[jira] [Created] (HBASE-19646) Add CRON To Major Compaction

["BELUGA BEHR (JIRA)" <ji...@apache.org>]

BELUGA BEHR created HBASE-19646:
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             Summary: Add CRON To Major Compaction
                 Key: HBASE-19646
                 URL: https://issues.apache.org/jira/browse/HBASE-19646
             Project: HBase
          Issue Type: Bug
          Components: Compaction
            Reporter: BELUGA BEHR
            Priority: Minor


HBase provides _hbase.hregion.majorcompaction_ 

{quote}
Time between major compactions, expressed in milliseconds. Set to 0 to disable time-based automatic major compactions. User-requested and size-based major compactions will still run. This value is multiplied by hbase.hregion.majorcompaction.jitter to cause compaction to start at a somewhat-random time during a given window of time. The default value is 7 days, expressed in milliseconds. If major compactions are causing disruption in your environment, you can configure them to run at off-peak times for your deployment, or disable time-based major compactions by setting this parameter to 0, and run major compactions in a cron job or by another external mechanism.
{quote}

Instead of this existing mechanism, that adds randomness into a production system (ugh), let's simply allow users to specify a cron string and replace this simple periodic (+jitter) scheduling mechanism.



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