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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7340) Allow user-specified actions following region movement
Date Thu, 13 Dec 2012 14:52:14 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13531052#comment-13531052
] 

Ted Yu commented on HBASE-7340:
-------------------------------

For HMaster.balance(), we first unassign the regions. For postBalance() call, the regions
may not have time to reach destination. I think in this case postBalance() just provides some
hint as for the final destination.
                
> Allow user-specified actions following region movement
> ------------------------------------------------------
>
>                 Key: HBASE-7340
>                 URL: https://issues.apache.org/jira/browse/HBASE-7340
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ted Yu
>
> Sometimes user performs compaction after a region is moved (by balancer). We should provide
'hook' which lets user specify what follow-on actions to take after region movement.
> See discussion on user mailing list under the thread 'How to know it's time for a major
compaction?' for background information: http://search-hadoop.com/m/BDx4S1jMjF92&subj=How+to+know+it+s+time+for+a+major+compaction+

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