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https://issues.apache.org/jira/browse/HBASE-5332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13211642#comment-13211642
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Nicolas Spiegelberg commented on HBASE-5332:
--------------------------------------------
@Lars: note that the operation you describe is operating on a double and
converting to a long at the end, so there is no loss of granularity. Also note
that the other proposed changes would 2x and 3x the jitter from the
user-configured percentage value.
> 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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