Avoid unnecessary persistence of retention leases #42299
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Today we are persisting the retention leases at least every thirty seconds by a scheduled background sync. This sync causes an fsync to disk and when there are a large number of shards allocated to slow disks, these fsyncs can pile up and can severely impact the system. This commit addresses this by only persisting and fsyncing the retention leases if they have changed since the last time that we persisted and fsynced the retention leases.
jasontedor
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>bug
:Distributed Indexing/Distributed
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Pinging @elastic/es-distributed |
…retention-lease-persistence * elastic/master: Mute all ml_datafeed_crud rolling upgrade tests
jasontedor
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May 21, 2019
Today we are persisting the retention leases at least every thirty seconds by a scheduled background sync. This sync causes an fsync to disk and when there are a large number of shards allocated to slow disks, these fsyncs can pile up and can severely impact the system. This commit addresses this by only persisting and fsyncing the retention leases if they have changed since the last time that we persisted and fsynced the retention leases.
jasontedor
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May 21, 2019
Today we are persisting the retention leases at least every thirty seconds by a scheduled background sync. This sync causes an fsync to disk and when there are a large number of shards allocated to slow disks, these fsyncs can pile up and can severely impact the system. This commit addresses this by only persisting and fsyncing the retention leases if they have changed since the last time that we persisted and fsynced the retention leases.
jasontedor
added a commit
that referenced
this pull request
May 21, 2019
Today we are persisting the retention leases at least every thirty seconds by a scheduled background sync. This sync causes an fsync to disk and when there are a large number of shards allocated to slow disks, these fsyncs can pile up and can severely impact the system. This commit addresses this by only persisting and fsyncing the retention leases if they have changed since the last time that we persisted and fsynced the retention leases.
jasontedor
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May 21, 2019
* master: (176 commits) Avoid unnecessary persistence of retention leases (elastic#42299) [ML][TEST] Fix limits in AutodetectMemoryLimitIT (elastic#42279) [ML Data Frame] Persist and restore checkpoint and position (elastic#41942) mute failing filerealm hash caching tests (elastic#42304) Safer Wait for Snapshot Success in ClusterPrivilegeTests (elastic#40943) Remove 7.0.2 (elastic#42282) Revert "Remove 7.0.2 (elastic#42282)" [DOCS] Copied note on slicing support to Slicing section. Closes 26114 (elastic#40426) Remove 7.0.2 (elastic#42282) Mute all ml_datafeed_crud rolling upgrade tests Move the FIPS configuration back to the build plugin (elastic#41989) Remove stray back tick that's messing up table format (elastic#41705) Add missing comma in code section (elastic#41678) add 7.1.1 and 6.8.1 versions (elastic#42253) Use spearate testkit dir for each run (elastic#42013) Add experimental and warnings to vector functions (elastic#42205) Fix version in tests since elastic#41906 was merged Bump version in BWC check after backport Prevent in-place downgrades and invalid upgrades (elastic#41731) Mute date_histo interval bwc test ...
jasontedor
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May 22, 2019
* master: (82 commits) Fix off-by-one error in an index shard test Cleanup Redundant BlobStoreFormat Class (elastic#42195) remove backcompat handling of 6.2.x versions (elastic#42044) Mute testDelayedOperationsBeforeAndAfterRelocated Execute actions under permit in primary mode only (elastic#42241) Mute another transforms_stats yaml test Deprecate support for chained multi-fields. (elastic#41926) Mute transforms_stats yaml test Make unwrapCorrupt Check Suppressed Ex. (elastic#41889) Remove Dead Code from Azure Repo Plugin (elastic#42178) Reorganize Painless doc structure (elastic#42303) Avoid unnecessary persistence of retention leases (elastic#42299) [ML][TEST] Fix limits in AutodetectMemoryLimitIT (elastic#42279) [ML Data Frame] Persist and restore checkpoint and position (elastic#41942) mute failing filerealm hash caching tests (elastic#42304) Safer Wait for Snapshot Success in ClusterPrivilegeTests (elastic#40943) Remove 7.0.2 (elastic#42282) Revert "Remove 7.0.2 (elastic#42282)" [DOCS] Copied note on slicing support to Slicing section. Closes 26114 (elastic#40426) Remove 7.0.2 (elastic#42282) ...
gurkankaymak
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May 27, 2019
Today we are persisting the retention leases at least every thirty seconds by a scheduled background sync. This sync causes an fsync to disk and when there are a large number of shards allocated to slow disks, these fsyncs can pile up and can severely impact the system. This commit addresses this by only persisting and fsyncing the retention leases if they have changed since the last time that we persisted and fsynced the retention leases.
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A user in the discussion forum noticed increased write activity after reindexing some 6.7 indices using a 7.0 cluster and reports that upgrading to 7.1.1 has resolved this. I suspect this PR is what helped. https://discuss.elastic.co/t/increased-disk-writes-on-elasticsearch/182949 |
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Today we are persisting the retention leases at least every thirty seconds by a scheduled background sync. This sync causes an fsync to disk and when there are a large number of shards allocated to slow disks, these fsyncs can pile up and can severely impact the system. This commit addresses this by only persisting and fsyncing the retention leases if they have changed since the last time that we persisted and fsynced the retention leases.