Incremental compaction is not working in cleanup #14035
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raphaelsc
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May 25, 2023
After c7826aa, sstable runs are cleaned up together. The procedure which executes cleanup was holding reference to all input sstables, such that it could later retry the same cleanup job on failure. Turns out it was not taking into account that incremental compaction will exhaust the input set incrementally. Therefore cleanup is affected by the 100% space overhead. To fix it, cleanup will now have the input set updated, by removing the sstables that were already cleaned up. On failure, cleanup will retry the same job with the remaining sstables that weren't exhausted by incremental compaction. New unit test reproduces the failure, and passes with the fix. Fixes scylladb#14035. Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com>
raphaelsc
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May 30, 2023
After c7826aa, sstable runs are cleaned up together. The procedure which executes cleanup was holding reference to all input sstables, such that it could later retry the same cleanup job on failure. Turns out it was not taking into account that incremental compaction will exhaust the input set incrementally. Therefore cleanup is affected by the 100% space overhead. To fix it, cleanup will now have the input set updated, by removing the sstables that were already cleaned up. On failure, cleanup will retry the same job with the remaining sstables that weren't exhausted by incremental compaction. New unit test reproduces the failure, and passes with the fix. Fixes scylladb#14035. Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com>
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@scylladb/scylla-maint please consider backport to 2022.2 + 2023.1 |
denesb
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Jun 6, 2023
After c7826aa, sstable runs are cleaned up together. The procedure which executes cleanup was holding reference to all input sstables, such that it could later retry the same cleanup job on failure. Turns out it was not taking into account that incremental compaction will exhaust the input set incrementally. Therefore cleanup is affected by the 100% space overhead. To fix it, cleanup will now have the input set updated, by removing the sstables that were already cleaned up. On failure, cleanup will retry the same job with the remaining sstables that weren't exhausted by incremental compaction. New unit test reproduces the failure, and passes with the fix. Fixes #14035. Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com> Closes #14038 (cherry picked from commit 23443e0)
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Backported to 5.3. Doesn't apply cleanly to 5.2. @raphaelsc please open backport PRs for 5.2 and 5.1. |
mykaul
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raphaelsc
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Jun 9, 2023
After c7826aa, sstable runs are cleaned up together. The procedure which executes cleanup was holding reference to all input sstables, such that it could later retry the same cleanup job on failure. Turns out it was not taking into account that incremental compaction will exhaust the input set incrementally. Therefore cleanup is affected by the 100% space overhead. To fix it, cleanup will now have the input set updated, by removing the sstables that were already cleaned up. On failure, cleanup will retry the same job with the remaining sstables that weren't exhausted by incremental compaction. New unit test reproduces the failure, and passes with the fix. Fixes scylladb#14035. Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com> Closes scylladb#14038 (cherry picked from commit 23443e0) Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com> Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com>
raphaelsc
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Jun 9, 2023
After c7826aa, sstable runs are cleaned up together. The procedure which executes cleanup was holding reference to all input sstables, such that it could later retry the same cleanup job on failure. Turns out it was not taking into account that incremental compaction will exhaust the input set incrementally. Therefore cleanup is affected by the 100% space overhead. To fix it, cleanup will now have the input set updated, by removing the sstables that were already cleaned up. On failure, cleanup will retry the same job with the remaining sstables that weren't exhausted by incremental compaction. New unit test reproduces the failure, and passes with the fix. Fixes scylladb#14035. Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com> Closes scylladb#14038 (cherry picked from commit 23443e0) Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com> Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com>
raphaelsc
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Jun 9, 2023
After c7826aa, sstable runs are cleaned up together. The procedure which executes cleanup was holding reference to all input sstables, such that it could later retry the same cleanup job on failure. Turns out it was not taking into account that incremental compaction will exhaust the input set incrementally. Therefore cleanup is affected by the 100% space overhead. To fix it, cleanup will now have the input set updated, by removing the sstables that were already cleaned up. On failure, cleanup will retry the same job with the remaining sstables that weren't exhausted by incremental compaction. New unit test reproduces the failure, and passes with the fix. Fixes scylladb#14035. Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com> Closes scylladb#14038 (cherry picked from commit 23443e0) Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com> Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com>
denesb
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Jun 13, 2023
After c7826aa, sstable runs are cleaned up together. The procedure which executes cleanup was holding reference to all input sstables, such that it could later retry the same cleanup job on failure. Turns out it was not taking into account that incremental compaction will exhaust the input set incrementally. Therefore cleanup is affected by the 100% space overhead. To fix it, cleanup will now have the input set updated, by removing the sstables that were already cleaned up. On failure, cleanup will retry the same job with the remaining sstables that weren't exhausted by incremental compaction. New unit test reproduces the failure, and passes with the fix. Fixes #14035. Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com> Closes #14038 (cherry picked from commit 23443e0) Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com> Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com> Closes #14193
denesb
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Jun 13, 2023
After c7826aa, sstable runs are cleaned up together. The procedure which executes cleanup was holding reference to all input sstables, such that it could later retry the same cleanup job on failure. Turns out it was not taking into account that incremental compaction will exhaust the input set incrementally. Therefore cleanup is affected by the 100% space overhead. To fix it, cleanup will now have the input set updated, by removing the sstables that were already cleaned up. On failure, cleanup will retry the same job with the remaining sstables that weren't exhausted by incremental compaction. New unit test reproduces the failure, and passes with the fix. Fixes #14035. Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com> Closes #14038 (cherry picked from commit 23443e0) Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com> Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com> Closes #14195
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5.2 and 5.1 backports are queued. |
denesb
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Backport candidate
backport/5.2
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Since c7826aa, cleanup compacts entire runs, not only the individual fragments. Turns out cleanup is incorrectly holding reference to input runs, meaning incremental compaction cannot release space earlier. So the promise of low temporary space requirement is not hold when running cleanup with ICS.
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