ -162,7 +163,7 @@ func runFiler(cmd *Command, args []string) bool {

 	util.LoadConfiguration("security", false)

-	go stats_collect.StartMetricsServer(*f.metricsHttpPort)
+	go stats_collect.StartMetricsServer(*f.bindIp, *f.metricsHttpPort)

 	filerAddress := util.JoinHostPort(*f.ip, *f.port)
 	startDelay := time.Duration(2)
@@ -96,7 +96,7 @@ func runFilerCat(cmd *Command, args []string) bool {
 		writer = f
 	}

-	pb.WithFilerClient(false, filerCat.filerAddress, filerCat.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	pb.WithFilerClient(false, util.RandomInt32(), filerCat.filerAddress, filerCat.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {

 		request := &filer_pb.LookupDirectoryEntryRequest{
 			Name:      name,
@@ -114,7 +114,7 @@ func runFilerCat(cmd *Command, args []string) bool {

 		filerCat.filerClient = client

-		return filer.StreamContent(&filerCat, writer, respLookupEntry.Entry.Chunks, 0, int64(filer.FileSize(respLookupEntry.Entry)))
+		return filer.StreamContent(&filerCat, writer, respLookupEntry.Entry.GetChunks(), 0, int64(filer.FileSize(respLookupEntry.Entry)))

 	})

@@ -159,6 +159,7 @@ func runCopy(cmd *Command, args []string) bool {
 			worker := FileCopyWorker{
 				options:      &copy,
 				filerAddress: filerAddress,
+				signature:    util.RandomInt32(),
 			}
 			if err := worker.copyFiles(fileCopyTaskChan); err != nil {
 				fmt.Fprintf(os.Stderr, "copy file error: %v\n", err)
@@ -172,7 +173,7 @@ func runCopy(cmd *Command, args []string) bool {
 }

 func readFilerConfiguration(grpcDialOption grpc.DialOption, filerGrpcAddress pb.ServerAddress) (masters []string, collection, replication string, dirBuckets string, maxMB uint32, cipher bool, err error) {
-	err = pb.WithGrpcFilerClient(false, filerGrpcAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	err = pb.WithGrpcFilerClient(false, 0, filerGrpcAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
 		if err != nil {
 			return fmt.Errorf("get filer %s configuration: %v", filerGrpcAddress, err)
@@ -225,6 +226,7 @@ func genFileCopyTask(fileOrDir string, destPath string, fileCopyTaskChan chan Fi
 type FileCopyWorker struct {
 	options      *CopyOptions
 	filerAddress pb.ServerAddress
+	signature    int32
 }

 func (worker *FileCopyWorker) copyFiles(fileCopyTaskChan chan FileCopyTask) error {
@@ -302,7 +304,7 @@ func (worker *FileCopyWorker) checkExistingFileFirst(task FileCopyTask, f *os.Fi
 		return
 	}

-	err = pb.WithGrpcFilerClient(false, worker.filerAddress, worker.options.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	err = pb.WithGrpcFilerClient(false, worker.signature, worker.filerAddress, worker.options.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {

 		request := &filer_pb.LookupDirectoryEntryRequest{
 			Directory: task.destinationUrlPath,
@@ -365,10 +367,10 @@ func (worker *FileCopyWorker) uploadFileAsOne(task FileCopyTask, f *os.File) err
 		if flushErr != nil {
 			return flushErr
 		}
-		chunks = append(chunks, uploadResult.ToPbFileChunk(finalFileId, 0))
+		chunks = append(chunks, uploadResult.ToPbFileChunk(finalFileId, 0, time.Now().UnixNano()))
 	}

-	if err := pb.WithGrpcFilerClient(false, worker.filerAddress, worker.options.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	if err := pb.WithGrpcFilerClient(false, worker.signature, worker.filerAddress, worker.options.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		request := &filer_pb.CreateEntryRequest{
 			Directory: task.destinationUrlPath,
 			Entry: &filer_pb.Entry{
@@ -450,7 +452,7 @@ func (worker *FileCopyWorker) uploadFileInChunks(task FileCopyTask, f *os.File,
 				uploadError = fmt.Errorf("upload %v result: %v\n", fileName, uploadResult.Error)
 				return
 			}
-			chunksChan <- uploadResult.ToPbFileChunk(fileId, i*chunkSize)
+			chunksChan <- uploadResult.ToPbFileChunk(fileId, i*chunkSize, time.Now().UnixNano())

 			fmt.Printf("uploaded %s-%d [%d,%d)\n", fileName, i+1, i*chunkSize, i*chunkSize+int64(uploadResult.Size))
 		}(i)
@@ -479,7 +481,7 @@ func (worker *FileCopyWorker) uploadFileInChunks(task FileCopyTask, f *os.File,
 		return fmt.Errorf("create manifest: %v", manifestErr)
 	}

-	if err := pb.WithGrpcFilerClient(false, worker.filerAddress, worker.options.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	if err := pb.WithGrpcFilerClient(false, worker.signature, worker.filerAddress, worker.options.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		request := &filer_pb.CreateEntryRequest{
 			Directory: task.destinationUrlPath,
 			Entry: &filer_pb.Entry{
@@ -530,7 +532,7 @@ func detectMimeType(f *os.File) string {
 	return mimeType
 }

-func (worker *FileCopyWorker) saveDataAsChunk(reader io.Reader, name string, offset int64) (chunk *filer_pb.FileChunk, err error) {
+func (worker *FileCopyWorker) saveDataAsChunk(reader io.Reader, name string, offset int64, tsNs int64) (chunk *filer_pb.FileChunk, err error) {

 	finalFileId, uploadResult, flushErr, _ := operation.UploadWithRetry(
 		worker,
@@ -561,7 +563,7 @@ func (worker *FileCopyWorker) saveDataAsChunk(reader io.Reader, name string, off
 	if uploadResult.Error != "" {
 		return nil, fmt.Errorf("upload result: %v", uploadResult.Error)
 	}
-	return uploadResult.ToPbFileChunk(finalFileId, offset), nil
+	return uploadResult.ToPbFileChunk(finalFileId, offset, tsNs), nil
 }

 var _ = filer_pb.FilerClient(&FileCopyWorker{})
@@ -569,7 +571,7 @@ var _ = filer_pb.FilerClient(&FileCopyWorker{})
 func (worker *FileCopyWorker) WithFilerClient(streamingMode bool, fn func(filer_pb.SeaweedFilerClient) error) (err error) {

 	filerGrpcAddress := worker.filerAddress.ToGrpcAddress()
-	err = pb.WithGrpcClient(streamingMode, func(grpcConnection *grpc.ClientConn) error {
+	err = pb.WithGrpcClient(streamingMode, worker.signature, func(grpcConnection *grpc.ClientConn) error {
 		client := filer_pb.NewSeaweedFilerClient(grpcConnection)
 		return fn(client)
 	}, filerGrpcAddress, false, worker.options.grpcDialOption)
@@ -225,7 +225,7 @@ var _ = filer_pb.FilerClient(&FilerMetaBackupOptions{})

 func (metaBackup *FilerMetaBackupOptions) WithFilerClient(streamingMode bool, fn func(filer_pb.SeaweedFilerClient) error) error {

-	return pb.WithFilerClient(streamingMode, pb.ServerAddress(*metaBackup.filerAddress), metaBackup.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	return pb.WithFilerClient(streamingMode, metaBackup.clientId, pb.ServerAddress(*metaBackup.filerAddress), metaBackup.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		return fn(client)
 	})

@@ -35,7 +35,7 @@ type RemoteGatewayOptions struct {
 var _ = filer_pb.FilerClient(&RemoteGatewayOptions{})

 func (option *RemoteGatewayOptions) WithFilerClient(streamingMode bool, fn func(filer_pb.SeaweedFilerClient) error) error {
-	return pb.WithFilerClient(streamingMode, pb.ServerAddress(*option.filerAddress), option.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	return pb.WithFilerClient(streamingMode, option.clientId, pb.ServerAddress(*option.filerAddress), option.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		return fn(client)
 	})
 }
@@ -26,7 +26,7 @@ type RemoteSyncOptions struct {
 var _ = filer_pb.FilerClient(&RemoteSyncOptions{})

 func (option *RemoteSyncOptions) WithFilerClient(streamingMode bool, fn func(filer_pb.SeaweedFilerClient) error) error {
-	return pb.WithFilerClient(streamingMode, pb.ServerAddress(*option.filerAddress), option.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	return pb.WithFilerClient(streamingMode, option.clientId, pb.ServerAddress(*option.filerAddress), option.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		return fn(client)
 	})
 }
@@ -43,6 +43,7 @@ type SyncOptions struct {
 	bFromTsMs       *int64
 	aProxyByFiler   *bool
 	bProxyByFiler   *bool
+	metricsHttpIp   *string
 	metricsHttpPort *int
 	concurrency     *int
 	clientId        int32
@@ -86,6 +87,7 @@ func init() {
 	syncOptions.concurrency = cmdFilerSynchronize.Flag.Int("concurrency", DefaultConcurrencyLimit, "The maximum number of files that will be synced concurrently.")
 	syncCpuProfile = cmdFilerSynchronize.Flag.String("cpuprofile", "", "cpu profile output file")
 	syncMemProfile = cmdFilerSynchronize.Flag.String("memprofile", "", "memory profile output file")
+	syncOptions.metricsHttpIp = cmdFilerSynchronize.Flag.String("metricsIp", "", "metrics listen ip")
 	syncOptions.metricsHttpPort = cmdFilerSynchronize.Flag.Int("metricsPort", 0, "metrics listen port")
 	syncOptions.clientId = util.RandomInt32()
 }
@@ -119,7 +121,7 @@ func runFilerSynchronize(cmd *Command, args []string) bool {
 	filerB := pb.ServerAddress(*syncOptions.filerB)

 	// start filer.sync metrics server
-	go statsCollect.StartMetricsServer(*syncOptions.metricsHttpPort)
+	go statsCollect.StartMetricsServer(*syncOptions.metricsHttpIp, *syncOptions.metricsHttpPort)

 	// read a filer signature
 	aFilerSignature, aFilerErr := replication.ReadFilerSignature(grpcDialOption, filerA)
@@ -302,7 +304,7 @@ func getSignaturePrefixByPath(path string) string {

 func getOffset(grpcDialOption grpc.DialOption, filer pb.ServerAddress, signaturePrefix string, signature int32) (lastOffsetTsNs int64, readErr error) {

-	readErr = pb.WithFilerClient(false, filer, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	readErr = pb.WithFilerClient(false, signature, filer, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		syncKey := []byte(signaturePrefix + "____")
 		util.Uint32toBytes(syncKey[len(signaturePrefix):len(signaturePrefix)+4], uint32(signature))

@@ -328,7 +330,7 @@ func getOffset(grpcDialOption grpc.DialOption, filer pb.ServerAddress, signature
 }

 func setOffset(grpcDialOption grpc.DialOption, filer pb.ServerAddress, signaturePrefix string, signature int32, offsetTsNs int64) error {
-	return pb.WithFilerClient(false, filer, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	return pb.WithFilerClient(false, signature, filer, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {

 		syncKey := []byte(signaturePrefix + "____")
 		util.Uint32toBytes(syncKey[len(signaturePrefix):len(signaturePrefix)+4], uint32(signature))
@@ -397,7 +399,11 @@ func genProcessFunction(sourcePath string, targetPath string, excludePaths []str
 				return nil
 			}
 			key := buildKey(dataSink, message, targetPath, sourceNewKey, sourcePath)
-			return dataSink.CreateEntry(key, message.NewEntry, message.Signatures)
+			if err := dataSink.CreateEntry(key, message.NewEntry, message.Signatures); err != nil {
+				return fmt.Errorf("create entry1 : %v", err)
+			} else {
+				return nil
+			}
 		}

 		// this is something special?
@@ -425,7 +431,11 @@ func genProcessFunction(sourcePath string, targetPath string, excludePaths []str
 				}
 				// create the new entry
 				newKey := buildKey(dataSink, message, targetPath, sourceNewKey, sourcePath)
-				return dataSink.CreateEntry(newKey, message.NewEntry, message.Signatures)
+				if err := dataSink.CreateEntry(newKey, message.NewEntry, message.Signatures); err != nil {
+					return fmt.Errorf("create entry2 : %v", err)
+				} else {
+					return nil
+				}

 			} else {
 				// new key is outside of the watched directory
@@ -439,7 +449,11 @@ func genProcessFunction(sourcePath string, targetPath string, excludePaths []str
 			if strings.HasPrefix(string(sourceNewKey), sourcePath) {
 				// new key is in the watched directory
 				key := buildKey(dataSink, message, targetPath, sourceNewKey, sourcePath)
-				return dataSink.CreateEntry(key, message.NewEntry, message.Signatures)
+				if err := dataSink.CreateEntry(key, message.NewEntry, message.Signatures); err != nil {
+					return fmt.Errorf("create entry3 : %v", err)
+				} else {
+					return nil
+				}
 			} else {
 				// new key is also outside of the watched directory
 				// skip
@@ -50,7 +50,7 @@ func (iamopt *IamOptions) startIamServer() bool {
 	util.LoadConfiguration("security", false)
 	grpcDialOption := security.LoadClientTLS(util.GetViper(), "grpc.client")
 	for {
-		err := pb.WithGrpcFilerClient(false, filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+		err := pb.WithGrpcFilerClient(false, 0, filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 			resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
 			if err != nil {
 				return fmt.Errorf("get filer %s configuration: %v", filerAddress, err)
@@ -119,7 +119,7 @@ func runMaster(cmd *Command, args []string) bool {
 		glog.Fatalf("volumeSizeLimitMB should be smaller than 30000")
 	}

-	go stats_collect.StartMetricsServer(*m.metricsHttpPort)
+	go stats_collect.StartMetricsServer(*m.ipBind, *m.metricsHttpPort)
 	startMaster(m, masterWhiteList)

 	return true
@@ -53,9 +53,9 @@ func init() {
 	mountOptions.diskType = cmdMount.Flag.String("disk", "", "[hdd|ssd|<tag>] hard drive or solid state drive or any tag")
 	mountOptions.ttlSec = cmdMount.Flag.Int("ttl", 0, "file ttl in seconds")
 	mountOptions.chunkSizeLimitMB = cmdMount.Flag.Int("chunkSizeLimitMB", 2, "local write buffer size, also chunk large files")
-	mountOptions.concurrentWriters = cmdMount.Flag.Int("concurrentWriters", 32, "limit concurrent goroutine writers if not 0")
+	mountOptions.concurrentWriters = cmdMount.Flag.Int("concurrentWriters", 32, "limit concurrent goroutine writers")
 	mountOptions.cacheDir = cmdMount.Flag.String("cacheDir", os.TempDir(), "local cache directory for file chunks and meta data")
-	mountOptions.cacheSizeMB = cmdMount.Flag.Int64("cacheCapacityMB", 0, "local file chunk cache capacity in MB")
+	mountOptions.cacheSizeMB = cmdMount.Flag.Int64("cacheCapacityMB", 0, "file chunk read cache capacity in MB")
 	mountOptions.dataCenter = cmdMount.Flag.String("dataCenter", "", "prefer to write to the data center")
 	mountOptions.allowOthers = cmdMount.Flag.Bool("allowOthers", true, "allows other users to access the file system")
 	mountOptions.umaskString = cmdMount.Flag.String("umask", "022", "octal umask, e.g., 022, 0111")
@@ -256,7 +256,8 @@ func RunMount(option *MountOptions, umask os.FileMode) bool {

 	seaweedFileSystem.StartBackgroundTasks()

-	fmt.Printf("This is SeaweedFS version %s %s %s\n", util.Version(), runtime.GOOS, runtime.GOARCH)
+	glog.V(0).Infof("mounted %s%s to %v", *option.filer, mountRoot, dir)
+	glog.V(0).Infof("This is SeaweedFS version %s %s %s", util.Version(), runtime.GOOS, runtime.GOARCH)

 	server.Serve()

@@ -144,7 +144,7 @@ func runS3(cmd *Command, args []string) bool {

 	util.LoadConfiguration("security", false)

-	go stats_collect.StartMetricsServer(*s3StandaloneOptions.metricsHttpPort)
+	go stats_collect.StartMetricsServer(*s3StandaloneOptions.bindIp, *s3StandaloneOptions.metricsHttpPort)

 	return s3StandaloneOptions.startS3Server()

@@ -163,7 +163,7 @@ func (s3opt *S3Options) startS3Server() bool {
 	var metricsIntervalSec int

 	for {
-		err := pb.WithGrpcFilerClient(false, filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+		err := pb.WithGrpcFilerClient(false, 0, filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 			resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
 			if err != nil {
 				return fmt.Errorf("get filer %s configuration: %v", filerAddress, err)
@@ -41,13 +41,13 @@ enabled = false
 dbFile = "./filer.db"                # sqlite db file

 [mysql]  # or memsql, tidb
-# CREATE TABLE IF NOT EXISTS filemeta (
-#   dirhash     BIGINT               COMMENT 'first 64 bits of MD5 hash value of directory field',
-#   name        VARCHAR(1000) BINARY COMMENT 'directory or file name',
-#   directory   TEXT BINARY          COMMENT 'full path to parent directory',
-#   meta        LONGBLOB,
-#   PRIMARY KEY (dirhash, name)
-# ) DEFAULT CHARSET=utf8;
+# CREATE TABLE IF NOT EXISTS `filemeta` (
+#   `dirhash`   BIGINT NOT NULL       COMMENT 'first 64 bits of MD5 hash value of directory field',
+#   `name`      VARCHAR(766) NOT NULL COMMENT 'directory or file name',
+#   `directory` TEXT NOT NULL         COMMENT 'full path to parent directory',
+#   `meta`      LONGBLOB,
+#   PRIMARY KEY (`dirhash`, `name`)
+# ) DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;

 enabled = false
 hostname = "localhost"
@@ -61,18 +61,18 @@ connection_max_lifetime_seconds = 0
 interpolateParams = false
 # if insert/upsert failing, you can disable upsert or update query syntax to match your RDBMS syntax:
 enableUpsert = true
-upsertQuery = """INSERT INTO `%s` (dirhash,name,directory,meta) VALUES(?,?,?,?) ON DUPLICATE KEY UPDATE meta = VALUES(meta)"""
+upsertQuery = """INSERT INTO `%s` (`dirhash`,`name`,`directory`,`meta`) VALUES (?,?,?,?) AS `new` ON DUPLICATE KEY UPDATE `meta` = `new`.`meta`"""

 [mysql2]  # or memsql, tidb
 enabled = false
 createTable = """
  CREATE TABLE IF NOT EXISTS `%s` (
-    dirhash BIGINT,
-    name VARCHAR(1000) BINARY,
-    directory TEXT BINARY,
-    meta LONGBLOB,
-    PRIMARY KEY (dirhash, name)
-  ) DEFAULT CHARSET=utf8;
+    `dirhash`   BIGINT NOT NULL,
+    `name`      VARCHAR(766) NOT NULL,
+    `directory` TEXT NOT NULL,
+    `meta`      LONGBLOB,
+    PRIMARY KEY (`dirhash`, `name`)
+  ) DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;
 """
 hostname = "localhost"
 port = 3306
@@ -85,7 +85,7 @@ connection_max_lifetime_seconds = 0
 interpolateParams = false
 # if insert/upsert failing, you can disable upsert or update query syntax to match your RDBMS syntax:
 enableUpsert = true
-upsertQuery = """INSERT INTO `%s` (dirhash,name,directory,meta) VALUES(?,?,?,?) ON DUPLICATE KEY UPDATE meta = VALUES(meta)"""
+upsertQuery = """INSERT INTO `%s` (`dirhash`,`name`,`directory`,`meta`) VALUES (?,?,?,?) AS `new` ON DUPLICATE KEY UPDATE `meta` = `new`.`meta`"""

 [postgres] # or cockroachdb, YugabyteDB
 # CREATE TABLE IF NOT EXISTS filemeta (
@@ -156,6 +156,7 @@ func init() {
 	webdavOptions.tlsCertificate = cmdServer.Flag.String("webdav.cert.file", "", "path to the TLS certificate file")
 	webdavOptions.cacheDir = cmdServer.Flag.String("webdav.cacheDir", os.TempDir(), "local cache directory for file chunks")
 	webdavOptions.cacheSizeMB = cmdServer.Flag.Int64("webdav.cacheCapacityMB", 0, "local cache capacity in MB")
+	webdavOptions.filerRootPath = cmdServer.Flag.String("webdav.filer.path", "/", "use this remote path from filer server")

 	mqBrokerOptions.port = cmdServer.Flag.Int("mq.broker.port", 17777, "message queue broker gRPC listen port")

@@ -233,7 +234,7 @@ func runServer(cmd *Command, args []string) bool {
 	webdavOptions.filer = &filerAddress
 	mqBrokerOptions.filerGroup = filerOptions.filerGroup

-	go stats_collect.StartMetricsServer(*serverMetricsHttpPort)
+	go stats_collect.StartMetricsServer(*serverBindIp, *serverMetricsHttpPort)

 	folders := strings.Split(*volumeDataFolders, ",")

@@ -130,7 +130,7 @@ func runVolume(cmd *Command, args []string) bool {
 		grace.SetupProfiling(*v.cpuProfile, *v.memProfile)
 	}

-	go stats_collect.StartMetricsServer(*v.metricsHttpPort)
+	go stats_collect.StartMetricsServer(*v.bindIp, *v.metricsHttpPort)

 	minFreeSpaces := util.MustParseMinFreeSpace(*minFreeSpace, *minFreeSpacePercent)
 	v.masters = pb.ServerAddresses(*v.mastersString).ToAddresses()
@@ -13,7 +13,7 @@ import (
 	"github.com/seaweedfs/seaweedfs/weed/pb"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
 	"github.com/seaweedfs/seaweedfs/weed/security"
-	"github.com/seaweedfs/seaweedfs/weed/server"
+	weed_server "github.com/seaweedfs/seaweedfs/weed/server"
 	"github.com/seaweedfs/seaweedfs/weed/util"
 )

@@ -23,6 +23,7 @@ var (

 type WebDavOption struct {
 	filer          *string
+	filerRootPath  *string
 	port           *int
 	collection     *string
 	replication    *string
@@ -44,6 +45,7 @@ func init() {
 	webDavStandaloneOptions.tlsCertificate = cmdWebDav.Flag.String("cert.file", "", "path to the TLS certificate file")
 	webDavStandaloneOptions.cacheDir = cmdWebDav.Flag.String("cacheDir", os.TempDir(), "local cache directory for file chunks")
 	webDavStandaloneOptions.cacheSizeMB = cmdWebDav.Flag.Int64("cacheCapacityMB", 0, "local cache capacity in MB")
+	webDavStandaloneOptions.filerRootPath = cmdWebDav.Flag.String("filer.path", "/", "use this remote path from filer server")
 }

 var cmdWebDav = &Command{
@@ -85,7 +87,7 @@ func (wo *WebDavOption) startWebDav() bool {
 	var cipher bool
 	// connect to filer
 	for {
-		err := pb.WithGrpcFilerClient(false, filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+		err := pb.WithGrpcFilerClient(false, 0, filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 			resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
 			if err != nil {
 				return fmt.Errorf("get filer %s configuration: %v", filerAddress, err)
@@ -104,6 +106,7 @@ func (wo *WebDavOption) startWebDav() bool {

 	ws, webdavServer_err := weed_server.NewWebDavServer(&weed_server.WebDavOption{
 		Filer:          filerAddress,
+		FilerRootPath:  *wo.filerRootPath,
 		GrpcDialOption: grpcDialOption,
 		Collection:     *wo.collection,
 		Replication:    *wo.replication,
@@ -158,7 +158,7 @@ func (store *AbstractSqlStore) InsertEntry(ctx context.Context, entry *filer.Ent
 		return fmt.Errorf("encode %s: %s", entry.FullPath, err)
 	}

-	if len(entry.Chunks) > filer.CountEntryChunksForGzip {
+	if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
 		meta = util.MaybeGzipData(meta)
 	}

@@ -157,7 +157,7 @@ func (store *ArangodbStore) InsertEntry(ctx context.Context, entry *filer.Entry)
 		return fmt.Errorf("encode %s: %s", entry.FullPath, err)
 	}

-	if len(entry.Chunks) > filer.CountEntryChunksForGzip {
+	if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
 		meta = util.MaybeGzipData(meta)
 	}
 	model := &Model{
@@ -196,7 +196,7 @@ func (store *ArangodbStore) UpdateEntry(ctx context.Context, entry *filer.Entry)
 		return fmt.Errorf("encode %s: %s", entry.FullPath, err)
 	}

-	if len(entry.Chunks) > filer.CountEntryChunksForGzip {
+	if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
 		meta = util.MaybeGzipData(meta)
 	}
 	model := &Model{
@@ -100,7 +100,7 @@ func (store *CassandraStore) InsertEntry(ctx context.Context, entry *filer.Entry
 		return fmt.Errorf("encode %s: %s", entry.FullPath, err)
 	}

-	if len(entry.Chunks) > filer.CountEntryChunksForGzip {
+	if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
 		meta = util.MaybeGzipData(meta)
 	}

@@ -33,7 +33,7 @@ func (f *Filer) LoadConfiguration(config *util.ViperProxy) (isFresh bool) {

 	if !hasDefaultStoreConfigured {
 		println()
-		println("Supported filer stores are:")
+		println("Supported filer stores are the following. If not found, check the full version.")
 		for _, store := range Stores {
 			println("    " + store.GetName())
 		}
@@ -46,7 +46,7 @@ type Entry struct {
 }

 func (entry *Entry) Size() uint64 {
-	return maxUint64(maxUint64(TotalSize(entry.Chunks), entry.FileSize), uint64(len(entry.Content)))
+	return maxUint64(maxUint64(TotalSize(entry.GetChunks()), entry.FileSize), uint64(len(entry.Content)))
 }

 func (entry *Entry) Timestamp() time.Time {
@@ -91,7 +91,7 @@ func (entry *Entry) ToExistingProtoEntry(message *filer_pb.Entry) {
 	}
 	message.IsDirectory = entry.IsDirectory()
 	message.Attributes = EntryAttributeToPb(entry)
-	message.Chunks = entry.Chunks
+	message.Chunks = entry.GetChunks()
 	message.Extended = entry.Extended
 	message.HardLinkId = entry.HardLinkId
 	message.HardLinkCounter = entry.HardLinkCounter
@@ -123,6 +123,10 @@ func (entry *Entry) ToProtoFullEntry() *filer_pb.FullEntry {
 	}
 }

+func (entry *Entry) GetChunks() []*filer_pb.FileChunk {
+	return entry.Chunks
+}
+
 func FromPbEntry(dir string, entry *filer_pb.Entry) *Entry {
 	t := &Entry{}
 	t.FullPath = util.NewFullPath(dir, entry.Name)
@@ -82,7 +82,7 @@ func (store *EtcdStore) InsertEntry(ctx context.Context, entry *filer.Entry) (er
 		return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err)
 	}

-	if len(entry.Chunks) > filer.CountEntryChunksForGzip {
+	if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
 		meta = weed_util.MaybeGzipData(meta)
 	}

@@ -0,0 +1,155 @@
+package filer
+
+import (
+	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
+	"github.com/seaweedfs/seaweedfs/weed/util/chunk_cache"
+	"github.com/seaweedfs/seaweedfs/weed/wdclient"
+	"sync"
+)
+
+type ChunkGroup struct {
+	lookupFn     wdclient.LookupFileIdFunctionType
+	chunkCache   chunk_cache.ChunkCache
+	sections     map[SectionIndex]*FileChunkSection
+	sectionsLock sync.RWMutex
+	readerCache  *ReaderCache
+}
+
+func NewChunkGroup(lookupFn wdclient.LookupFileIdFunctionType, chunkCache chunk_cache.ChunkCache, chunks []*filer_pb.FileChunk) (*ChunkGroup, error) {
+	group := &ChunkGroup{
+		lookupFn:    lookupFn,
+		chunkCache:  chunkCache,
+		sections:    make(map[SectionIndex]*FileChunkSection),
+		readerCache: NewReaderCache(32, chunkCache, lookupFn),
+	}
+
+	err := group.SetChunks(chunks)
+	return group, err
+}
+
+func (group *ChunkGroup) AddChunk(chunk *filer_pb.FileChunk) error {
+
+	group.sectionsLock.Lock()
+	defer group.sectionsLock.Unlock()
+
+	sectionIndexStart, sectionIndexStop := SectionIndex(chunk.Offset/SectionSize), SectionIndex((chunk.Offset+int64(chunk.Size))/SectionSize)
+	for si := sectionIndexStart; si < sectionIndexStop+1; si++ {
+		section, found := group.sections[si]
+		if !found {
+			section = NewFileChunkSection(si)
+			group.sections[si] = section
+		}
+		section.addChunk(chunk)
+	}
+	return nil
+}
+
+func (group *ChunkGroup) ReadDataAt(fileSize int64, buff []byte, offset int64) (n int, tsNs int64, err error) {
+
+	group.sectionsLock.RLock()
+	defer group.sectionsLock.RUnlock()
+
+	sectionIndexStart, sectionIndexStop := SectionIndex(offset/SectionSize), SectionIndex((offset+int64(len(buff)))/SectionSize)
+	for si := sectionIndexStart; si < sectionIndexStop+1; si++ {
+		section, found := group.sections[si]
+		rangeStart, rangeStop := max(offset, int64(si*SectionSize)), min(offset+int64(len(buff)), int64((si+1)*SectionSize))
+		if !found {
+			for i := rangeStart; i < rangeStop; i++ {
+				buff[i-offset] = 0
+			}
+			continue
+		}
+		xn, xTsNs, xErr := section.readDataAt(group, fileSize, buff[rangeStart-offset:rangeStop-offset], rangeStart)
+		if xErr != nil {
+			err = xErr
+		}
+		n += xn
+		tsNs = max(tsNs, xTsNs)
+	}
+	return
+}
+
+func (group *ChunkGroup) SetChunks(chunks []*filer_pb.FileChunk) error {
+	group.sectionsLock.RLock()
+	defer group.sectionsLock.RUnlock()
+
+	var dataChunks []*filer_pb.FileChunk
+	for _, chunk := range chunks {
+
+		if !chunk.IsChunkManifest {
+			dataChunks = append(dataChunks, chunk)
+			continue
+		}
+
+		resolvedChunks, err := ResolveOneChunkManifest(group.lookupFn, chunk)
+		if err != nil {
+			return err
+		}
+
+		dataChunks = append(dataChunks, resolvedChunks...)
+	}
+
+	sections := make(map[SectionIndex]*FileChunkSection)
+
+	for _, chunk := range dataChunks {
+		sectionIndexStart, sectionIndexStop := SectionIndex(chunk.Offset/SectionSize), SectionIndex((chunk.Offset+int64(chunk.Size))/SectionSize)
+		for si := sectionIndexStart; si < sectionIndexStop+1; si++ {
+			section, found := sections[si]
+			if !found {
+				section = NewFileChunkSection(si)
+				sections[si] = section
+			}
+			section.chunks = append(section.chunks, chunk)
+		}
+	}
+
+	group.sections = sections
+	return nil
+}
+
+const (
+	// see weedfs_file_lseek.go
+	SEEK_DATA uint32 = 3 // seek to next data after the offset
+	// SEEK_HOLE uint32 = 4 // seek to next hole after the offset
+)
+
+// FIXME: needa tests
+func (group *ChunkGroup) SearchChunks(offset, fileSize int64, whence uint32) (found bool, out int64) {
+	group.sectionsLock.RLock()
+	defer group.sectionsLock.RUnlock()
+
+	return group.doSearchChunks(offset, fileSize, whence)
+}
+
+func (group *ChunkGroup) doSearchChunks(offset, fileSize int64, whence uint32) (found bool, out int64) {
+
+	sectionIndex, maxSectionIndex := SectionIndex(offset/SectionSize), SectionIndex(fileSize/SectionSize)
+	if whence == SEEK_DATA {
+		for si := sectionIndex; si < maxSectionIndex+1; si++ {
+			section, foundSection := group.sections[si]
+			if !foundSection {
+				continue
+			}
+			sectionStart := section.DataStartOffset(group, offset, fileSize)
+			if sectionStart == -1 {
+				continue
+			}
+			return true, sectionStart
+		}
+		return false, 0
+	} else {
+		// whence == SEEK_HOLE
+		for si := sectionIndex; si < maxSectionIndex; si++ {
+			section, foundSection := group.sections[si]
+			if !foundSection {
+				return true, offset
+			}
+			holeStart := section.NextStopOffset(group, offset, fileSize)
+			if holeStart%SectionSize == 0 {
+				continue
+			}
+			return true, holeStart
+		}
+		return true, fileSize
+	}
+}
@@ -0,0 +1,36 @@
+package filer
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestChunkGroup_doSearchChunks(t *testing.T) {
+	type fields struct {
+		sections map[SectionIndex]*FileChunkSection
+	}
+	type args struct {
+		offset   int64
+		fileSize int64
+		whence   uint32
+	}
+	tests := []struct {
+		name      string
+		fields    fields
+		args      args
+		wantFound bool
+		wantOut   int64
+	}{
+		// TODO: Add test cases.
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			group := &ChunkGroup{
+				sections: tt.fields.sections,
+			}
+			gotFound, gotOut := group.doSearchChunks(tt.args.offset, tt.args.fileSize, tt.args.whence)
+			assert.Equalf(t, tt.wantFound, gotFound, "doSearchChunks(%v, %v, %v)", tt.args.offset, tt.args.fileSize, tt.args.whence)
+			assert.Equalf(t, tt.wantOut, gotOut, "doSearchChunks(%v, %v, %v)", tt.args.offset, tt.args.fileSize, tt.args.whence)
+		})
+	}
+}
@@ -264,7 +264,7 @@ func mergeIntoManifest(saveFunc SaveDataAsChunkFunctionType, dataChunks []*filer
 		}
 	}

-	manifestChunk, err = saveFunc(bytes.NewReader(data), "", 0)
+	manifestChunk, err = saveFunc(bytes.NewReader(data), "", 0, 0)
 	if err != nil {
 		return nil, err
 	}
@@ -275,4 +275,4 @@ func mergeIntoManifest(saveFunc SaveDataAsChunkFunctionType, dataChunks []*filer
 	return
 }

-type SaveDataAsChunkFunctionType func(reader io.Reader, name string, offset int64) (chunk *filer_pb.FileChunk, err error)
+type SaveDataAsChunkFunctionType func(reader io.Reader, name string, offset int64, tsNs int64) (chunk *filer_pb.FileChunk, err error)
@@ -0,0 +1,134 @@
+package filer
+
+import (
+	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
+	"sync"
+)
+
+const SectionSize = 2 * 1024 * 1024 * 32 // 64MiB
+type SectionIndex int64
+type FileChunkSection struct {
+	sectionIndex     SectionIndex
+	chunks           []*filer_pb.FileChunk
+	visibleIntervals *IntervalList[*VisibleInterval]
+	chunkViews       *IntervalList[*ChunkView]
+	reader           *ChunkReadAt
+	lock             sync.Mutex
+}
+
+func NewFileChunkSection(si SectionIndex) *FileChunkSection {
+	return &FileChunkSection{
+		sectionIndex: si,
+	}
+}
+
+func (section *FileChunkSection) addChunk(chunk *filer_pb.FileChunk) error {
+	section.lock.Lock()
+	defer section.lock.Unlock()
+
+	start, stop := max(int64(section.sectionIndex)*SectionSize, chunk.Offset), min(((int64(section.sectionIndex)+1)*SectionSize), chunk.Offset+int64(chunk.Size))
+
+	section.chunks = append(section.chunks, chunk)
+
+	if section.visibleIntervals == nil {
+		section.visibleIntervals = readResolvedChunks(section.chunks, int64(section.sectionIndex)*SectionSize, (int64(section.sectionIndex)+1)*SectionSize)
+	} else {
+		MergeIntoVisibles(section.visibleIntervals, start, stop, chunk)
+		garbageFileIds := FindGarbageChunks(section.visibleIntervals, start, stop)
+		removeGarbageChunks(section, garbageFileIds)
+	}
+
+	if section.chunkViews != nil {
+		MergeIntoChunkViews(section.chunkViews, start, stop, chunk)
+	}
+
+	return nil
+}
+
+func removeGarbageChunks(section *FileChunkSection, garbageFileIds map[string]struct{}) {
+	for i := 0; i < len(section.chunks); {
+		t := section.chunks[i]
+		length := len(section.chunks)
+		if _, found := garbageFileIds[t.FileId]; found {
+			if i < length-1 {
+				section.chunks[i] = section.chunks[length-1]
+			}
+			section.chunks = section.chunks[:length-1]
+		} else {
+			i++
+		}
+	}
+}
+
+func (section *FileChunkSection) setupForRead(group *ChunkGroup, fileSize int64) {
+	if section.visibleIntervals == nil {
+		section.visibleIntervals = readResolvedChunks(section.chunks, int64(section.sectionIndex)*SectionSize, (int64(section.sectionIndex)+1)*SectionSize)
+		section.chunks, _ = SeparateGarbageChunks(section.visibleIntervals, section.chunks)
+		if section.reader != nil {
+			_ = section.reader.Close()
+			section.reader = nil
+		}
+	}
+	if section.chunkViews == nil {
+		section.chunkViews = ViewFromVisibleIntervals(section.visibleIntervals, int64(section.sectionIndex)*SectionSize, (int64(section.sectionIndex)+1)*SectionSize)
+	}
+
+	if section.reader == nil {
+		section.reader = NewChunkReaderAtFromClient(group.readerCache, section.chunkViews, min(int64(section.sectionIndex+1)*SectionSize, fileSize))
+	}
+	section.reader.fileSize = fileSize
+}
+
+func (section *FileChunkSection) readDataAt(group *ChunkGroup, fileSize int64, buff []byte, offset int64) (n int, tsNs int64, err error) {
+	section.lock.Lock()
+	defer section.lock.Unlock()
+
+	section.setupForRead(group, fileSize)
+
+	return section.reader.ReadAtWithTime(buff, offset)
+}
+
+func (section *FileChunkSection) DataStartOffset(group *ChunkGroup, offset int64, fileSize int64) int64 {
+	section.lock.Lock()
+	defer section.lock.Unlock()
+
+	section.setupForRead(group, fileSize)
+
+	for x := section.visibleIntervals.Front(); x != nil; x = x.Next {
+		visible := x.Value
+		if visible.stop <= offset {
+			continue
+		}
+		if offset < visible.start {
+			return offset
+		}
+		return offset
+	}
+	return -1
+}
+
+func (section *FileChunkSection) NextStopOffset(group *ChunkGroup, offset int64, fileSize int64) int64 {
+	section.lock.Lock()
+	defer section.lock.Unlock()
+
+	section.setupForRead(group, fileSize)
+
+	isAfterOffset := false
+	for x := section.visibleIntervals.Front(); x != nil; x = x.Next {
+		visible := x.Value
+		if !isAfterOffset {
+			if visible.stop <= offset {
+				continue
+			}
+			isAfterOffset = true
+		}
+		if offset < visible.start {
+			return offset
+		}
+		// now visible.start <= offset
+		if offset < visible.stop {
+			offset = visible.stop
+		}
+	}
+	return offset
+}
@@ -0,0 +1,48 @@
+package filer
+
+import (
+	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
+	"testing"
+)
+
+func Test_removeGarbageChunks(t *testing.T) {
+	section := NewFileChunkSection(0)
+	section.chunks = append(section.chunks, &filer_pb.FileChunk{
+		FileId:       "0",
+		Offset:       0,
+		Size:         1,
+		ModifiedTsNs: 0,
+	})
+	section.chunks = append(section.chunks, &filer_pb.FileChunk{
+		FileId:       "1",
+		Offset:       1,
+		Size:         1,
+		ModifiedTsNs: 1,
+	})
+	section.chunks = append(section.chunks, &filer_pb.FileChunk{
+		FileId:       "2",
+		Offset:       2,
+		Size:         1,
+		ModifiedTsNs: 2,
+	})
+	section.chunks = append(section.chunks, &filer_pb.FileChunk{
+		FileId:       "3",
+		Offset:       3,
+		Size:         1,
+		ModifiedTsNs: 3,
+	})
+	section.chunks = append(section.chunks, &filer_pb.FileChunk{
+		FileId:       "4",
+		Offset:       4,
+		Size:         1,
+		ModifiedTsNs: 4,
+	})
+	garbageFileIds := make(map[string]struct{})
+	garbageFileIds["0"] = struct{}{}
+	garbageFileIds["2"] = struct{}{}
+	garbageFileIds["4"] = struct{}{}
+	removeGarbageChunks(section, garbageFileIds)
+	if len(section.chunks) != 2 {
+		t.Errorf("remove chunk 2 failed")
+	}
+}
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"fmt"
 	"github.com/seaweedfs/seaweedfs/weed/wdclient"
-	"golang.org/x/exp/slices"
 	"math"

 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
@@ -31,19 +30,22 @@ func FileSize(entry *filer_pb.Entry) (size uint64) {
 			fileSize = maxUint64(fileSize, uint64(entry.RemoteEntry.RemoteSize))
 		}
 	}
-	return maxUint64(TotalSize(entry.Chunks), fileSize)
+	return maxUint64(TotalSize(entry.GetChunks()), fileSize)
 }

 func ETag(entry *filer_pb.Entry) (etag string) {
 	if entry.Attributes == nil || entry.Attributes.Md5 == nil {
-		return ETagChunks(entry.Chunks)
+		return ETagChunks(entry.GetChunks())
 	}
 	return fmt.Sprintf("%x", entry.Attributes.Md5)
 }

 func ETagEntry(entry *Entry) (etag string) {
+	if entry.IsInRemoteOnly() {
+		return entry.Remote.RemoteETag
+	}
 	if entry.Attr.Md5 == nil {
-		return ETagChunks(entry.Chunks)
+		return ETagChunks(entry.GetChunks())
 	}
 	return fmt.Sprintf("%x", entry.Attr.Md5)
 }
@@ -63,8 +65,15 @@ func CompactFileChunks(lookupFileIdFn wdclient.LookupFileIdFunctionType, chunks

 	visibles, _ := NonOverlappingVisibleIntervals(lookupFileIdFn, chunks, 0, math.MaxInt64)

+	compacted, garbage = SeparateGarbageChunks(visibles, chunks)
+
+	return
+}
+
+func SeparateGarbageChunks(visibles *IntervalList[*VisibleInterval], chunks []*filer_pb.FileChunk) (compacted []*filer_pb.FileChunk, garbage []*filer_pb.FileChunk) {
 	fileIds := make(map[string]bool)
-	for _, interval := range visibles {
+	for x := visibles.Front(); x != nil; x = x.Next {
+		interval := x.Value
 		fileIds[interval.fileId] = true
 	}
 	for _, chunk := range chunks {
@@ -74,7 +83,18 @@ func CompactFileChunks(lookupFileIdFn wdclient.LookupFileIdFunctionType, chunks
 			garbage = append(garbage, chunk)
 		}
 	}
+	return compacted, garbage
+}

+func FindGarbageChunks(visibles *IntervalList[*VisibleInterval], start int64, stop int64) (garbageFileIds map[string]struct{}) {
+	garbageFileIds = make(map[string]struct{})
+	for x := visibles.Front(); x != nil; x = x.Next {
+		interval := x.Value
+		offset := interval.start - interval.offsetInChunk
+		if start <= offset && offset+int64(interval.chunkSize) <= stop {
+			garbageFileIds[interval.fileId] = struct{}{}
+		}
+	}
 	return
 }

@@ -128,20 +148,39 @@ func DoMinusChunksBySourceFileId(as, bs []*filer_pb.FileChunk) (delta []*filer_p
 }

 type ChunkView struct {
-	FileId      string
-	Offset      int64
-	Size        uint64
-	LogicOffset int64 // actual offset in the file, for the data specified via [offset, offset+size) in current chunk
-	ChunkSize   uint64
-	CipherKey   []byte
-	IsGzipped   bool
+	FileId        string
+	OffsetInChunk int64 // offset within the chunk
+	ViewSize      uint64
+	ViewOffset    int64 // actual offset in the file, for the data specified via [offset, offset+size) in current chunk
+	ChunkSize     uint64
+	CipherKey     []byte
+	IsGzipped     bool
+	ModifiedTsNs  int64
+}
+
+func (cv *ChunkView) SetStartStop(start, stop int64) {
+	cv.OffsetInChunk += start - cv.ViewOffset
+	cv.ViewOffset = start
+	cv.ViewSize = uint64(stop - start)
+}
+func (cv *ChunkView) Clone() IntervalValue {
+	return &ChunkView{
+		FileId:        cv.FileId,
+		OffsetInChunk: cv.OffsetInChunk,
+		ViewSize:      cv.ViewSize,
+		ViewOffset:    cv.ViewOffset,
+		ChunkSize:     cv.ChunkSize,
+		CipherKey:     cv.CipherKey,
+		IsGzipped:     cv.IsGzipped,
+		ModifiedTsNs:  cv.ModifiedTsNs,
+	}
 }

 func (cv *ChunkView) IsFullChunk() bool {
-	return cv.Size == cv.ChunkSize
+	return cv.ViewSize == cv.ChunkSize
 }

-func ViewFromChunks(lookupFileIdFn wdclient.LookupFileIdFunctionType, chunks []*filer_pb.FileChunk, offset int64, size int64) (views []*ChunkView) {
+func ViewFromChunks(lookupFileIdFn wdclient.LookupFileIdFunctionType, chunks []*filer_pb.FileChunk, offset int64, size int64) (chunkViews *IntervalList[*ChunkView]) {

 	visibles, _ := NonOverlappingVisibleIntervals(lookupFileIdFn, chunks, offset, offset+size)

@@ -149,7 +188,7 @@ func ViewFromChunks(lookupFileIdFn wdclient.LookupFileIdFunctionType, chunks []*

 }

-func ViewFromVisibleIntervals(visibles []VisibleInterval, offset int64, size int64) (views []*ChunkView) {
+func ViewFromVisibleIntervals(visibles *IntervalList[*VisibleInterval], offset int64, size int64) (chunkViews *IntervalList[*ChunkView]) {

 	stop := offset + size
 	if size == math.MaxInt64 {
@@ -159,164 +198,112 @@ func ViewFromVisibleIntervals(visibles []VisibleInterval, offset int64, size int
 		stop = math.MaxInt64
 	}

-	for _, chunk := range visibles {
+	chunkViews = NewIntervalList[*ChunkView]()
+	for x := visibles.Front(); x != nil; x = x.Next {
+		chunk := x.Value

 		chunkStart, chunkStop := max(offset, chunk.start), min(stop, chunk.stop)

 		if chunkStart < chunkStop {
-			views = append(views, &ChunkView{
-				FileId:      chunk.fileId,
-				Offset:      chunkStart - chunk.start + chunk.chunkOffset,
-				Size:        uint64(chunkStop - chunkStart),
-				LogicOffset: chunkStart,
-				ChunkSize:   chunk.chunkSize,
-				CipherKey:   chunk.cipherKey,
-				IsGzipped:   chunk.isGzipped,
+			chunkView := &ChunkView{
+				FileId:        chunk.fileId,
+				OffsetInChunk: chunkStart - chunk.start + chunk.offsetInChunk,
+				ViewSize:      uint64(chunkStop - chunkStart),
+				ViewOffset:    chunkStart,
+				ChunkSize:     chunk.chunkSize,
+				CipherKey:     chunk.cipherKey,
+				IsGzipped:     chunk.isGzipped,
+				ModifiedTsNs:  chunk.modifiedTsNs,
+			}
+			chunkViews.AppendInterval(&Interval[*ChunkView]{
+				StartOffset: chunkStart,
+				StopOffset:  chunkStop,
+				TsNs:        chunk.modifiedTsNs,
+				Value:       chunkView,
+				Prev:        nil,
+				Next:        nil,
 			})
 		}
 	}

-	return views
+	return chunkViews

 }

-func logPrintf(name string, visibles []VisibleInterval) {
+func MergeIntoVisibles(visibles *IntervalList[*VisibleInterval], start int64, stop int64, chunk *filer_pb.FileChunk) {

-	/*
-		glog.V(0).Infof("%s len %d", name, len(visibles))
-		for _, v := range visibles {
-			glog.V(0).Infof("%s:  [%d,%d) %s %d", name, v.start, v.stop, v.fileId, v.chunkOffset)
-		}
-	*/
+	newV := &VisibleInterval{
+		start:         start,
+		stop:          stop,
+		fileId:        chunk.GetFileIdString(),
+		modifiedTsNs:  chunk.ModifiedTsNs,
+		offsetInChunk: start - chunk.Offset, // the starting position in the chunk
+		chunkSize:     chunk.Size,           // size of the chunk
+		cipherKey:     chunk.CipherKey,
+		isGzipped:     chunk.IsCompressed,
+	}
+
+	visibles.InsertInterval(start, stop, chunk.ModifiedTsNs, newV)
 }

-func MergeIntoVisibles(visibles []VisibleInterval, chunk *filer_pb.FileChunk) (newVisibles []VisibleInterval) {
+func MergeIntoChunkViews(chunkViews *IntervalList[*ChunkView], start int64, stop int64, chunk *filer_pb.FileChunk) {

-	newV := newVisibleInterval(chunk.Offset, chunk.Offset+int64(chunk.Size), chunk.GetFileIdString(), chunk.ModifiedTsNs, 0, chunk.Size, chunk.CipherKey, chunk.IsCompressed)
-
-	length := len(visibles)
-	if length == 0 {
-		return append(visibles, newV)
-	}
-	last := visibles[length-1]
-	if last.stop <= chunk.Offset {
-		return append(visibles, newV)
+	chunkView := &ChunkView{
+		FileId:        chunk.GetFileIdString(),
+		OffsetInChunk: start - chunk.Offset,
+		ViewSize:      uint64(stop - start),
+		ViewOffset:    start,
+		ChunkSize:     chunk.Size,
+		CipherKey:     chunk.CipherKey,
+		IsGzipped:     chunk.IsCompressed,
+		ModifiedTsNs:  chunk.ModifiedTsNs,
 	}

-	logPrintf("  before", visibles)
-	// glog.V(0).Infof("newVisibles %d adding chunk [%d,%d) %s size:%d", len(newVisibles), chunk.Offset, chunk.Offset+int64(chunk.Size), chunk.GetFileIdString(), chunk.Size)
-	chunkStop := chunk.Offset + int64(chunk.Size)
-	for _, v := range visibles {
-		if v.start < chunk.Offset && chunk.Offset < v.stop {
-			t := newVisibleInterval(v.start, chunk.Offset, v.fileId, v.modifiedTsNs, v.chunkOffset, v.chunkSize, v.cipherKey, v.isGzipped)
-			newVisibles = append(newVisibles, t)
-			// glog.V(0).Infof("visible %d [%d,%d) =1> [%d,%d)", i, v.start, v.stop, t.start, t.stop)
-		}
-		if v.start < chunkStop && chunkStop < v.stop {
-			t := newVisibleInterval(chunkStop, v.stop, v.fileId, v.modifiedTsNs, v.chunkOffset+(chunkStop-v.start), v.chunkSize, v.cipherKey, v.isGzipped)
-			newVisibles = append(newVisibles, t)
-			// glog.V(0).Infof("visible %d [%d,%d) =2> [%d,%d)", i, v.start, v.stop, t.start, t.stop)
-		}
-		if chunkStop <= v.start || v.stop <= chunk.Offset {
-			newVisibles = append(newVisibles, v)
-			// glog.V(0).Infof("visible %d [%d,%d) =3> [%d,%d)", i, v.start, v.stop, v.start, v.stop)
-		}
-	}
-	newVisibles = append(newVisibles, newV)
-
-	logPrintf("  append", newVisibles)
-
-	for i := len(newVisibles) - 1; i >= 0; i-- {
-		if i > 0 && newV.start < newVisibles[i-1].start {
-			newVisibles[i] = newVisibles[i-1]
-		} else {
-			newVisibles[i] = newV
-			break
-		}
-	}
-	logPrintf("  sorted", newVisibles)
-
-	return newVisibles
+	chunkViews.InsertInterval(start, stop, chunk.ModifiedTsNs, chunkView)
 }

 // NonOverlappingVisibleIntervals translates the file chunk into VisibleInterval in memory
 // If the file chunk content is a chunk manifest
-func NonOverlappingVisibleIntervals(lookupFileIdFn wdclient.LookupFileIdFunctionType, chunks []*filer_pb.FileChunk, startOffset int64, stopOffset int64) (visibles []VisibleInterval, err error) {
+func NonOverlappingVisibleIntervals(lookupFileIdFn wdclient.LookupFileIdFunctionType, chunks []*filer_pb.FileChunk, startOffset int64, stopOffset int64) (visibles *IntervalList[*VisibleInterval], err error) {

 	chunks, _, err = ResolveChunkManifest(lookupFileIdFn, chunks, startOffset, stopOffset)
 	if err != nil {
 		return
 	}

-	visibles2 := readResolvedChunks(chunks)
+	visibles2 := readResolvedChunks(chunks, 0, math.MaxInt64)

-	if true {
-		return visibles2, err
-	}
-	slices.SortFunc(chunks, func(a, b *filer_pb.FileChunk) bool {
-		if a.ModifiedTsNs == b.ModifiedTsNs {
-			filer_pb.EnsureFid(a)
-			filer_pb.EnsureFid(b)
-			if a.Fid == nil || b.Fid == nil {
-				return true
-			}
-			return a.Fid.FileKey < b.Fid.FileKey
-		}
-		return a.ModifiedTsNs < b.ModifiedTsNs
-	})
-	for _, chunk := range chunks {
-
-		// glog.V(0).Infof("merge [%d,%d)", chunk.Offset, chunk.Offset+int64(chunk.Size))
-		visibles = MergeIntoVisibles(visibles, chunk)
-
-		logPrintf("add", visibles)
-
-	}
-
-	if len(visibles) != len(visibles2) {
-		fmt.Printf("different visibles size %d : %d\n", len(visibles), len(visibles2))
-	} else {
-		for i := 0; i < len(visibles); i++ {
-			checkDifference(visibles[i], visibles2[i])
-		}
-	}
-
-	return
-}
-
-func checkDifference(x, y VisibleInterval) {
-	if x.start != y.start ||
-		x.stop != y.stop ||
-		x.fileId != y.fileId ||
-		x.modifiedTsNs != y.modifiedTsNs {
-		fmt.Printf("different visible %+v : %+v\n", x, y)
-	}
+	return visibles2, err
 }

 // find non-overlapping visible intervals
 // visible interval map to one file chunk

 type VisibleInterval struct {
-	start        int64
-	stop         int64
-	modifiedTsNs int64
-	fileId       string
-	chunkOffset  int64
-	chunkSize    uint64
-	cipherKey    []byte
-	isGzipped    bool
+	start         int64
+	stop          int64
+	modifiedTsNs  int64
+	fileId        string
+	offsetInChunk int64
+	chunkSize     uint64
+	cipherKey     []byte
+	isGzipped     bool
 }

-func newVisibleInterval(start, stop int64, fileId string, modifiedTime int64, chunkOffset int64, chunkSize uint64, cipherKey []byte, isGzipped bool) VisibleInterval {
-	return VisibleInterval{
-		start:        start,
-		stop:         stop,
-		fileId:       fileId,
-		modifiedTsNs: modifiedTime,
-		chunkOffset:  chunkOffset, // the starting position in the chunk
-		chunkSize:    chunkSize,
-		cipherKey:    cipherKey,
-		isGzipped:    isGzipped,
+func (v *VisibleInterval) SetStartStop(start, stop int64) {
+	v.offsetInChunk += start - v.start
+	v.start, v.stop = start, stop
+}
+func (v *VisibleInterval) Clone() IntervalValue {
+	return &VisibleInterval{
+		start:         v.start,
+		stop:          v.stop,
+		modifiedTsNs:  v.modifiedTsNs,
+		fileId:        v.fileId,
+		offsetInChunk: v.offsetInChunk,
+		chunkSize:     v.chunkSize,
+		cipherKey:     v.cipherKey,
+		isGzipped:     v.isGzipped,
 	}
 }

@@ -1,14 +1,22 @@
 package filer

 import (
+	"container/list"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
 	"golang.org/x/exp/slices"
 )

-func readResolvedChunks(chunks []*filer_pb.FileChunk) (visibles []VisibleInterval) {
+func readResolvedChunks(chunks []*filer_pb.FileChunk, startOffset int64, stopOffset int64) (visibles *IntervalList[*VisibleInterval]) {

 	var points []*Point
 	for _, chunk := range chunks {
+		if chunk.IsChunkManifest {
+			println("This should not happen! A manifest chunk found:", chunk.GetFileIdString())
+		}
+		start, stop := max(chunk.Offset, startOffset), min(chunk.Offset+int64(chunk.Size), stopOffset)
+		if start >= stop {
+			continue
+		}
 		points = append(points, &Point{
 			x:       chunk.Offset,
 			ts:      chunk.ModifiedTsNs,
@@ -33,40 +41,45 @@ func readResolvedChunks(chunks []*filer_pb.FileChunk) (visibles []VisibleInterva
 	})

 	var prevX int64
-	var queue []*Point
+	queue := list.New() // points with higher ts are at the tail
+	visibles = NewIntervalList[*VisibleInterval]()
+	var prevPoint *Point
 	for _, point := range points {
+		if queue.Len() > 0 {
+			prevPoint = queue.Back().Value.(*Point)
+		} else {
+			prevPoint = nil
+		}
 		if point.isStart {
-			if len(queue) > 0 {
-				lastIndex := len(queue) - 1
-				lastPoint := queue[lastIndex]
-				if point.x != prevX && lastPoint.ts < point.ts {
-					visibles = addToVisibles(visibles, prevX, lastPoint, point)
+			if prevPoint != nil {
+				if point.x != prevX && prevPoint.ts < point.ts {
+					addToVisibles(visibles, prevX, prevPoint, point)
 					prevX = point.x
 				}
 			}
 			// insert into queue
-			for i := len(queue); i >= 0; i-- {
-				if i == 0 || queue[i-1].ts <= point.ts {
-					if i == len(queue) {
-						prevX = point.x
+			if prevPoint == nil || prevPoint.ts < point.ts {
+				queue.PushBack(point)
+				prevX = point.x
+			} else {
+				for e := queue.Front(); e != nil; e = e.Next() {
+					if e.Value.(*Point).ts > point.ts {
+						queue.InsertBefore(point, e)
+						break
 					}
-					queue = addToQueue(queue, i, point)
-					break
 				}
 			}
 		} else {
-			lastIndex := len(queue) - 1
-			index := lastIndex
-			var startPoint *Point
-			for ; index >= 0; index-- {
-				startPoint = queue[index]
-				if startPoint.ts == point.ts {
-					queue = removeFromQueue(queue, index)
+			isLast := true
+			for e := queue.Back(); e != nil; e = e.Prev() {
+				if e.Value.(*Point).ts == point.ts {
+					queue.Remove(e)
 					break
 				}
+				isLast = false
 			}
-			if index == lastIndex && startPoint != nil {
-				visibles = addToVisibles(visibles, prevX, startPoint, point)
+			if isLast && prevPoint != nil {
+				addToVisibles(visibles, prevX, prevPoint, point)
 				prevX = point.x
 			}
 		}
@@ -75,37 +88,30 @@ func readResolvedChunks(chunks []*filer_pb.FileChunk) (visibles []VisibleInterva
 	return
 }

-func removeFromQueue(queue []*Point, index int) []*Point {
-	for i := index; i < len(queue)-1; i++ {
-		queue[i] = queue[i+1]
-	}
-	queue = queue[:len(queue)-1]
-	return queue
-}
-
-func addToQueue(queue []*Point, index int, point *Point) []*Point {
-	queue = append(queue, point)
-	for i := len(queue) - 1; i > index; i-- {
-		queue[i], queue[i-1] = queue[i-1], queue[i]
-	}
-	return queue
-}
-
-func addToVisibles(visibles []VisibleInterval, prevX int64, startPoint *Point, point *Point) []VisibleInterval {
+func addToVisibles(visibles *IntervalList[*VisibleInterval], prevX int64, startPoint *Point, point *Point) {
 	if prevX < point.x {
 		chunk := startPoint.chunk
-		visibles = append(visibles, VisibleInterval{
-			start:        prevX,
-			stop:         point.x,
-			fileId:       chunk.GetFileIdString(),
-			modifiedTsNs: chunk.ModifiedTsNs,
-			chunkOffset:  prevX - chunk.Offset,
-			chunkSize:    chunk.Size,
-			cipherKey:    chunk.CipherKey,
-			isGzipped:    chunk.IsCompressed,
-		})
+		visible := &VisibleInterval{
+			start:         prevX,
+			stop:          point.x,
+			fileId:        chunk.GetFileIdString(),
+			modifiedTsNs:  chunk.ModifiedTsNs,
+			offsetInChunk: prevX - chunk.Offset,
+			chunkSize:     chunk.Size,
+			cipherKey:     chunk.CipherKey,
+			isGzipped:     chunk.IsCompressed,
+		}
+		appendVisibleInterfal(visibles, visible)
 	}
-	return visibles
+}
+
+func appendVisibleInterfal(visibles *IntervalList[*VisibleInterval], visible *VisibleInterval) {
+	visibles.AppendInterval(&Interval[*VisibleInterval]{
+		StartOffset: visible.start,
+		StopOffset:  visible.stop,
+		TsNs:        visible.modifiedTsNs,
+		Value:       visible,
+	})
 }

 type Point struct {
@@ -3,6 +3,7 @@ package filer
 import (
 	"fmt"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
+	"math"
 	"math/rand"
 	"testing"
 )
@@ -42,9 +43,38 @@ func TestReadResolvedChunks(t *testing.T) {
 		},
 	}

-	visibles := readResolvedChunks(chunks)
+	visibles := readResolvedChunks(chunks, 0, math.MaxInt64)

-	for _, visible := range visibles {
+	fmt.Printf("resolved to %d visible intervales\n", visibles.Len())
+	for x := visibles.Front(); x != nil; x = x.Next {
+		visible := x.Value
+		fmt.Printf("[%d,%d) %s %d\n", visible.start, visible.stop, visible.fileId, visible.modifiedTsNs)
+	}
+
+}
+
+func TestReadResolvedChunks2(t *testing.T) {
+
+	chunks := []*filer_pb.FileChunk{
+		{
+			FileId:       "c",
+			Offset:       200,
+			Size:         50,
+			ModifiedTsNs: 3,
+		},
+		{
+			FileId:       "e",
+			Offset:       200,
+			Size:         25,
+			ModifiedTsNs: 5,
+		},
+	}
+
+	visibles := readResolvedChunks(chunks, 0, math.MaxInt64)
+
+	fmt.Printf("resolved to %d visible intervales\n", visibles.Len())
+	for x := visibles.Front(); x != nil; x = x.Next {
+		visible := x.Value
 		fmt.Printf("[%d,%d) %s %d\n", visible.start, visible.stop, visible.fileId, visible.modifiedTsNs)
 	}

@@ -72,9 +102,10 @@ func TestRandomizedReadResolvedChunks(t *testing.T) {
 		chunks = append(chunks, randomWrite(array, start, size, ts))
 	}

-	visibles := readResolvedChunks(chunks)
+	visibles := readResolvedChunks(chunks, 0, math.MaxInt64)

-	for _, visible := range visibles {
+	for x := visibles.Front(); x != nil; x = x.Next {
+		visible := x.Value
 		for i := visible.start; i < visible.stop; i++ {
 			if array[i] != visible.modifiedTsNs {
 				t.Errorf("position %d expected ts %d actual ts %d", i, array[i], visible.modifiedTsNs)
@@ -112,9 +143,9 @@ func TestSequentialReadResolvedChunks(t *testing.T) {
 		})
 	}

-	visibles := readResolvedChunks(chunks)
+	visibles := readResolvedChunks(chunks, 0, math.MaxInt64)

-	fmt.Printf("visibles %d", len(visibles))
+	fmt.Printf("visibles %d", visibles.Len())

 }

@@ -201,9 +232,48 @@ func TestActualReadResolvedChunks(t *testing.T) {
 		},
 	}

-	visibles := readResolvedChunks(chunks)
+	visibles := readResolvedChunks(chunks, 0, math.MaxInt64)

-	for _, visible := range visibles {
+	for x := visibles.Front(); x != nil; x = x.Next {
+		visible := x.Value
+		fmt.Printf("[%d,%d) %s %d\n", visible.start, visible.stop, visible.fileId, visible.modifiedTsNs)
+	}
+
+}
+
+func TestActualReadResolvedChunks2(t *testing.T) {
+
+	chunks := []*filer_pb.FileChunk{
+		{
+			FileId:       "1,e7b96fef48",
+			Offset:       0,
+			Size:         184320,
+			ModifiedTsNs: 1,
+		},
+		{
+			FileId:       "2,22562640b9",
+			Offset:       184320,
+			Size:         4096,
+			ModifiedTsNs: 2,
+		},
+		{
+			FileId:       "2,33562640b9",
+			Offset:       184320,
+			Size:         4096,
+			ModifiedTsNs: 4,
+		},
+		{
+			FileId:       "4,df033e0fe4",
+			Offset:       188416,
+			Size:         2097152,
+			ModifiedTsNs: 3,
+		},
+	}
+
+	visibles := readResolvedChunks(chunks, 0, math.MaxInt64)
+
+	for x := visibles.Front(); x != nil; x = x.Next {
+		visible := x.Value
 		fmt.Printf("[%d,%d) %s %d\n", visible.start, visible.stop, visible.fileId, visible.modifiedTsNs)
 	}

@@ -92,7 +92,8 @@ func TestRandomFileChunksCompact(t *testing.T) {

 	visibles, _ := NonOverlappingVisibleIntervals(nil, chunks, 0, math.MaxInt64)

-	for _, v := range visibles {
+	for visible := visibles.Front(); visible != nil; visible = visible.Next {
+		v := visible.Value
 		for x := v.start; x < v.stop; x++ {
 			assert.Equal(t, strconv.Itoa(int(data[x])), v.fileId)
 		}
@@ -137,7 +138,7 @@ func TestIntervalMerging(t *testing.T) {
 			},
 			Expected: []*VisibleInterval{
 				{start: 0, stop: 70, fileId: "b"},
-				{start: 70, stop: 100, fileId: "a", chunkOffset: 70},
+				{start: 70, stop: 100, fileId: "a", offsetInChunk: 70},
 			},
 		},
 		// case 3: updates overwrite full chunks
@@ -174,15 +175,15 @@ func TestIntervalMerging(t *testing.T) {
 			},
 			Expected: []*VisibleInterval{
 				{start: 0, stop: 200, fileId: "d"},
-				{start: 200, stop: 220, fileId: "c", chunkOffset: 130},
+				{start: 200, stop: 220, fileId: "c", offsetInChunk: 130},
 			},
 		},
 		// case 6: same updates
 		{
 			Chunks: []*filer_pb.FileChunk{
 				{Offset: 0, Size: 100, FileId: "abc", Fid: &filer_pb.FileId{FileKey: 1}, ModifiedTsNs: 123},
-				{Offset: 0, Size: 100, FileId: "axf", Fid: &filer_pb.FileId{FileKey: 2}, ModifiedTsNs: 123},
-				{Offset: 0, Size: 100, FileId: "xyz", Fid: &filer_pb.FileId{FileKey: 3}, ModifiedTsNs: 123},
+				{Offset: 0, Size: 100, FileId: "axf", Fid: &filer_pb.FileId{FileKey: 2}, ModifiedTsNs: 124},
+				{Offset: 0, Size: 100, FileId: "xyz", Fid: &filer_pb.FileId{FileKey: 3}, ModifiedTsNs: 125},
 			},
 			Expected: []*VisibleInterval{
 				{start: 0, stop: 100, fileId: "xyz"},
@@ -228,11 +229,17 @@ func TestIntervalMerging(t *testing.T) {
 	for i, testcase := range testcases {
 		log.Printf("++++++++++ merged test case %d ++++++++++++++++++++", i)
 		intervals, _ := NonOverlappingVisibleIntervals(nil, testcase.Chunks, 0, math.MaxInt64)
-		for x, interval := range intervals {
-			log.Printf("test case %d, interval %d, start=%d, stop=%d, fileId=%s",
-				i, x, interval.start, interval.stop, interval.fileId)
+		x := -1
+		for visible := intervals.Front(); visible != nil; visible = visible.Next {
+			x++
+			interval := visible.Value
+			log.Printf("test case %d, interval start=%d, stop=%d, fileId=%s",
+				i, interval.start, interval.stop, interval.fileId)
 		}
-		for x, interval := range intervals {
+		x = -1
+		for visible := intervals.Front(); visible != nil; visible = visible.Next {
+			x++
+			interval := visible.Value
 			if interval.start != testcase.Expected[x].start {
 				t.Fatalf("failed on test case %d, interval %d, start %d, expect %d",
 					i, x, interval.start, testcase.Expected[x].start)
@@ -245,13 +252,13 @@ func TestIntervalMerging(t *testing.T) {
 				t.Fatalf("failed on test case %d, interval %d, chunkId %s, expect %s",
 					i, x, interval.fileId, testcase.Expected[x].fileId)
 			}
-			if interval.chunkOffset != testcase.Expected[x].chunkOffset {
-				t.Fatalf("failed on test case %d, interval %d, chunkOffset %d, expect %d",
-					i, x, interval.chunkOffset, testcase.Expected[x].chunkOffset)
+			if interval.offsetInChunk != testcase.Expected[x].offsetInChunk {
+				t.Fatalf("failed on test case %d, interval %d, offsetInChunk %d, expect %d",
+					i, x, interval.offsetInChunk, testcase.Expected[x].offsetInChunk)
 			}
 		}
-		if len(intervals) != len(testcase.Expected) {
-			t.Fatalf("failed to compact test case %d, len %d expected %d", i, len(intervals), len(testcase.Expected))
+		if intervals.Len() != len(testcase.Expected) {
+			t.Fatalf("failed to compact test case %d, len %d expected %d", i, intervals.Len(), len(testcase.Expected))
 		}

 	}
@@ -276,9 +283,9 @@ func TestChunksReading(t *testing.T) {
 			Offset: 0,
 			Size:   250,
 			Expected: []*ChunkView{
-				{Offset: 0, Size: 100, FileId: "abc", LogicOffset: 0},
-				{Offset: 0, Size: 100, FileId: "asdf", LogicOffset: 100},
-				{Offset: 0, Size: 50, FileId: "fsad", LogicOffset: 200},
+				{OffsetInChunk: 0, ViewSize: 100, FileId: "abc", ViewOffset: 0},
+				{OffsetInChunk: 0, ViewSize: 100, FileId: "asdf", ViewOffset: 100},
+				{OffsetInChunk: 0, ViewSize: 50, FileId: "fsad", ViewOffset: 200},
 			},
 		},
 		// case 1: updates overwrite full chunks
@@ -290,7 +297,7 @@ func TestChunksReading(t *testing.T) {
 			Offset: 50,
 			Size:   100,
 			Expected: []*ChunkView{
-				{Offset: 50, Size: 100, FileId: "asdf", LogicOffset: 50},
+				{OffsetInChunk: 50, ViewSize: 100, FileId: "asdf", ViewOffset: 50},
 			},
 		},
 		// case 2: updates overwrite part of previous chunks
@@ -302,8 +309,8 @@ func TestChunksReading(t *testing.T) {
 			Offset: 30,
 			Size:   40,
 			Expected: []*ChunkView{
-				{Offset: 20, Size: 30, FileId: "b", LogicOffset: 30},
-				{Offset: 57, Size: 10, FileId: "a", LogicOffset: 60},
+				{OffsetInChunk: 20, ViewSize: 30, FileId: "b", ViewOffset: 30},
+				{OffsetInChunk: 57, ViewSize: 10, FileId: "a", ViewOffset: 60},
 			},
 		},
 		// case 3: updates overwrite full chunks
@@ -316,8 +323,8 @@ func TestChunksReading(t *testing.T) {
 			Offset: 0,
 			Size:   200,
 			Expected: []*ChunkView{
-				{Offset: 0, Size: 50, FileId: "asdf", LogicOffset: 0},
-				{Offset: 0, Size: 150, FileId: "xxxx", LogicOffset: 50},
+				{OffsetInChunk: 0, ViewSize: 50, FileId: "asdf", ViewOffset: 0},
+				{OffsetInChunk: 0, ViewSize: 150, FileId: "xxxx", ViewOffset: 50},
 			},
 		},
 		// case 4: updates far away from prev chunks
@@ -330,8 +337,8 @@ func TestChunksReading(t *testing.T) {
 			Offset: 0,
 			Size:   400,
 			Expected: []*ChunkView{
-				{Offset: 0, Size: 200, FileId: "asdf", LogicOffset: 0},
-				{Offset: 0, Size: 150, FileId: "xxxx", LogicOffset: 250},
+				{OffsetInChunk: 0, ViewSize: 200, FileId: "asdf", ViewOffset: 0},
+				{OffsetInChunk: 0, ViewSize: 150, FileId: "xxxx", ViewOffset: 250},
 			},
 		},
 		// case 5: updates overwrite full chunks
@@ -345,21 +352,21 @@ func TestChunksReading(t *testing.T) {
 			Offset: 0,
 			Size:   220,
 			Expected: []*ChunkView{
-				{Offset: 0, Size: 200, FileId: "c", LogicOffset: 0},
-				{Offset: 130, Size: 20, FileId: "b", LogicOffset: 200},
+				{OffsetInChunk: 0, ViewSize: 200, FileId: "c", ViewOffset: 0},
+				{OffsetInChunk: 130, ViewSize: 20, FileId: "b", ViewOffset: 200},
 			},
 		},
 		// case 6: same updates
 		{
 			Chunks: []*filer_pb.FileChunk{
 				{Offset: 0, Size: 100, FileId: "abc", Fid: &filer_pb.FileId{FileKey: 1}, ModifiedTsNs: 123},
-				{Offset: 0, Size: 100, FileId: "def", Fid: &filer_pb.FileId{FileKey: 2}, ModifiedTsNs: 123},
-				{Offset: 0, Size: 100, FileId: "xyz", Fid: &filer_pb.FileId{FileKey: 3}, ModifiedTsNs: 123},
+				{Offset: 0, Size: 100, FileId: "def", Fid: &filer_pb.FileId{FileKey: 2}, ModifiedTsNs: 124},
+				{Offset: 0, Size: 100, FileId: "xyz", Fid: &filer_pb.FileId{FileKey: 3}, ModifiedTsNs: 125},
 			},
 			Offset: 0,
 			Size:   100,
 			Expected: []*ChunkView{
-				{Offset: 0, Size: 100, FileId: "xyz", LogicOffset: 0},
+				{OffsetInChunk: 0, ViewSize: 100, FileId: "xyz", ViewOffset: 0},
 			},
 		},
 		// case 7: edge cases
@@ -372,8 +379,8 @@ func TestChunksReading(t *testing.T) {
 			Offset: 0,
 			Size:   200,
 			Expected: []*ChunkView{
-				{Offset: 0, Size: 100, FileId: "abc", LogicOffset: 0},
-				{Offset: 0, Size: 100, FileId: "asdf", LogicOffset: 100},
+				{OffsetInChunk: 0, ViewSize: 100, FileId: "abc", ViewOffset: 0},
+				{OffsetInChunk: 0, ViewSize: 100, FileId: "asdf", ViewOffset: 100},
 			},
 		},
 		// case 8: edge cases
@@ -386,9 +393,9 @@ func TestChunksReading(t *testing.T) {
 			Offset: 0,
 			Size:   300,
 			Expected: []*ChunkView{
-				{Offset: 0, Size: 90, FileId: "abc", LogicOffset: 0},
-				{Offset: 0, Size: 100, FileId: "asdf", LogicOffset: 90},
-				{Offset: 0, Size: 110, FileId: "fsad", LogicOffset: 190},
+				{OffsetInChunk: 0, ViewSize: 90, FileId: "abc", ViewOffset: 0},
+				{OffsetInChunk: 0, ViewSize: 100, FileId: "asdf", ViewOffset: 90},
+				{OffsetInChunk: 0, ViewSize: 110, FileId: "fsad", ViewOffset: 190},
 			},
 		},
 		// case 9: edge cases
@@ -404,12 +411,12 @@ func TestChunksReading(t *testing.T) {
 			Offset: 0,
 			Size:   153578836,
 			Expected: []*ChunkView{
-				{Offset: 0, Size: 43175936, FileId: "2,111fc2cbfac1", LogicOffset: 0},
-				{Offset: 0, Size: 52981760 - 43175936, FileId: "2,112a36ea7f85", LogicOffset: 43175936},
-				{Offset: 0, Size: 72564736 - 52981760, FileId: "4,112d5f31c5e7", LogicOffset: 52981760},
-				{Offset: 0, Size: 133255168 - 72564736, FileId: "1,113245f0cdb6", LogicOffset: 72564736},
-				{Offset: 0, Size: 137269248 - 133255168, FileId: "3,1141a70733b5", LogicOffset: 133255168},
-				{Offset: 0, Size: 153578836 - 137269248, FileId: "1,114201d5bbdb", LogicOffset: 137269248},
+				{OffsetInChunk: 0, ViewSize: 43175936, FileId: "2,111fc2cbfac1", ViewOffset: 0},
+				{OffsetInChunk: 0, ViewSize: 52981760 - 43175936, FileId: "2,112a36ea7f85", ViewOffset: 43175936},
+				{OffsetInChunk: 0, ViewSize: 72564736 - 52981760, FileId: "4,112d5f31c5e7", ViewOffset: 52981760},
+				{OffsetInChunk: 0, ViewSize: 133255168 - 72564736, FileId: "1,113245f0cdb6", ViewOffset: 72564736},
+				{OffsetInChunk: 0, ViewSize: 137269248 - 133255168, FileId: "3,1141a70733b5", ViewOffset: 133255168},
+				{OffsetInChunk: 0, ViewSize: 153578836 - 137269248, FileId: "1,114201d5bbdb", ViewOffset: 137269248},
 			},
 		},
 	}
@@ -420,28 +427,31 @@ func TestChunksReading(t *testing.T) {
 		}
 		log.Printf("++++++++++ read test case %d ++++++++++++++++++++", i)
 		chunks := ViewFromChunks(nil, testcase.Chunks, testcase.Offset, testcase.Size)
-		for x, chunk := range chunks {
+		x := -1
+		for c := chunks.Front(); c != nil; c = c.Next {
+			x++
+			chunk := c.Value
 			log.Printf("read case %d, chunk %d, offset=%d, size=%d, fileId=%s",
-				i, x, chunk.Offset, chunk.Size, chunk.FileId)
-			if chunk.Offset != testcase.Expected[x].Offset {
+				i, x, chunk.OffsetInChunk, chunk.ViewSize, chunk.FileId)
+			if chunk.OffsetInChunk != testcase.Expected[x].OffsetInChunk {
 				t.Fatalf("failed on read case %d, chunk %s, Offset %d, expect %d",
-					i, chunk.FileId, chunk.Offset, testcase.Expected[x].Offset)
+					i, chunk.FileId, chunk.OffsetInChunk, testcase.Expected[x].OffsetInChunk)
 			}
-			if chunk.Size != testcase.Expected[x].Size {
-				t.Fatalf("failed on read case %d, chunk %s, Size %d, expect %d",
-					i, chunk.FileId, chunk.Size, testcase.Expected[x].Size)
+			if chunk.ViewSize != testcase.Expected[x].ViewSize {
+				t.Fatalf("failed on read case %d, chunk %s, ViewSize %d, expect %d",
+					i, chunk.FileId, chunk.ViewSize, testcase.Expected[x].ViewSize)
 			}
 			if chunk.FileId != testcase.Expected[x].FileId {
 				t.Fatalf("failed on read case %d, chunk %d, FileId %s, expect %s",
 					i, x, chunk.FileId, testcase.Expected[x].FileId)
 			}
-			if chunk.LogicOffset != testcase.Expected[x].LogicOffset {
-				t.Fatalf("failed on read case %d, chunk %d, LogicOffset %d, expect %d",
-					i, x, chunk.LogicOffset, testcase.Expected[x].LogicOffset)
+			if chunk.ViewOffset != testcase.Expected[x].ViewOffset {
+				t.Fatalf("failed on read case %d, chunk %d, ViewOffset %d, expect %d",
+					i, x, chunk.ViewOffset, testcase.Expected[x].ViewOffset)
 			}
 		}
-		if len(chunks) != len(testcase.Expected) {
-			t.Fatalf("failed to read test case %d, len %d expected %d", i, len(chunks), len(testcase.Expected))
+		if chunks.Len() != len(testcase.Expected) {
+			t.Fatalf("failed to read test case %d, len %d expected %d", i, chunks.Len(), len(testcase.Expected))
 		}
 	}

@@ -467,73 +477,79 @@ func BenchmarkCompactFileChunks(b *testing.B) {
 	}
 }

+func addVisibleInterval(visibles *IntervalList[*VisibleInterval], x *VisibleInterval) {
+	visibles.AppendInterval(&Interval[*VisibleInterval]{
+		StartOffset: x.start,
+		StopOffset:  x.stop,
+		TsNs:        x.modifiedTsNs,
+		Value:       x,
+	})
+}
+
 func TestViewFromVisibleIntervals(t *testing.T) {
-	visibles := []VisibleInterval{
-		{
-			start:  0,
-			stop:   25,
-			fileId: "fid1",
-		},
-		{
-			start:  4096,
-			stop:   8192,
-			fileId: "fid2",
-		},
-		{
-			start:  16384,
-			stop:   18551,
-			fileId: "fid3",
-		},
-	}
+	visibles := NewIntervalList[*VisibleInterval]()
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:  0,
+		stop:   25,
+		fileId: "fid1",
+	})
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:  4096,
+		stop:   8192,
+		fileId: "fid2",
+	})
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:  16384,
+		stop:   18551,
+		fileId: "fid3",
+	})

 	views := ViewFromVisibleIntervals(visibles, 0, math.MaxInt32)

-	if len(views) != len(visibles) {
-		assert.Equal(t, len(visibles), len(views), "ViewFromVisibleIntervals error")
+	if views.Len() != visibles.Len() {
+		assert.Equal(t, visibles.Len(), views.Len(), "ViewFromVisibleIntervals error")
 	}

 }

 func TestViewFromVisibleIntervals2(t *testing.T) {
-	visibles := []VisibleInterval{
-		{
-			start:  344064,
-			stop:   348160,
-			fileId: "fid1",
-		},
-		{
-			start:  348160,
-			stop:   356352,
-			fileId: "fid2",
-		},
-	}
+	visibles := NewIntervalList[*VisibleInterval]()
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:  344064,
+		stop:   348160,
+		fileId: "fid1",
+	})
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:  348160,
+		stop:   356352,
+		fileId: "fid2",
+	})

 	views := ViewFromVisibleIntervals(visibles, 0, math.MaxInt32)

-	if len(views) != len(visibles) {
-		assert.Equal(t, len(visibles), len(views), "ViewFromVisibleIntervals error")
+	if views.Len() != visibles.Len() {
+		assert.Equal(t, visibles.Len(), views.Len(), "ViewFromVisibleIntervals error")
 	}

 }

 func TestViewFromVisibleIntervals3(t *testing.T) {
-	visibles := []VisibleInterval{
-		{
-			start:  1000,
-			stop:   2000,
-			fileId: "fid1",
-		},
-		{
-			start:  3000,
-			stop:   4000,
-			fileId: "fid2",
-		},
-	}
+	visibles := NewIntervalList[*VisibleInterval]()
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:  1000,
+		stop:   2000,
+		fileId: "fid1",
+	})
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:  3000,
+		stop:   4000,
+		fileId: "fid2",
+	})

 	views := ViewFromVisibleIntervals(visibles, 1700, 1500)

-	if len(views) != len(visibles) {
-		assert.Equal(t, len(visibles), len(views), "ViewFromVisibleIntervals error")
+	if views.Len() != visibles.Len() {
+		assert.Equal(t, visibles.Len(), views.Len(), "ViewFromVisibleIntervals error")
 	}

 }
@@ -32,7 +32,7 @@ type FilerConf struct {

 func ReadFilerConf(filerGrpcAddress pb.ServerAddress, grpcDialOption grpc.DialOption, masterClient *wdclient.MasterClient) (*FilerConf, error) {
 	var buf bytes.Buffer
-	if err := pb.WithGrpcFilerClient(false, filerGrpcAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	if err := pb.WithGrpcFilerClient(false, 0, filerGrpcAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		if masterClient != nil {
 			return ReadEntry(masterClient, client, DirectoryEtcSeaweedFS, FilerConfName, &buf)
 		} else {
@@ -75,7 +75,7 @@ func (fc *FilerConf) loadFromFiler(filer *Filer) (err error) {
 		return fc.LoadFromBytes(entry.Content)
 	}

-	return fc.loadFromChunks(filer, entry.Content, entry.Chunks, entry.Size())
+	return fc.loadFromChunks(filer, entry.Content, entry.GetChunks(), entry.Size())
 }

 func (fc *FilerConf) loadFromChunks(filer *Filer, content []byte, chunks []*filer_pb.FileChunk, size uint64) (err error) {
@@ -48,7 +48,7 @@ func (f *Filer) DeleteEntryMetaAndData(ctx context.Context, p util.FullPath, isR
 	}

 	if shouldDeleteChunks && !isDeleteCollection {
-		f.DirectDeleteChunks(entry.Chunks)
+		f.DirectDeleteChunks(entry.GetChunks())
 	}

 	// delete the file or folder
@@ -93,7 +93,7 @@ func (f *Filer) doBatchDeleteFolderMetaAndData(ctx context.Context, entry *Entry
 						// hard link chunk data are deleted separately
 						err = onHardLinkIdsFn([]HardLinkId{sub.HardLinkId})
 					} else {
-						err = onChunksFn(sub.Chunks)
+						err = onChunksFn(sub.GetChunks())
 					}
 				}
 				if err != nil && !ignoreRecursiveError {
@@ -143,17 +143,17 @@ func (f *Filer) deleteChunksIfNotNew(oldEntry, newEntry *Entry) {
 		return
 	}
 	if newEntry == nil {
-		f.DeleteChunks(oldEntry.Chunks)
+		f.DeleteChunks(oldEntry.GetChunks())
 		return
 	}

 	var toDelete []*filer_pb.FileChunk
 	newChunkIds := make(map[string]bool)
 	newDataChunks, newManifestChunks, err := ResolveChunkManifest(f.MasterClient.GetLookupFileIdFunction(),
-		newEntry.Chunks, 0, math.MaxInt64)
+		newEntry.GetChunks(), 0, math.MaxInt64)
 	if err != nil {
 		glog.Errorf("Failed to resolve new entry chunks when delete old entry chunks. new: %s, old: %s",
-			newEntry.Chunks, oldEntry.Chunks)
+			newEntry.GetChunks(), oldEntry.Chunks)
 		return
 	}
 	for _, newChunk := range newDataChunks {
@@ -164,10 +164,10 @@ func (f *Filer) deleteChunksIfNotNew(oldEntry, newEntry *Entry) {
 	}

 	oldDataChunks, oldManifestChunks, err := ResolveChunkManifest(f.MasterClient.GetLookupFileIdFunction(),
-		oldEntry.Chunks, 0, math.MaxInt64)
+		oldEntry.GetChunks(), 0, math.MaxInt64)
 	if err != nil {
 		glog.Errorf("Failed to resolve old entry chunks when delete old entry chunks. new: %s, old: %s",
-			newEntry.Chunks, oldEntry.Chunks)
+			newEntry.GetChunks(), oldEntry.GetChunks())
 		return
 	}
 	for _, oldChunk := range oldDataChunks {
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"io"
 	"math"
+	"regexp"
 	"strings"
 	"time"

@@ -108,6 +109,10 @@ func (f *Filer) logFlushFunc(startTime, stopTime time.Time, buf []byte) {
 	}
 }

+var (
+	VolumeNotFoundPattern = regexp.MustCompile(`volume \d+? not found`)
+)
+
 func (f *Filer) ReadPersistedLogBuffer(startTime time.Time, stopTsNs int64, eachLogEntryFn func(logEntry *filer_pb.LogEntry) error) (lastTsNs int64, isDone bool, err error) {

 	startTime = startTime.UTC()
@@ -153,12 +158,16 @@ func (f *Filer) ReadPersistedLogBuffer(startTime time.Time, stopTsNs int64, each
 				}
 			}
 			// println("processing", hourMinuteEntry.FullPath)
-			chunkedFileReader := NewChunkStreamReaderFromFiler(f.MasterClient, hourMinuteEntry.Chunks)
+			chunkedFileReader := NewChunkStreamReaderFromFiler(f.MasterClient, hourMinuteEntry.GetChunks())
 			if lastTsNs, err = ReadEachLogEntry(chunkedFileReader, sizeBuf, startTsNs, stopTsNs, eachLogEntryFn); err != nil {
 				chunkedFileReader.Close()
 				if err == io.EOF {
 					continue
 				}
+				if VolumeNotFoundPattern.MatchString(err.Error()) {
+					glog.Warningf("skipping reading %s: %v", hourMinuteEntry.FullPath, err)
+					continue
+				}
 				return lastTsNs, isDone, fmt.Errorf("reading %s: %v", hourMinuteEntry.FullPath, err)
 			}
 			chunkedFileReader.Close()
@@ -36,11 +36,11 @@ func (f *Filer) appendToFile(targetFile string, data []byte) error {
 	} else if err != nil {
 		return fmt.Errorf("find %s: %v", fullpath, err)
 	} else {
-		offset = int64(TotalSize(entry.Chunks))
+		offset = int64(TotalSize(entry.GetChunks()))
 	}

 	// append to existing chunks
-	entry.Chunks = append(entry.Chunks, uploadResult.ToPbFileChunk(assignResult.Fid, offset))
+	entry.Chunks = append(entry.GetChunks(), uploadResult.ToPbFileChunk(assignResult.Fid, offset, time.Now().UnixNano()))

 	// update the entry
 	err = f.CreateEntry(context.Background(), entry, false, false, nil, false)
@@ -44,7 +44,7 @@ func TestProtoMarshal(t *testing.T) {
 	notification2 := &filer_pb.EventNotification{}
 	proto.Unmarshal(text, notification2)

-	if notification2.OldEntry.Chunks[0].SourceFileId != notification.OldEntry.Chunks[0].SourceFileId {
+	if notification2.OldEntry.GetChunks()[0].SourceFileId != notification.OldEntry.GetChunks()[0].SourceFileId {
 		t.Fatalf("marshal/unmarshal error: %s", text)
 	}

@@ -60,7 +60,7 @@ func (f *Filer) readEntry(chunks []*filer_pb.FileChunk, size uint64) ([]byte, er

 func (f *Filer) reloadFilerConfiguration(entry *filer_pb.Entry) {
 	fc := NewFilerConf()
-	err := fc.loadFromChunks(f, entry.Content, entry.Chunks, FileSize(entry))
+	err := fc.loadFromChunks(f, entry.Content, entry.GetChunks(), FileSize(entry))
 	if err != nil {
 		glog.Errorf("read filer conf chunks: %v", err)
 		return
@@ -2,13 +2,14 @@ package filer

 import (
 	"context"
-	"github.com/seaweedfs/seaweedfs/weed/glog"
-	"github.com/viant/ptrie"
 	"io"
 	"math"
 	"strings"
 	"time"

+	"github.com/seaweedfs/seaweedfs/weed/glog"
+	"github.com/viant/ptrie"
+
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
 	"github.com/seaweedfs/seaweedfs/weed/stats"
 	"github.com/seaweedfs/seaweedfs/weed/util"
@@ -118,7 +119,7 @@ func (fsw *FilerStoreWrapper) InsertEntry(ctx context.Context, entry *Entry) err
 		stats.FilerStoreHistogram.WithLabelValues(actualStore.GetName(), "insert").Observe(time.Since(start).Seconds())
 	}()

-	filer_pb.BeforeEntrySerialization(entry.Chunks)
+	filer_pb.BeforeEntrySerialization(entry.GetChunks())
 	if entry.Mime == "application/octet-stream" {
 		entry.Mime = ""
 	}
@@ -139,7 +140,7 @@ func (fsw *FilerStoreWrapper) UpdateEntry(ctx context.Context, entry *Entry) err
 		stats.FilerStoreHistogram.WithLabelValues(actualStore.GetName(), "update").Observe(time.Since(start).Seconds())
 	}()

-	filer_pb.BeforeEntrySerialization(entry.Chunks)
+	filer_pb.BeforeEntrySerialization(entry.GetChunks())
 	if entry.Mime == "application/octet-stream" {
 		entry.Mime = ""
 	}
@@ -168,7 +169,7 @@ func (fsw *FilerStoreWrapper) FindEntry(ctx context.Context, fp util.FullPath) (

 	fsw.maybeReadHardLink(ctx, entry)

-	filer_pb.AfterEntryDeserialization(entry.Chunks)
+	filer_pb.AfterEntryDeserialization(entry.GetChunks())
 	return
 }

@@ -186,9 +187,12 @@ func (fsw *FilerStoreWrapper) DeleteEntry(ctx context.Context, fp util.FullPath)
 	}
 	if len(existingEntry.HardLinkId) != 0 {
 		// remove hard link
-		glog.V(4).Infof("DeleteHardLink %s", existingEntry.FullPath)
-		if err = fsw.DeleteHardLink(ctx, existingEntry.HardLinkId); err != nil {
-			return err
+		op := ctx.Value("OP")
+		if op != "MV" {
+			glog.V(4).Infof("DeleteHardLink %s", existingEntry.FullPath)
+			if err = fsw.DeleteHardLink(ctx, existingEntry.HardLinkId); err != nil {
+				return err
+			}
 		}
 	}

@@ -206,9 +210,12 @@ func (fsw *FilerStoreWrapper) DeleteOneEntry(ctx context.Context, existingEntry

 	if len(existingEntry.HardLinkId) != 0 {
 		// remove hard link
-		glog.V(4).Infof("DeleteHardLink %s", existingEntry.FullPath)
-		if err = fsw.DeleteHardLink(ctx, existingEntry.HardLinkId); err != nil {
-			return err
+		op := ctx.Value("OP")
+		if op != "MV" {
+			glog.V(4).Infof("DeleteHardLink %s", existingEntry.FullPath)
+			if err = fsw.DeleteHardLink(ctx, existingEntry.HardLinkId); err != nil {
+				return err
+			}
 		}
 	}

@@ -239,7 +246,7 @@ func (fsw *FilerStoreWrapper) ListDirectoryEntries(ctx context.Context, dirPath
 	// glog.V(4).Infof("ListDirectoryEntries %s from %s limit %d", dirPath, startFileName, limit)
 	return actualStore.ListDirectoryEntries(ctx, dirPath, startFileName, includeStartFile, limit, func(entry *Entry) bool {
 		fsw.maybeReadHardLink(ctx, entry)
-		filer_pb.AfterEntryDeserialization(entry.Chunks)
+		filer_pb.AfterEntryDeserialization(entry.GetChunks())
 		return eachEntryFunc(entry)
 	})
 }
@@ -257,7 +264,7 @@ func (fsw *FilerStoreWrapper) ListDirectoryPrefixedEntries(ctx context.Context,
 	// glog.V(4).Infof("ListDirectoryPrefixedEntries %s from %s prefix %s limit %d", dirPath, startFileName, prefix, limit)
 	adjustedEntryFunc := func(entry *Entry) bool {
 		fsw.maybeReadHardLink(ctx, entry)
-		filer_pb.AfterEntryDeserialization(entry.Chunks)
+		filer_pb.AfterEntryDeserialization(entry.GetChunks())
 		return eachEntryFunc(entry)
 	}
 	lastFileName, err = actualStore.ListDirectoryPrefixedEntries(ctx, dirPath, startFileName, includeStartFile, limit, prefix, adjustedEntryFunc)
@@ -75,7 +75,7 @@ func (store *HbaseStore) InsertEntry(ctx context.Context, entry *filer.Entry) er
 	if err != nil {
 		return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err)
 	}
-	if len(entry.Chunks) > filer.CountEntryChunksForGzip {
+	if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
 		value = util.MaybeGzipData(value)
 	}

@@ -0,0 +1,259 @@
+package filer
+
+import (
+	"math"
+	"sync"
+)
+
+type IntervalValue interface {
+	SetStartStop(start, stop int64)
+	Clone() IntervalValue
+}
+
+type Interval[T IntervalValue] struct {
+	StartOffset int64
+	StopOffset  int64
+	TsNs        int64
+	Value       T
+	Prev        *Interval[T]
+	Next        *Interval[T]
+}
+
+func (interval *Interval[T]) Size() int64 {
+	return interval.StopOffset - interval.StartOffset
+}
+
+// IntervalList mark written intervals within one page chunk
+type IntervalList[T IntervalValue] struct {
+	head *Interval[T]
+	tail *Interval[T]
+	Lock sync.Mutex
+}
+
+func NewIntervalList[T IntervalValue]() *IntervalList[T] {
+	list := &IntervalList[T]{
+		head: &Interval[T]{
+			StartOffset: -1,
+			StopOffset:  -1,
+		},
+		tail: &Interval[T]{
+			StartOffset: math.MaxInt64,
+			StopOffset:  math.MaxInt64,
+		},
+	}
+	return list
+}
+
+func (list *IntervalList[T]) Front() (interval *Interval[T]) {
+	return list.head.Next
+}
+
+func (list *IntervalList[T]) AppendInterval(interval *Interval[T]) {
+	list.Lock.Lock()
+	defer list.Lock.Unlock()
+
+	if list.head.Next == nil {
+		list.head.Next = interval
+	}
+	interval.Prev = list.tail.Prev
+	if list.tail.Prev != nil {
+		list.tail.Prev.Next = interval
+	}
+	list.tail.Prev = interval
+}
+
+func (list *IntervalList[T]) Overlay(startOffset, stopOffset, tsNs int64, value T) {
+	if startOffset >= stopOffset {
+		return
+	}
+	interval := &Interval[T]{
+		StartOffset: startOffset,
+		StopOffset:  stopOffset,
+		TsNs:        tsNs,
+		Value:       value,
+	}
+
+	list.Lock.Lock()
+	defer list.Lock.Unlock()
+
+	list.overlayInterval(interval)
+}
+
+func (list *IntervalList[T]) InsertInterval(startOffset, stopOffset, tsNs int64, value T) {
+	interval := &Interval[T]{
+		StartOffset: startOffset,
+		StopOffset:  stopOffset,
+		TsNs:        tsNs,
+		Value:       value,
+	}
+
+	list.Lock.Lock()
+	defer list.Lock.Unlock()
+
+	value.SetStartStop(startOffset, stopOffset)
+	list.insertInterval(interval)
+}
+
+func (list *IntervalList[T]) insertInterval(interval *Interval[T]) {
+	prev := list.head
+	next := prev.Next
+
+	for interval.StartOffset < interval.StopOffset {
+		if next == nil {
+			// add to the end
+			list.insertBetween(prev, interval, list.tail)
+			break
+		}
+
+		// interval is ahead of the next
+		if interval.StopOffset <= next.StartOffset {
+			list.insertBetween(prev, interval, next)
+			break
+		}
+
+		// interval is after the next
+		if next.StopOffset <= interval.StartOffset {
+			prev = next
+			next = next.Next
+			continue
+		}
+
+		// intersecting next and interval
+		if interval.TsNs >= next.TsNs {
+			// interval is newer
+			if next.StartOffset < interval.StartOffset {
+				// left side of next is ahead of interval
+				t := &Interval[T]{
+					StartOffset: next.StartOffset,
+					StopOffset:  interval.StartOffset,
+					TsNs:        next.TsNs,
+					Value:       next.Value.Clone().(T),
+				}
+				t.Value.SetStartStop(t.StartOffset, t.StopOffset)
+				list.insertBetween(prev, t, interval)
+				next.StartOffset = interval.StartOffset
+				next.Value.SetStartStop(next.StartOffset, next.StopOffset)
+				prev = t
+			}
+			if interval.StopOffset < next.StopOffset {
+				// right side of next is after interval
+				next.StartOffset = interval.StopOffset
+				next.Value.SetStartStop(next.StartOffset, next.StopOffset)
+				list.insertBetween(prev, interval, next)
+				break
+			} else {
+				// next is covered
+				prev.Next = interval
+				next = next.Next
+			}
+		} else {
+			// next is newer
+			if interval.StartOffset < next.StartOffset {
+				// left side of interval is ahead of next
+				t := &Interval[T]{
+					StartOffset: interval.StartOffset,
+					StopOffset:  next.StartOffset,
+					TsNs:        interval.TsNs,
+					Value:       interval.Value.Clone().(T),
+				}
+				t.Value.SetStartStop(t.StartOffset, t.StopOffset)
+				list.insertBetween(prev, t, next)
+				interval.StartOffset = next.StartOffset
+				interval.Value.SetStartStop(interval.StartOffset, interval.StopOffset)
+			}
+			if next.StopOffset < interval.StopOffset {
+				// right side of interval is after next
+				interval.StartOffset = next.StopOffset
+				interval.Value.SetStartStop(interval.StartOffset, interval.StopOffset)
+			} else {
+				// interval is covered
+				break
+			}
+		}
+
+	}
+}
+
+func (list *IntervalList[T]) insertBetween(a, interval, b *Interval[T]) {
+	a.Next = interval
+	b.Prev = interval
+	if a != list.head {
+		interval.Prev = a
+	}
+	if b != list.tail {
+		interval.Next = b
+	}
+}
+
+func (list *IntervalList[T]) overlayInterval(interval *Interval[T]) {
+
+	//t := list.head
+	//for ; t.Next != nil; t = t.Next {
+	//	if t.TsNs > interval.TsNs {
+	//		println("writes is out of order", t.TsNs-interval.TsNs, "ns")
+	//	}
+	//}
+
+	p := list.head
+	for ; p.Next != nil && p.Next.StopOffset <= interval.StartOffset; p = p.Next {
+	}
+	q := list.tail
+	for ; q.Prev != nil && q.Prev.StartOffset >= interval.StopOffset; q = q.Prev {
+	}
+
+	// left side
+	// interval after p.Next start
+	if p.Next != nil && p.Next.StartOffset < interval.StartOffset {
+		t := &Interval[T]{
+			StartOffset: p.Next.StartOffset,
+			StopOffset:  interval.StartOffset,
+			TsNs:        p.Next.TsNs,
+			Value:       p.Next.Value,
+		}
+		p.Next = t
+		if p != list.head {
+			t.Prev = p
+		}
+		t.Next = interval
+		interval.Prev = t
+	} else {
+		p.Next = interval
+		if p != list.head {
+			interval.Prev = p
+		}
+	}
+
+	// right side
+	// interval ends before p.Prev
+	if q.Prev != nil && interval.StopOffset < q.Prev.StopOffset {
+		t := &Interval[T]{
+			StartOffset: interval.StopOffset,
+			StopOffset:  q.Prev.StopOffset,
+			TsNs:        q.Prev.TsNs,
+			Value:       q.Prev.Value,
+		}
+		q.Prev = t
+		if q != list.tail {
+			t.Next = q
+		}
+		interval.Next = t
+		t.Prev = interval
+	} else {
+		q.Prev = interval
+		if q != list.tail {
+			interval.Next = q
+		}
+	}
+
+}
+
+func (list *IntervalList[T]) Len() int {
+	list.Lock.Lock()
+	defer list.Lock.Unlock()
+
+	var count int
+	for t := list.head; t != nil; t = t.Next {
+		count++
+	}
+	return count - 1
+}
@@ -0,0 +1,327 @@
+package filer
+
+import (
+	"fmt"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+type IntervalInt int
+
+func (i IntervalInt) SetStartStop(start, stop int64) {
+}
+func (i IntervalInt) Clone() IntervalValue {
+	return i
+}
+
+func TestIntervalList_Overlay(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+	list.Overlay(0, 100, 1, 1)
+	list.Overlay(50, 150, 2, 2)
+	list.Overlay(200, 250, 3, 3)
+	list.Overlay(225, 250, 4, 4)
+	list.Overlay(175, 210, 5, 5)
+	list.Overlay(0, 25, 6, 6)
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 6, list.Len())
+	println()
+	list.Overlay(50, 150, 7, 7)
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 6, list.Len())
+}
+
+func TestIntervalList_Overlay2(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+	list.Overlay(50, 100, 1, 1)
+	list.Overlay(0, 50, 2, 2)
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+}
+
+func TestIntervalList_Overlay3(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+	list.Overlay(50, 100, 1, 1)
+	assert.Equal(t, 1, list.Len())
+
+	list.Overlay(0, 60, 2, 2)
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 2, list.Len())
+}
+
+func TestIntervalList_Overlay4(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+	list.Overlay(50, 100, 1, 1)
+	list.Overlay(0, 100, 2, 2)
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 1, list.Len())
+}
+
+func TestIntervalList_Overlay5(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+	list.Overlay(50, 100, 1, 1)
+	list.Overlay(0, 110, 2, 2)
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 1, list.Len())
+}
+
+func TestIntervalList_Overlay6(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+	list.Overlay(50, 100, 1, 1)
+	list.Overlay(50, 110, 2, 2)
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 1, list.Len())
+}
+
+func TestIntervalList_Overlay7(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+	list.Overlay(50, 100, 1, 1)
+	list.Overlay(50, 90, 2, 2)
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 2, list.Len())
+}
+
+func TestIntervalList_Overlay8(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+	list.Overlay(50, 100, 1, 1)
+	list.Overlay(60, 90, 2, 2)
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 3, list.Len())
+}
+
+func TestIntervalList_Overlay9(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+	list.Overlay(50, 100, 1, 1)
+	list.Overlay(60, 100, 2, 2)
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 2, list.Len())
+}
+
+func TestIntervalList_Overlay10(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+	list.Overlay(50, 100, 1, 1)
+	list.Overlay(60, 110, 2, 2)
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 2, list.Len())
+}
+
+func TestIntervalList_Overlay11(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+	list.Overlay(0, 100, 1, 1)
+	list.Overlay(100, 110, 2, 2)
+	list.Overlay(0, 90, 3, 3)
+	list.Overlay(0, 80, 4, 4)
+	list.Overlay(0, 90, 5, 5)
+	list.Overlay(90, 90, 6, 6)
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 3, list.Len())
+}
+
+func TestIntervalList_insertInterval1(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+	list.InsertInterval(50, 150, 2, 2)
+	list.InsertInterval(200, 250, 3, 3)
+
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 2, list.Len())
+}
+
+func TestIntervalList_insertInterval2(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+	list.InsertInterval(50, 150, 2, 2)
+	list.InsertInterval(0, 25, 3, 3)
+
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 2, list.Len())
+}
+
+func TestIntervalList_insertInterval3(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+	list.InsertInterval(50, 150, 2, 2)
+	list.InsertInterval(200, 250, 4, 4)
+
+	list.InsertInterval(0, 75, 3, 3)
+
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 3, list.Len())
+}
+
+func TestIntervalList_insertInterval4(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+	list.InsertInterval(200, 250, 4, 4)
+
+	list.InsertInterval(0, 225, 3, 3)
+
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 2, list.Len())
+}
+
+func TestIntervalList_insertInterval5(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+	list.InsertInterval(200, 250, 4, 4)
+
+	list.InsertInterval(0, 225, 5, 5)
+
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 2, list.Len())
+}
+
+func TestIntervalList_insertInterval6(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+
+	list.InsertInterval(50, 150, 2, 2)
+	list.InsertInterval(200, 250, 4, 4)
+
+	list.InsertInterval(0, 275, 1, 1)
+
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 5, list.Len())
+}
+
+func TestIntervalList_insertInterval7(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+
+	list.InsertInterval(50, 150, 2, 2)
+	list.InsertInterval(200, 250, 4, 4)
+
+	list.InsertInterval(75, 275, 1, 1)
+
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 4, list.Len())
+}
+
+func TestIntervalList_insertInterval8(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+
+	list.InsertInterval(50, 150, 2, 2)
+	list.InsertInterval(200, 250, 4, 4)
+
+	list.InsertInterval(75, 275, 3, 3)
+
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 4, list.Len())
+}
+
+func TestIntervalList_insertInterval9(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+
+	list.InsertInterval(50, 150, 2, 2)
+	list.InsertInterval(200, 250, 4, 4)
+
+	list.InsertInterval(50, 150, 3, 3)
+
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 2, list.Len())
+}
+
+func TestIntervalList_insertInterval10(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+
+	list.InsertInterval(50, 100, 2, 2)
+
+	list.InsertInterval(200, 300, 4, 4)
+
+	list.InsertInterval(100, 200, 5, 5)
+
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 3, list.Len())
+}
+
+func TestIntervalList_insertInterval11(t *testing.T) {
+	list := NewIntervalList[IntervalInt]()
+
+	list.InsertInterval(0, 64, 1, 1)
+
+	list.InsertInterval(72, 136, 3, 3)
+
+	list.InsertInterval(64, 128, 2, 2)
+
+	list.InsertInterval(68, 72, 4, 4)
+
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 4, list.Len())
+}
+
+type IntervalStruct struct {
+	x     int
+	start int64
+	stop  int64
+}
+
+func newIntervalStruct(i int) IntervalStruct {
+	return IntervalStruct{
+		x: i,
+	}
+}
+
+func (i IntervalStruct) SetStartStop(start, stop int64) {
+	i.start, i.stop = start, stop
+}
+func (i IntervalStruct) Clone() IntervalValue {
+	return &IntervalStruct{
+		x:     i.x,
+		start: i.start,
+		stop:  i.stop,
+	}
+}
+
+func TestIntervalList_insertIntervalStruct(t *testing.T) {
+	list := NewIntervalList[IntervalStruct]()
+
+	list.InsertInterval(0, 64, 1, newIntervalStruct(1))
+
+	list.InsertInterval(64, 72, 2, newIntervalStruct(2))
+
+	list.InsertInterval(72, 136, 3, newIntervalStruct(3))
+
+	list.InsertInterval(64, 68, 4, newIntervalStruct(4))
+
+	for p := list.Front(); p != nil; p = p.Next {
+		fmt.Printf("[%d,%d) %d %d\n", p.StartOffset, p.StopOffset, p.TsNs, p.Value)
+	}
+	assert.Equal(t, 4, list.Len())
+}
@@ -86,7 +86,7 @@ func (store *LevelDBStore) InsertEntry(ctx context.Context, entry *filer.Entry)
 		return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err)
 	}

-	if len(entry.Chunks) > filer.CountEntryChunksForGzip {
+	if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
 		value = weed_util.MaybeGzipData(value)
 	}

@@ -96,7 +96,7 @@ func (store *LevelDBStore) InsertEntry(ctx context.Context, entry *filer.Entry)
 		return fmt.Errorf("persisting %s : %v", entry.FullPath, err)
 	}

-	// println("saved", entry.FullPath, "chunks", len(entry.Chunks))
+	// println("saved", entry.FullPath, "chunks", len(entry.GetChunks()))

 	return nil
 }
@@ -126,7 +126,7 @@ func (store *LevelDBStore) FindEntry(ctx context.Context, fullpath weed_util.Ful
 		return entry, fmt.Errorf("decode %s : %v", entry.FullPath, err)
 	}

-	// println("read", entry.FullPath, "chunks", len(entry.Chunks), "data", len(data), string(data))
+	// println("read", entry.FullPath, "chunks", len(entry.GetChunks()), "data", len(data), string(data))

 	return entry, nil
 }
@@ -88,7 +88,7 @@ func (store *LevelDB2Store) InsertEntry(ctx context.Context, entry *filer.Entry)
 		return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err)
 	}

-	if len(entry.Chunks) > filer.CountEntryChunksForGzip {
+	if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
 		value = weed_util.MaybeGzipData(value)
 	}

@@ -98,7 +98,7 @@ func (store *LevelDB2Store) InsertEntry(ctx context.Context, entry *filer.Entry)
 		return fmt.Errorf("persisting %s : %v", entry.FullPath, err)
 	}

-	// println("saved", entry.FullPath, "chunks", len(entry.Chunks))
+	// println("saved", entry.FullPath, "chunks", len(entry.GetChunks()))

 	return nil
 }
@@ -129,7 +129,7 @@ func (store *LevelDB2Store) FindEntry(ctx context.Context, fullpath weed_util.Fu
 		return entry, fmt.Errorf("decode %s : %v", entry.FullPath, err)
 	}

-	// println("read", entry.FullPath, "chunks", len(entry.Chunks), "data", len(data), string(data))
+	// println("read", entry.FullPath, "chunks", len(entry.GetChunks()), "data", len(data), string(data))

 	return entry, nil
 }
@@ -208,7 +208,7 @@ func (store *LevelDB2Store) ListDirectoryPrefixedEntries(ctx context.Context, di
 			FullPath: weed_util.NewFullPath(string(dirPath), fileName),
 		}

-		// println("list", entry.FullPath, "chunks", len(entry.Chunks))
+		// println("list", entry.FullPath, "chunks", len(entry.GetChunks()))
 		if decodeErr := entry.DecodeAttributesAndChunks(weed_util.MaybeDecompressData(iter.Value())); decodeErr != nil {
 			err = decodeErr
 			glog.V(0).Infof("list %s : %v", entry.FullPath, err)
@@ -185,7 +185,7 @@ func (store *LevelDB3Store) InsertEntry(ctx context.Context, entry *filer.Entry)
 		return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err)
 	}

-	if len(entry.Chunks) > filer.CountEntryChunksForGzip {
+	if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
 		value = weed_util.MaybeGzipData(value)
 	}

@@ -195,7 +195,7 @@ func (store *LevelDB3Store) InsertEntry(ctx context.Context, entry *filer.Entry)
 		return fmt.Errorf("persisting %s : %v", entry.FullPath, err)
 	}

-	// println("saved", entry.FullPath, "chunks", len(entry.Chunks))
+	// println("saved", entry.FullPath, "chunks", len(entry.GetChunks()))

 	return nil
 }
@@ -232,7 +232,7 @@ func (store *LevelDB3Store) FindEntry(ctx context.Context, fullpath weed_util.Fu
 		return entry, fmt.Errorf("decode %s : %v", entry.FullPath, err)
 	}

-	// println("read", entry.FullPath, "chunks", len(entry.Chunks), "data", len(data), string(data))
+	// println("read", entry.FullPath, "chunks", len(entry.GetChunks()), "data", len(data), string(data))

 	return entry, nil
 }
@@ -336,7 +336,7 @@ func (store *LevelDB3Store) ListDirectoryPrefixedEntries(ctx context.Context, di
 			FullPath: weed_util.NewFullPath(string(dirPath), fileName),
 		}

-		// println("list", entry.FullPath, "chunks", len(entry.Chunks))
+		// println("list", entry.FullPath, "chunks", len(entry.GetChunks()))
 		if decodeErr := entry.DecodeAttributesAndChunks(weed_util.MaybeDecompressData(iter.Value())); decodeErr != nil {
 			err = decodeErr
 			glog.V(0).Infof("list %s : %v", entry.FullPath, err)
@@ -192,7 +192,7 @@ func (ma *MetaAggregator) doSubscribeToOneFiler(f *Filer, self pb.ServerAddress,
 	}

 	glog.V(0).Infof("subscribing remote %s meta change: %v, clientId:%d", peer, time.Unix(0, lastTsNs), ma.filer.UniqueFilerId)
-	err = pb.WithFilerClient(true, peer, ma.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	err = pb.WithFilerClient(true, 0, peer, ma.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		ctx, cancel := context.WithCancel(context.Background())
 		defer cancel()
 		atomic.AddInt32(&ma.filer.UniqueFilerEpoch, 1)
@@ -228,7 +228,7 @@ func (ma *MetaAggregator) doSubscribeToOneFiler(f *Filer, self pb.ServerAddress,
 }

 func (ma *MetaAggregator) readFilerStoreSignature(peer pb.ServerAddress) (sig int32, err error) {
-	err = pb.WithFilerClient(false, peer, ma.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	err = pb.WithFilerClient(false, 0, peer, ma.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
 		if err != nil {
 			return err
@@ -243,10 +243,15 @@ const (
 	MetaOffsetPrefix = "Meta"
 )

-func (ma *MetaAggregator) readOffset(f *Filer, peer pb.ServerAddress, peerSignature int32) (lastTsNs int64, err error) {
-
+func GetPeerMetaOffsetKey(peerSignature int32) []byte {
 	key := []byte(MetaOffsetPrefix + "xxxx")
 	util.Uint32toBytes(key[len(MetaOffsetPrefix):], uint32(peerSignature))
+	return key
+}
+
+func (ma *MetaAggregator) readOffset(f *Filer, peer pb.ServerAddress, peerSignature int32) (lastTsNs int64, err error) {
+
+	key := GetPeerMetaOffsetKey(peerSignature)

 	value, err := f.Store.KvGet(context.Background(), key)

@@ -263,8 +268,7 @@ func (ma *MetaAggregator) readOffset(f *Filer, peer pb.ServerAddress, peerSignat

 func (ma *MetaAggregator) updateOffset(f *Filer, peer pb.ServerAddress, peerSignature int32, lastTsNs int64) (err error) {

-	key := []byte(MetaOffsetPrefix + "xxxx")
-	util.Uint32toBytes(key[len(MetaOffsetPrefix):], uint32(peerSignature))
+	key := GetPeerMetaOffsetKey(peerSignature)

 	value := make([]byte, 8)
 	util.Uint64toBytes(value, uint64(lastTsNs))
@@ -107,7 +107,7 @@ func (store *MongodbStore) UpdateEntry(ctx context.Context, entry *filer.Entry)
 		return fmt.Errorf("encode %s: %s", entry.FullPath, err)
 	}

-	if len(entry.Chunks) > filer.CountEntryChunksForGzip {
+	if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
 		meta = util.MaybeGzipData(meta)
 	}

@@ -21,32 +21,32 @@ func (gen *SqlGenMysql) GetSqlInsert(tableName string) string {
 	if gen.UpsertQueryTemplate != "" {
 		return fmt.Sprintf(gen.UpsertQueryTemplate, tableName)
 	} else {
-		return fmt.Sprintf("INSERT INTO `%s` (dirhash,name,directory,meta) VALUES(?,?,?,?)", tableName)
+		return fmt.Sprintf("INSERT INTO `%s` (`dirhash`,`name`,`directory`,`meta`) VALUES(?,?,?,?)", tableName)
 	}
 }

 func (gen *SqlGenMysql) GetSqlUpdate(tableName string) string {
-	return fmt.Sprintf("UPDATE `%s` SET meta=? WHERE dirhash=? AND name=? AND directory=?", tableName)
+	return fmt.Sprintf("UPDATE `%s` SET `meta` = ? WHERE `dirhash` = ? AND `name` = ? AND `directory` = ?", tableName)
 }

 func (gen *SqlGenMysql) GetSqlFind(tableName string) string {
-	return fmt.Sprintf("SELECT meta FROM `%s` WHERE dirhash=? AND name=? AND directory=?", tableName)
+	return fmt.Sprintf("SELECT `meta` FROM `%s` WHERE `dirhash` = ? AND `name` = ? AND `directory` = ?", tableName)
 }

 func (gen *SqlGenMysql) GetSqlDelete(tableName string) string {
-	return fmt.Sprintf("DELETE FROM `%s` WHERE dirhash=? AND name=? AND directory=?", tableName)
+	return fmt.Sprintf("DELETE FROM `%s` WHERE `dirhash` = ? AND `name` = ? AND `directory` = ?", tableName)
 }

 func (gen *SqlGenMysql) GetSqlDeleteFolderChildren(tableName string) string {
-	return fmt.Sprintf("DELETE FROM `%s` WHERE dirhash=? AND directory=?", tableName)
+	return fmt.Sprintf("DELETE FROM `%s` WHERE `dirhash` = ? AND `directory` = ?", tableName)
 }

 func (gen *SqlGenMysql) GetSqlListExclusive(tableName string) string {
-	return fmt.Sprintf("SELECT NAME, meta FROM `%s` WHERE dirhash=? AND name>? AND directory=? AND name like ? ORDER BY NAME ASC LIMIT ?", tableName)
+	return fmt.Sprintf("SELECT `name`, `meta` FROM `%s` WHERE `dirhash` = ? AND `name` > ? AND `directory` = ? AND `name` LIKE ? ORDER BY `name` ASC LIMIT ?", tableName)
 }

 func (gen *SqlGenMysql) GetSqlListInclusive(tableName string) string {
-	return fmt.Sprintf("SELECT NAME, meta FROM `%s` WHERE dirhash=? AND name>=? AND directory=? AND name like ? ORDER BY NAME ASC LIMIT ?", tableName)
+	return fmt.Sprintf("SELECT `name`, `meta` FROM `%s` WHERE `dirhash` = ? AND `name` >= ? AND `directory` = ? AND `name` LIKE ? ORDER BY `name` ASC LIMIT ?", tableName)
 }

 func (gen *SqlGenMysql) GetSqlCreateTable(tableName string) string {
@@ -13,7 +13,7 @@ import (
 )

 const (
-	CONNECTION_URL_PATTERN = "%s:%s@tcp(%s:%d)/%s?charset=utf8"
+	CONNECTION_URL_PATTERN = "%s:%s@tcp(%s:%d)/%s?collation=utf8mb4_bin"
 )

 func init() {
@@ -53,7 +53,7 @@ func (store *MysqlStore) initialize(upsertQuery string, enableUpsert bool, user,
 	}
 	store.SqlGenerator = &SqlGenMysql{
 		CreateTableSqlTemplate: "",
-		DropTableSqlTemplate:   "drop table `%s`",
+		DropTableSqlTemplate:   "DROP TABLE `%s`",
 		UpsertQueryTemplate:    upsertQuery,
 	}

@@ -15,7 +15,7 @@ import (
 )

 const (
-	CONNECTION_URL_PATTERN = "%s:%s@tcp(%s:%d)/%s?charset=utf8"
+	CONNECTION_URL_PATTERN = "%s:%s@tcp(%s:%d)/%s?collation=utf8mb4_bin"
 )

 var _ filer.BucketAware = (*MysqlStore2)(nil)
@@ -58,7 +58,7 @@ func (store *MysqlStore2) initialize(createTable, upsertQuery string, enableUpse
 	}
 	store.SqlGenerator = &mysql.SqlGenMysql{
 		CreateTableSqlTemplate: createTable,
-		DropTableSqlTemplate:   "drop table `%s`",
+		DropTableSqlTemplate:   "DROP TABLE `%s`",
 		UpsertQueryTemplate:    upsertQuery,
 	}

@@ -8,7 +8,7 @@ import (
 )

 func (entry *Entry) IsInRemoteOnly() bool {
-	return len(entry.Chunks) == 0 && entry.Remote != nil && entry.Remote.RemoteSize > 0
+	return len(entry.GetChunks()) == 0 && entry.Remote != nil && entry.Remote.RemoteSize > 0
 }

 func MapFullPathToRemoteStorageLocation(localMountedDir util.FullPath, remoteMountedLocation *remote_pb.RemoteStorageLocation, fp util.FullPath) *remote_pb.RemoteStorageLocation {
@@ -23,7 +23,7 @@ func ReadEntry(masterClient *wdclient.MasterClient, filerClient filer_pb.Seaweed
 		return err
 	}

-	return StreamContent(masterClient, byteBuffer, respLookupEntry.Entry.Chunks, 0, int64(FileSize(respLookupEntry.Entry)))
+	return StreamContent(masterClient, byteBuffer, respLookupEntry.Entry.GetChunks(), 0, int64(FileSize(respLookupEntry.Entry)))

 }

@@ -10,14 +10,12 @@ import (
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
 	"github.com/seaweedfs/seaweedfs/weed/util"
-	"github.com/seaweedfs/seaweedfs/weed/util/chunk_cache"
 	"github.com/seaweedfs/seaweedfs/weed/wdclient"
 )

 type ChunkReadAt struct {
 	masterClient  *wdclient.MasterClient
-	chunkViews    []*ChunkView
-	readerLock    sync.Mutex
+	chunkViews    *IntervalList[*ChunkView]
 	fileSize      int64
 	readerCache   *ReaderCache
 	readerPattern *ReaderPattern
@@ -89,12 +87,12 @@ func LookupFn(filerClient filer_pb.FilerClient) wdclient.LookupFileIdFunctionTyp
 	}
 }

-func NewChunkReaderAtFromClient(lookupFn wdclient.LookupFileIdFunctionType, chunkViews []*ChunkView, chunkCache chunk_cache.ChunkCache, fileSize int64) *ChunkReadAt {
+func NewChunkReaderAtFromClient(readerCache *ReaderCache, chunkViews *IntervalList[*ChunkView], fileSize int64) *ChunkReadAt {

 	return &ChunkReadAt{
 		chunkViews:    chunkViews,
 		fileSize:      fileSize,
-		readerCache:   newReaderCache(32, chunkCache, lookupFn),
+		readerCache:   readerCache,
 		readerPattern: NewReaderPattern(),
 	}
 }
@@ -108,44 +106,58 @@ func (c *ChunkReadAt) ReadAt(p []byte, offset int64) (n int, err error) {

 	c.readerPattern.MonitorReadAt(offset, len(p))

-	c.readerLock.Lock()
-	defer c.readerLock.Unlock()
+	c.chunkViews.Lock.Lock()
+	defer c.chunkViews.Lock.Unlock()
+
+	// glog.V(4).Infof("ReadAt [%d,%d) of total file size %d bytes %d chunk views", offset, offset+int64(len(p)), c.fileSize, len(c.chunkViews))
+	n, _, err = c.doReadAt(p, offset)
+	return
+}
+
+func (c *ChunkReadAt) ReadAtWithTime(p []byte, offset int64) (n int, ts int64, err error) {
+
+	c.readerPattern.MonitorReadAt(offset, len(p))
+
+	c.chunkViews.Lock.Lock()
+	defer c.chunkViews.Lock.Unlock()

 	// glog.V(4).Infof("ReadAt [%d,%d) of total file size %d bytes %d chunk views", offset, offset+int64(len(p)), c.fileSize, len(c.chunkViews))
 	return c.doReadAt(p, offset)
 }

-func (c *ChunkReadAt) doReadAt(p []byte, offset int64) (n int, err error) {
+func (c *ChunkReadAt) doReadAt(p []byte, offset int64) (n int, ts int64, err error) {

 	startOffset, remaining := offset, int64(len(p))
-	var nextChunks []*ChunkView
-	for i, chunk := range c.chunkViews {
+	var nextChunks *Interval[*ChunkView]
+	for x := c.chunkViews.Front(); x != nil; x = x.Next {
+		chunk := x.Value
 		if remaining <= 0 {
 			break
 		}
-		if i+1 < len(c.chunkViews) {
-			nextChunks = c.chunkViews[i+1:]
+		if x.Next != nil {
+			nextChunks = x.Next
 		}
-		if startOffset < chunk.LogicOffset {
-			gap := chunk.LogicOffset - startOffset
-			glog.V(4).Infof("zero [%d,%d)", startOffset, chunk.LogicOffset)
+		if startOffset < chunk.ViewOffset {
+			gap := chunk.ViewOffset - startOffset
+			glog.V(4).Infof("zero [%d,%d)", startOffset, chunk.ViewOffset)
 			n += zero(p, startOffset-offset, gap)
-			startOffset, remaining = chunk.LogicOffset, remaining-gap
+			startOffset, remaining = chunk.ViewOffset, remaining-gap
 			if remaining <= 0 {
 				break
 			}
 		}
-		// fmt.Printf(">>> doReadAt [%d,%d), chunk[%d,%d)\n", offset, offset+int64(len(p)), chunk.LogicOffset, chunk.LogicOffset+int64(chunk.Size))
-		chunkStart, chunkStop := max(chunk.LogicOffset, startOffset), min(chunk.LogicOffset+int64(chunk.Size), startOffset+remaining)
+		// fmt.Printf(">>> doReadAt [%d,%d), chunk[%d,%d)\n", offset, offset+int64(len(p)), chunk.ViewOffset, chunk.ViewOffset+int64(chunk.ViewSize))
+		chunkStart, chunkStop := max(chunk.ViewOffset, startOffset), min(chunk.ViewOffset+int64(chunk.ViewSize), startOffset+remaining)
 		if chunkStart >= chunkStop {
 			continue
 		}
-		// glog.V(4).Infof("read [%d,%d), %d/%d chunk %s [%d,%d)", chunkStart, chunkStop, i, len(c.chunkViews), chunk.FileId, chunk.LogicOffset-chunk.Offset, chunk.LogicOffset-chunk.Offset+int64(chunk.Size))
-		bufferOffset := chunkStart - chunk.LogicOffset + chunk.Offset
+		// glog.V(4).Infof("read [%d,%d), %d/%d chunk %s [%d,%d)", chunkStart, chunkStop, i, len(c.chunkViews), chunk.FileId, chunk.ViewOffset-chunk.Offset, chunk.ViewOffset-chunk.Offset+int64(chunk.ViewSize))
+		bufferOffset := chunkStart - chunk.ViewOffset + chunk.OffsetInChunk
+		ts = chunk.ModifiedTsNs
 		copied, err := c.readChunkSliceAt(p[startOffset-offset:chunkStop-chunkStart+startOffset-offset], chunk, nextChunks, uint64(bufferOffset))
 		if err != nil {
 			glog.Errorf("fetching chunk %+v: %v\n", chunk, err)
-			return copied, err
+			return copied, ts, err
 		}

 		n += copied
@@ -177,7 +189,7 @@ func (c *ChunkReadAt) doReadAt(p []byte, offset int64) (n int, err error) {

 }

-func (c *ChunkReadAt) readChunkSliceAt(buffer []byte, chunkView *ChunkView, nextChunkViews []*ChunkView, offset uint64) (n int, err error) {
+func (c *ChunkReadAt) readChunkSliceAt(buffer []byte, chunkView *ChunkView, nextChunkViews *Interval[*ChunkView], offset uint64) (n int, err error) {

 	if c.readerPattern.IsRandomMode() {
 		n, err := c.readerCache.chunkCache.ReadChunkAt(buffer, chunkView.FileId, offset)
@@ -187,16 +199,14 @@ func (c *ChunkReadAt) readChunkSliceAt(buffer []byte, chunkView *ChunkView, next
 		return fetchChunkRange(buffer, c.readerCache.lookupFileIdFn, chunkView.FileId, chunkView.CipherKey, chunkView.IsGzipped, int64(offset))
 	}

-	n, err = c.readerCache.ReadChunkAt(buffer, chunkView.FileId, chunkView.CipherKey, chunkView.IsGzipped, int64(offset), int(chunkView.ChunkSize), chunkView.LogicOffset == 0)
+	n, err = c.readerCache.ReadChunkAt(buffer, chunkView.FileId, chunkView.CipherKey, chunkView.IsGzipped, int64(offset), int(chunkView.ChunkSize), chunkView.ViewOffset == 0)
 	if c.lastChunkFid != chunkView.FileId {
-		if chunkView.Offset == 0 { // start of a new chunk
+		if chunkView.OffsetInChunk == 0 { // start of a new chunk
 			if c.lastChunkFid != "" {
 				c.readerCache.UnCache(c.lastChunkFid)
-				c.readerCache.MaybeCache(nextChunkViews)
-			} else {
-				if len(nextChunkViews) >= 1 {
-					c.readerCache.MaybeCache(nextChunkViews[:1]) // just read the next chunk if at the very beginning
-				}
+			}
+			if nextChunkViews != nil {
+				c.readerCache.MaybeCache(nextChunkViews) // just read the next chunk if at the very beginning
 			}
 		}
 	}
@@ -5,7 +5,6 @@ import (
 	"io"
 	"math"
 	"strconv"
-	"sync"
 	"testing"
 )

@@ -34,44 +33,42 @@ func (m *mockChunkCache) SetChunk(fileId string, data []byte) {

 func TestReaderAt(t *testing.T) {

-	visibles := []VisibleInterval{
-		{
-			start:     1,
-			stop:      2,
-			fileId:    "1",
-			chunkSize: 9,
-		},
-		{
-			start:     3,
-			stop:      4,
-			fileId:    "3",
-			chunkSize: 1,
-		},
-		{
-			start:     5,
-			stop:      6,
-			fileId:    "5",
-			chunkSize: 2,
-		},
-		{
-			start:     7,
-			stop:      9,
-			fileId:    "7",
-			chunkSize: 2,
-		},
-		{
-			start:     9,
-			stop:      10,
-			fileId:    "9",
-			chunkSize: 2,
-		},
-	}
+	visibles := NewIntervalList[*VisibleInterval]()
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:     1,
+		stop:      2,
+		fileId:    "1",
+		chunkSize: 9,
+	})
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:     3,
+		stop:      4,
+		fileId:    "3",
+		chunkSize: 1,
+	})
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:     5,
+		stop:      6,
+		fileId:    "5",
+		chunkSize: 2,
+	})
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:     7,
+		stop:      9,
+		fileId:    "7",
+		chunkSize: 2,
+	})
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:     9,
+		stop:      10,
+		fileId:    "9",
+		chunkSize: 2,
+	})

 	readerAt := &ChunkReadAt{
 		chunkViews:    ViewFromVisibleIntervals(visibles, 0, math.MaxInt64),
-		readerLock:    sync.Mutex{},
 		fileSize:      10,
-		readerCache:   newReaderCache(3, &mockChunkCache{}, nil),
+		readerCache:   NewReaderCache(3, &mockChunkCache{}, nil),
 		readerPattern: NewReaderPattern(),
 	}

@@ -86,7 +83,7 @@ func testReadAt(t *testing.T, readerAt *ChunkReadAt, offset int64, size int, exp
 	if data == nil {
 		data = make([]byte, size)
 	}
-	n, err := readerAt.doReadAt(data, offset)
+	n, _, err := readerAt.doReadAt(data, offset)

 	if expectedN != n {
 		t.Errorf("unexpected read size: %d, expect: %d", n, expectedN)
@@ -101,26 +98,24 @@ func testReadAt(t *testing.T, readerAt *ChunkReadAt, offset int64, size int, exp

 func TestReaderAt0(t *testing.T) {

-	visibles := []VisibleInterval{
-		{
-			start:     2,
-			stop:      5,
-			fileId:    "1",
-			chunkSize: 9,
-		},
-		{
-			start:     7,
-			stop:      9,
-			fileId:    "2",
-			chunkSize: 9,
-		},
-	}
+	visibles := NewIntervalList[*VisibleInterval]()
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:     2,
+		stop:      5,
+		fileId:    "1",
+		chunkSize: 9,
+	})
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:     7,
+		stop:      9,
+		fileId:    "2",
+		chunkSize: 9,
+	})

 	readerAt := &ChunkReadAt{
 		chunkViews:    ViewFromVisibleIntervals(visibles, 0, math.MaxInt64),
-		readerLock:    sync.Mutex{},
 		fileSize:      10,
-		readerCache:   newReaderCache(3, &mockChunkCache{}, nil),
+		readerCache:   NewReaderCache(3, &mockChunkCache{}, nil),
 		readerPattern: NewReaderPattern(),
 	}

@@ -135,20 +130,18 @@ func TestReaderAt0(t *testing.T) {

 func TestReaderAt1(t *testing.T) {

-	visibles := []VisibleInterval{
-		{
-			start:     2,
-			stop:      5,
-			fileId:    "1",
-			chunkSize: 9,
-		},
-	}
+	visibles := NewIntervalList[*VisibleInterval]()
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:     2,
+		stop:      5,
+		fileId:    "1",
+		chunkSize: 9,
+	})

 	readerAt := &ChunkReadAt{
 		chunkViews:    ViewFromVisibleIntervals(visibles, 0, math.MaxInt64),
-		readerLock:    sync.Mutex{},
 		fileSize:      20,
-		readerCache:   newReaderCache(3, &mockChunkCache{}, nil),
+		readerCache:   NewReaderCache(3, &mockChunkCache{}, nil),
 		readerPattern: NewReaderPattern(),
 	}

@@ -164,26 +157,24 @@ func TestReaderAt1(t *testing.T) {
 }

 func TestReaderAtGappedChunksDoNotLeak(t *testing.T) {
-	visibles := []VisibleInterval{
-		{
-			start:     2,
-			stop:      3,
-			fileId:    "1",
-			chunkSize: 5,
-		},
-		{
-			start:     7,
-			stop:      9,
-			fileId:    "1",
-			chunkSize: 4,
-		},
-	}
+	visibles := NewIntervalList[*VisibleInterval]()
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:     2,
+		stop:      3,
+		fileId:    "1",
+		chunkSize: 5,
+	})
+	addVisibleInterval(visibles, &VisibleInterval{
+		start:     7,
+		stop:      9,
+		fileId:    "1",
+		chunkSize: 4,
+	})

 	readerAt := &ChunkReadAt{
 		chunkViews:    ViewFromVisibleIntervals(visibles, 0, math.MaxInt64),
-		readerLock:    sync.Mutex{},
 		fileSize:      9,
-		readerCache:   newReaderCache(3, &mockChunkCache{}, nil),
+		readerCache:   NewReaderCache(3, &mockChunkCache{}, nil),
 		readerPattern: NewReaderPattern(),
 	}

@@ -193,10 +184,9 @@ func TestReaderAtGappedChunksDoNotLeak(t *testing.T) {

 func TestReaderAtSparseFileDoesNotLeak(t *testing.T) {
 	readerAt := &ChunkReadAt{
-		chunkViews:    ViewFromVisibleIntervals([]VisibleInterval{}, 0, math.MaxInt64),
-		readerLock:    sync.Mutex{},
+		chunkViews:    ViewFromVisibleIntervals(NewIntervalList[*VisibleInterval](), 0, math.MaxInt64),
 		fileSize:      3,
-		readerCache:   newReaderCache(3, &mockChunkCache{}, nil),
+		readerCache:   NewReaderCache(3, &mockChunkCache{}, nil),
 		readerPattern: NewReaderPattern(),
 	}

@@ -34,7 +34,7 @@ type SingleChunkCacher struct {
 	completedTimeNew int64
 }

-func newReaderCache(limit int, chunkCache chunk_cache.ChunkCache, lookupFileIdFn wdclient.LookupFileIdFunctionType) *ReaderCache {
+func NewReaderCache(limit int, chunkCache chunk_cache.ChunkCache, lookupFileIdFn wdclient.LookupFileIdFunctionType) *ReaderCache {
 	return &ReaderCache{
 		limit:          limit,
 		chunkCache:     chunkCache,
@@ -43,7 +43,7 @@ func newReaderCache(limit int, chunkCache chunk_cache.ChunkCache, lookupFileIdFn
 	}
 }

-func (rc *ReaderCache) MaybeCache(chunkViews []*ChunkView) {
+func (rc *ReaderCache) MaybeCache(chunkViews *Interval[*ChunkView]) {
 	if rc.lookupFileIdFn == nil {
 		return
 	}
@@ -55,7 +55,8 @@ func (rc *ReaderCache) MaybeCache(chunkViews []*ChunkView) {
 		return
 	}

-	for _, chunkView := range chunkViews {
+	for x := chunkViews; x != nil; x = x.Next {
+		chunkView := x.Value
 		if _, found := rc.downloaders[chunkView.FileId]; found {
 			continue
 		}
@@ -65,7 +66,7 @@ func (rc *ReaderCache) MaybeCache(chunkViews []*ChunkView) {
 			return
 		}

-		// glog.V(4).Infof("prefetch %s offset %d", chunkView.FileId, chunkView.LogicOffset)
+		// glog.V(4).Infof("prefetch %s offset %d", chunkView.FileId, chunkView.ViewOffset)
 		// cache this chunk if not yet
 		cacher := newSingleChunkCacher(rc, chunkView.FileId, chunkView.CipherKey, chunkView.IsGzipped, int(chunkView.ChunkSize), false)
 		go cacher.startCaching()
@@ -207,7 +208,7 @@ func (s *SingleChunkCacher) readChunkAt(buf []byte, offset int64) (int, error) {
 		return 0, s.err
 	}

-	if len(s.data) == 0 {
+	if len(s.data) <= int(offset) {
 		return 0, nil
 	}

@@ -56,7 +56,7 @@ func (store *UniversalRedisStore) doInsertEntry(ctx context.Context, entry *file
 		return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err)
 	}

-	if len(entry.Chunks) > filer.CountEntryChunksForGzip {
+	if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
 		value = util.MaybeGzipData(value)
 	}

@@ -71,7 +71,7 @@ func (store *UniversalRedis2Store) doInsertEntry(ctx context.Context, entry *fil
 		return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err)
 	}

-	if len(entry.Chunks) > filer.CountEntryChunksForGzip {
+	if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
 		value = util.MaybeGzipData(value)
 	}

@@ -56,7 +56,7 @@ func (store *UniversalRedis3Store) doInsertEntry(ctx context.Context, entry *fil
 		return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err)
 	}

-	if len(entry.Chunks) > filer.CountEntryChunksForGzip {
+	if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
 		value = util.MaybeGzipData(value)
 	}

@@ -53,7 +53,7 @@ func (store *UniversalRedisLuaStore) InsertEntry(ctx context.Context, entry *fil
 		return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err)
 	}

-	if len(entry.Chunks) > filer.CountEntryChunksForGzip {
+	if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
 		value = util.MaybeGzipData(value)
 	}

@@ -11,7 +11,7 @@ import (

 func ReadMountMappings(grpcDialOption grpc.DialOption, filerAddress pb.ServerAddress) (mappings *remote_pb.RemoteStorageMapping, readErr error) {
 	var oldContent []byte
-	if readErr = pb.WithFilerClient(false, filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	if readErr = pb.WithFilerClient(false, 0, filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		oldContent, readErr = ReadInsideFiler(client, DirectoryEtcRemote, REMOTE_STORAGE_MOUNT_FILE)
 		return readErr
 	}); readErr != nil {
@@ -133,7 +133,7 @@ func UnmarshalRemoteStorageMappings(oldContent []byte) (mappings *remote_pb.Remo

 func ReadRemoteStorageConf(grpcDialOption grpc.DialOption, filerAddress pb.ServerAddress, storageName string) (conf *remote_pb.RemoteConf, readErr error) {
 	var oldContent []byte
-	if readErr = pb.WithFilerClient(false, filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	if readErr = pb.WithFilerClient(false, 0, filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		oldContent, readErr = ReadInsideFiler(client, DirectoryEtcRemote, storageName+REMOTE_STORAGE_CONF_SUFFIX)
 		return readErr
 	}); readErr != nil {
@@ -108,7 +108,7 @@ func (store *RocksDBStore) InsertEntry(ctx context.Context, entry *filer.Entry)
 		return fmt.Errorf("persisting %s : %v", entry.FullPath, err)
 	}

-	// println("saved", entry.FullPath, "chunks", len(entry.Chunks))
+	// println("saved", entry.FullPath, "chunks", len(entry.GetChunks()))

 	return nil
 }
@@ -140,7 +140,7 @@ func (store *RocksDBStore) FindEntry(ctx context.Context, fullpath weed_util.Ful
 		return entry, fmt.Errorf("decode %s : %v", entry.FullPath, err)
 	}

-	// println("read", entry.FullPath, "chunks", len(entry.Chunks), "data", len(data), string(data))
+	// println("read", entry.FullPath, "chunks", len(entry.GetChunks()), "data", len(data), string(data))

 	return entry, nil
 }
@@ -259,7 +259,7 @@ func (store *RocksDBStore) ListDirectoryPrefixedEntries(ctx context.Context, dir
 		}
 		lastFileName = fileName

-		// println("list", entry.FullPath, "chunks", len(entry.Chunks))
+		// println("list", entry.FullPath, "chunks", len(entry.GetChunks()))
 		if decodeErr := entry.DecodeAttributesAndChunks(value); decodeErr != nil {
 			err = decodeErr
 			glog.V(0).Infof("list %s : %v", entry.FullPath, err)
@@ -6,7 +6,6 @@ import (
 	"golang.org/x/exp/slices"
 	"io"
 	"math"
-	"sort"
 	"strings"
 	"sync"
 	"time"
@@ -30,7 +29,7 @@ func HasData(entry *filer_pb.Entry) bool {
 		return true
 	}

-	return len(entry.Chunks) > 0
+	return len(entry.GetChunks()) > 0
 }

 func IsSameData(a, b *filer_pb.Entry) bool {
@@ -64,7 +63,7 @@ func NewFileReader(filerClient filer_pb.FilerClient, entry *filer_pb.Entry) io.R
 	if len(entry.Content) > 0 {
 		return bytes.NewReader(entry.Content)
 	}
-	return NewChunkStreamReader(filerClient, entry.Chunks)
+	return NewChunkStreamReader(filerClient, entry.GetChunks())
 }

 func StreamContent(masterClient wdclient.HasLookupFileIdFunction, writer io.Writer, chunks []*filer_pb.FileChunk, offset int64, size int64) error {
@@ -78,7 +77,8 @@ func StreamContentWithThrottler(masterClient wdclient.HasLookupFileIdFunction, w

 	fileId2Url := make(map[string][]string)

-	for _, chunkView := range chunkViews {
+	for x := chunkViews.Front(); x != nil; x = x.Next {
+		chunkView := x.Value
 		var urlStrings []string
 		var err error
 		for _, backoff := range getLookupFileIdBackoffSchedule {
@@ -102,29 +102,30 @@ func StreamContentWithThrottler(masterClient wdclient.HasLookupFileIdFunction, w

 	downloadThrottler := util.NewWriteThrottler(downloadMaxBytesPs)
 	remaining := size
-	for _, chunkView := range chunkViews {
-		if offset < chunkView.LogicOffset {
-			gap := chunkView.LogicOffset - offset
+	for x := chunkViews.Front(); x != nil; x = x.Next {
+		chunkView := x.Value
+		if offset < chunkView.ViewOffset {
+			gap := chunkView.ViewOffset - offset
 			remaining -= gap
-			glog.V(4).Infof("zero [%d,%d)", offset, chunkView.LogicOffset)
+			glog.V(4).Infof("zero [%d,%d)", offset, chunkView.ViewOffset)
 			err := writeZero(writer, gap)
 			if err != nil {
-				return fmt.Errorf("write zero [%d,%d)", offset, chunkView.LogicOffset)
+				return fmt.Errorf("write zero [%d,%d)", offset, chunkView.ViewOffset)
 			}
-			offset = chunkView.LogicOffset
+			offset = chunkView.ViewOffset
 		}
 		urlStrings := fileId2Url[chunkView.FileId]
 		start := time.Now()
-		err := retriedStreamFetchChunkData(writer, urlStrings, chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.Offset, int(chunkView.Size))
-		offset += int64(chunkView.Size)
-		remaining -= int64(chunkView.Size)
+		err := retriedStreamFetchChunkData(writer, urlStrings, chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.OffsetInChunk, int(chunkView.ViewSize))
+		offset += int64(chunkView.ViewSize)
+		remaining -= int64(chunkView.ViewSize)
 		stats.FilerRequestHistogram.WithLabelValues("chunkDownload").Observe(time.Since(start).Seconds())
 		if err != nil {
 			stats.FilerRequestCounter.WithLabelValues("chunkDownloadError").Inc()
 			return fmt.Errorf("read chunk: %v", err)
 		}
 		stats.FilerRequestCounter.WithLabelValues("chunkDownload").Inc()
-		downloadThrottler.MaybeSlowdown(int64(chunkView.Size))
+		downloadThrottler.MaybeSlowdown(int64(chunkView.ViewSize))
 	}
 	if remaining > 0 {
 		glog.V(4).Infof("zero [%d,%d)", offset, offset+remaining)
@@ -167,14 +168,15 @@ func ReadAll(buffer []byte, masterClient *wdclient.MasterClient, chunks []*filer

 	idx := 0

-	for _, chunkView := range chunkViews {
+	for x := chunkViews.Front(); x != nil; x = x.Next {
+		chunkView := x.Value
 		urlStrings, err := lookupFileIdFn(chunkView.FileId)
 		if err != nil {
 			glog.V(1).Infof("operation LookupFileId %s failed, err: %v", chunkView.FileId, err)
 			return err
 		}

-		n, err := retriedFetchChunkData(buffer[idx:idx+int(chunkView.Size)], urlStrings, chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.Offset)
+		n, err := retriedFetchChunkData(buffer[idx:idx+int(chunkView.ViewSize)], urlStrings, chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.OffsetInChunk)
 		if err != nil {
 			return err
 		}
@@ -185,7 +187,8 @@ func ReadAll(buffer []byte, masterClient *wdclient.MasterClient, chunks []*filer

 // ----------------  ChunkStreamReader ----------------------------------
 type ChunkStreamReader struct {
-	chunkViews   []*ChunkView
+	head         *Interval[*ChunkView]
+	chunkView    *Interval[*ChunkView]
 	totalSize    int64
 	logicOffset  int64
 	buffer       []byte
@@ -201,17 +204,16 @@ var _ = io.ReaderAt(&ChunkStreamReader{})
 func doNewChunkStreamReader(lookupFileIdFn wdclient.LookupFileIdFunctionType, chunks []*filer_pb.FileChunk) *ChunkStreamReader {

 	chunkViews := ViewFromChunks(lookupFileIdFn, chunks, 0, math.MaxInt64)
-	slices.SortFunc(chunkViews, func(a, b *ChunkView) bool {
-		return a.LogicOffset < b.LogicOffset
-	})

 	var totalSize int64
-	for _, chunk := range chunkViews {
-		totalSize += int64(chunk.Size)
+	for x := chunkViews.Front(); x != nil; x = x.Next {
+		chunk := x.Value
+		totalSize += int64(chunk.ViewSize)
 	}

 	return &ChunkStreamReader{
-		chunkViews:   chunkViews,
+		head:         chunkViews.Front(),
+		chunkView:    chunkViews.Front(),
 		lookupFileId: lookupFileIdFn,
 		totalSize:    totalSize,
 	}
@@ -290,7 +292,7 @@ func (c *ChunkStreamReader) Seek(offset int64, whence int) (int64, error) {
 }

 func insideChunk(offset int64, chunk *ChunkView) bool {
-	return chunk.LogicOffset <= offset && offset < chunk.LogicOffset+int64(chunk.Size)
+	return chunk.ViewOffset <= offset && offset < chunk.ViewOffset+int64(chunk.ViewSize)
 }

 func (c *ChunkStreamReader) prepareBufferFor(offset int64) (err error) {
@@ -300,50 +302,29 @@ func (c *ChunkStreamReader) prepareBufferFor(offset int64) (err error) {
 	}

 	// fmt.Printf("fetch for offset %d\n", offset)
-
-	// need to seek to a different chunk
-	currentChunkIndex := sort.Search(len(c.chunkViews), func(i int) bool {
-		return offset < c.chunkViews[i].LogicOffset
-	})
-	if currentChunkIndex == len(c.chunkViews) {
-		// not found
-		if insideChunk(offset, c.chunkViews[0]) {
-			// fmt.Printf("select0 chunk %d %s\n", currentChunkIndex, c.chunkViews[currentChunkIndex].FileId)
-			currentChunkIndex = 0
-		} else if insideChunk(offset, c.chunkViews[len(c.chunkViews)-1]) {
-			currentChunkIndex = len(c.chunkViews) - 1
-			// fmt.Printf("select last chunk %d %s\n", currentChunkIndex, c.chunkViews[currentChunkIndex].FileId)
-		} else {
-			return io.EOF
-		}
-	} else if currentChunkIndex > 0 {
-		if insideChunk(offset, c.chunkViews[currentChunkIndex]) {
-			// good hit
-		} else if insideChunk(offset, c.chunkViews[currentChunkIndex-1]) {
-			currentChunkIndex -= 1
-			// fmt.Printf("select -1 chunk %d %s\n", currentChunkIndex, c.chunkViews[currentChunkIndex].FileId)
-		} else {
-			// glog.Fatalf("unexpected1 offset %d", offset)
-			return fmt.Errorf("unexpected1 offset %d", offset)
-		}
-	} else {
-		// glog.Fatalf("unexpected2 offset %d", offset)
-		return fmt.Errorf("unexpected2 offset %d", offset)
+	c.chunkView = c.chunkView.Next
+	if c.chunkView == nil {
+		return io.EOF
 	}

 	// positioning within the new chunk
-	chunk := c.chunkViews[currentChunkIndex]
+	chunk := c.chunkView.Value
 	if insideChunk(offset, chunk) {
-		if c.isBufferEmpty() || c.bufferOffset != chunk.LogicOffset {
-			if err = c.fetchChunkToBuffer(chunk); err != nil {
-				return
-			}
+		if c.isBufferEmpty() || c.bufferOffset != chunk.ViewOffset {
+			return c.fetchChunkToBuffer(chunk)
 		}
 	} else {
-		// glog.Fatalf("unexpected3 offset %d in %s [%d,%d)", offset, chunk.FileId, chunk.LogicOffset, chunk.LogicOffset+int64(chunk.Size))
-		return fmt.Errorf("unexpected3 offset %d in %s [%d,%d)", offset, chunk.FileId, chunk.LogicOffset, chunk.LogicOffset+int64(chunk.Size))
+		for p := c.head; p != nil; p = p.Next {
+			chunk = p.Value
+			if insideChunk(offset, chunk) {
+				if c.isBufferEmpty() || c.bufferOffset != chunk.ViewOffset {
+					return c.fetchChunkToBuffer(chunk)
+				}
+			}
+		}
 	}
-	return
+
+	return io.EOF
 }

 func (c *ChunkStreamReader) fetchChunkToBuffer(chunkView *ChunkView) error {
@@ -355,7 +336,7 @@ func (c *ChunkStreamReader) fetchChunkToBuffer(chunkView *ChunkView) error {
 	var buffer bytes.Buffer
 	var shouldRetry bool
 	for _, urlString := range urlStrings {
-		shouldRetry, err = util.ReadUrlAsStream(urlString+"?readDeleted=true", chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.Offset, int(chunkView.Size), func(data []byte) {
+		shouldRetry, err = util.ReadUrlAsStream(urlString+"?readDeleted=true", chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.OffsetInChunk, int(chunkView.ViewSize), func(data []byte) {
 			buffer.Write(data)
 		})
 		if !shouldRetry {
@@ -372,10 +353,10 @@ func (c *ChunkStreamReader) fetchChunkToBuffer(chunkView *ChunkView) error {
 		return err
 	}
 	c.buffer = buffer.Bytes()
-	c.bufferOffset = chunkView.LogicOffset
+	c.bufferOffset = chunkView.ViewOffset
 	c.chunk = chunkView.FileId

-	// glog.V(0).Infof("fetched %s [%d,%d)", chunkView.FileId, chunkView.LogicOffset, chunkView.LogicOffset+int64(chunkView.Size))
+	// glog.V(0).Infof("fetched %s [%d,%d)", chunkView.FileId, chunkView.ViewOffset, chunkView.ViewOffset+int64(chunkView.ViewSize))

 	return nil
 }
@@ -144,7 +144,7 @@ func (store *YdbStore) insertOrUpdateEntry(ctx context.Context, entry *filer.Ent
 		return fmt.Errorf("encode %s: %s", entry.FullPath, err)
 	}

-	if len(entry.Chunks) > filer.CountEntryChunksForGzip {
+	if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
 		meta = util.MaybeGzipData(meta)
 	}
 	tablePathPrefix, shortDir := store.getPrefix(ctx, &dir)
@@ -25,6 +25,7 @@ import (
 	"os"
 	"os/user"
 	"path/filepath"
+	"sort"
 	"strings"
 	"sync"
 	"time"
@@ -32,6 +33,7 @@ import (

 // MaxSize is the maximum size of a log file in bytes.
 var MaxSize uint64 = 1024 * 1024 * 1800
+var MaxFileCount = 5

 // logDirs lists the candidate directories for new log files.
 var logDirs []string
@@ -43,8 +45,9 @@ var logDir = flag.String("logdir", "", "If non-empty, write log files in this di
 func createLogDirs() {
 	if *logDir != "" {
 		logDirs = append(logDirs, *logDir)
+	} else {
+		logDirs = append(logDirs, os.TempDir())
 	}
-	logDirs = append(logDirs, os.TempDir())
 }

 var (
@@ -96,6 +99,15 @@ func logName(tag string, t time.Time) (name, link string) {
 	return name, program + "." + tag
 }

+func prefix(tag string) string {
+	return fmt.Sprintf("%s.%s.%s.log.%s.",
+		program,
+		host,
+		userName,
+		tag,
+	)
+}
+
 var onceLogDirs sync.Once

 // create creates a new log file and returns the file and its filename, which
@@ -108,8 +120,29 @@ func create(tag string, t time.Time) (f *os.File, filename string, err error) {
 		return nil, "", errors.New("log: no log dirs")
 	}
 	name, link := logName(tag, t)
+	logPrefix := prefix(tag)
 	var lastErr error
 	for _, dir := range logDirs {
+
+		// remove old logs
+		entries, _ := os.ReadDir(dir)
+		var previousLogs []string
+		for _, entry := range entries {
+			if strings.HasPrefix(entry.Name(), logPrefix) {
+				previousLogs = append(previousLogs, entry.Name())
+			}
+		}
+		if len(previousLogs) >= MaxFileCount {
+			sort.Strings(previousLogs)
+			for i, entry := range previousLogs {
+				if i > len(previousLogs)-MaxFileCount {
+					break
+				}
+				os.Remove(filepath.Join(dir, entry))
+			}
+		}
+
+		// create new log file
 		fname := filepath.Join(dir, name)
 		f, err := os.Create(fname)
 		if err == nil {
@@ -77,7 +77,7 @@ func (iama *IamApiServer) registerRouter(router *mux.Router) {

 func (iam IamS3ApiConfigure) GetS3ApiConfiguration(s3cfg *iam_pb.S3ApiConfiguration) (err error) {
 	var buf bytes.Buffer
-	err = pb.WithGrpcFilerClient(false, iam.option.Filer, iam.option.GrpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	err = pb.WithGrpcFilerClient(false, 0, iam.option.Filer, iam.option.GrpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		if err = filer.ReadEntry(iam.masterClient, client, filer.IamConfigDirectory, filer.IamIdentityFile, &buf); err != nil {
 			return err
 		}
@@ -99,7 +99,7 @@ func (iam IamS3ApiConfigure) PutS3ApiConfiguration(s3cfg *iam_pb.S3ApiConfigurat
 	if err := filer.ProtoToText(&buf, s3cfg); err != nil {
 		return fmt.Errorf("ProtoToText: %s", err)
 	}
-	return pb.WithGrpcFilerClient(false, iam.option.Filer, iam.option.GrpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	return pb.WithGrpcFilerClient(false, 0, iam.option.Filer, iam.option.GrpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		err = util.Retry("saveIamIdentity", func() error {
 			return filer.SaveInsideFiler(client, filer.IamConfigDirectory, filer.IamIdentityFile, buf.Bytes())
 		})
@@ -112,7 +112,7 @@ func (iam IamS3ApiConfigure) PutS3ApiConfiguration(s3cfg *iam_pb.S3ApiConfigurat

 func (iam IamS3ApiConfigure) GetPolicies(policies *Policies) (err error) {
 	var buf bytes.Buffer
-	err = pb.WithGrpcFilerClient(false, iam.option.Filer, iam.option.GrpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	err = pb.WithGrpcFilerClient(false, 0, iam.option.Filer, iam.option.GrpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		if err = filer.ReadEntry(iam.masterClient, client, filer.IamConfigDirectory, filer.IamPoliciesFile, &buf); err != nil {
 			return err
 		}
@@ -136,7 +136,7 @@ func (iam IamS3ApiConfigure) PutPolicies(policies *Policies) (err error) {
 	if b, err = json.Marshal(policies); err != nil {
 		return err
 	}
-	return pb.WithGrpcFilerClient(false, iam.option.Filer, iam.option.GrpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+	return pb.WithGrpcFilerClient(false, 0, iam.option.Filer, iam.option.GrpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		if err := filer.SaveInsideFiler(client, filer.IamConfigDirectory, filer.IamPoliciesFile, b); err != nil {
 			return err
 		}
@@ -0,0 +1,47 @@
+package images
+
+import (
+	"bytes"
+	"image"
+	"image/gif"
+	"image/jpeg"
+	"image/png"
+	"io"
+
+	"github.com/disintegration/imaging"
+
+	"github.com/seaweedfs/seaweedfs/weed/glog"
+)
+
+func Cropped(ext string, read io.ReadSeeker, x1, y1, x2, y2 int) (cropped io.ReadSeeker, err error) {
+	srcImage, _, err := image.Decode(read)
+	if err != nil {
+		glog.Error(err)
+		return read, err
+	}
+
+	bounds := srcImage.Bounds()
+	if x2 > bounds.Dx() || y2 > bounds.Dy() {
+		read.Seek(0, 0)
+		return read, nil
+	}
+
+	rectangle := image.Rect(x1, y1, x2, y2)
+	dstImage := imaging.Crop(srcImage, rectangle)
+	var buf bytes.Buffer
+	switch ext {
+	case ".jpg", ".jpeg":
+		if err = jpeg.Encode(&buf, dstImage, nil); err != nil {
+			glog.Error(err)
+		}
+	case ".png":
+		if err = png.Encode(&buf, dstImage); err != nil {
+			glog.Error(err)
+		}
+	case ".gif":
+		if err = gif.Encode(&buf, dstImage, nil); err != nil {
+			glog.Error(err)
+		}
+	}
+	return bytes.NewReader(buf.Bytes()), err
+}
--- a/Show More
+++ b/Show More