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https://issues.apache.org/jira/browse/HBASE-5332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13210751#comment-13210751
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Lars Hofhansl commented on HBASE-5332:
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I kinda like the "simpleness" of the random jitter. Part of the problem seems
to be that we only get a few random choices with "delay + jitter*(1 -
2*Math.random())"
What if we just change this to "delay + jitter*(2 - 4*Math.random())" or "delay
+ jitter*(3 - 6*Math.random())" and decrease jitter accordingly?
> Deterministic Compaction Jitter
> -------------------------------
>
> Key: HBASE-5332
> URL: https://issues.apache.org/jira/browse/HBASE-5332
> Project: HBase
> Issue Type: Improvement
> Reporter: Nicolas Spiegelberg
> Assignee: Nicolas Spiegelberg
> Priority: Minor
> Attachments: D1785.1.patch, D1785.2.patch
>
>
> Currently, we add jitter to a compaction using "delay + jitter*(1 -
> 2*Math.random())". Since this is non-deterministic, we can get major
> compaction storms on server restart as half the Stores that were set to
> "delay + jitter" will now be set to "delay - jitter". We need a more
> deterministic way to jitter major compactions so this information can persist
> across server restarts.
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