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https://issues.apache.org/jira/browse/HBASE-17912?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ted Yu updated HBASE-17912:
---------------------------
Resolution: Fixed
Hadoop Flags: Reviewed
Fix Version/s: 1.4.0
2.0.0
Status: Resolved (was: Patch Available)
Thanks for the patch, Geoffrey
Thanks for the review, Jerry.
> Avoid major compactions on region server startup
> ------------------------------------------------
>
> Key: HBASE-17912
> URL: https://issues.apache.org/jira/browse/HBASE-17912
> Project: HBase
> Issue Type: Improvement
> Components: Compaction
> Affects Versions: 2.0.0, 1.3.1, 0.98.24
> Reporter: Geoffrey Jacoby
> Assignee: Geoffrey Jacoby
> Fix For: 2.0.0, 1.4.0
>
> Attachments: HBASE-17912.patch
>
>
> The HRegionServer.CompactionChecker chore wakes up every 10s and for each
> store in each region mods against a chore frequency (by default slightly
> under 3 hours) to see if it's time to check if a major compaction is
> necessary for that store.
> The check to see if it needs to check for major compactions is calculated by
> if (iteration % multiplier != 0) continue;
> where iteration is the number of times the chore has woken up.
> Because 0 % anything is 0, this will always check for necessary major
> compactions on each store when this chore is first run after the region
> server starts up. This can result in compaction storms when doing a rolling
> restart, because, for example, the new instance of the region server might
> get a lower jitter value than the old one had.
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