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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