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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2013/08/28 21:34:55 UTC

[jira] [Commented] (HBASE-9365) Optionally limit major compactions to off peak hours

    [ https://issues.apache.org/jira/browse/HBASE-9365?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13752766#comment-13752766 ] 

stack commented on HBASE-9365:
------------------------------

Is this facility out in the fb branch?
                
> Optionally limit major compactions to off peak hours
> ----------------------------------------------------
>
>                 Key: HBASE-9365
>                 URL: https://issues.apache.org/jira/browse/HBASE-9365
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>
> We already have off peak hours (where we set a more aggressive compaction ratio) and periodic major compactions.
> It would be nice if we could limit this to off peak hours as well.
> A major compaction can be triggered in three ways:
> # a periodic chore checking every ~3h (10.000.000ms) by default
> # a minor compaction promoted to major because the last major compaction was too long ago
> # a minor compaction promoted to major (at the HStore level), because it touched all HFiles anyway
> For case #1 and #2 we could could optionally return false from Store.isMajorCompaction(...) when we're not in the off peak window. Would have a new config option to enforce that only optionally.
> In case #3 we're compacting all files anyway, so not need to interfere with that.
> Thoughts?

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