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https://issues.apache.org/jira/browse/HBASE-23297?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16975941#comment-16975941
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chenxu commented on HBASE-23297:
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ya, it's an improvement, the orginal balanceRSGroup will have a final balance, 
but will take too long time

> [RSGROUP] build RegionPlan per group not per table
> --------------------------------------------------
>
>                 Key: HBASE-23297
>                 URL: https://issues.apache.org/jira/browse/HBASE-23297
>             Project: HBase
>          Issue Type: Improvement
>          Components: Balancer, rsgroup
>            Reporter: chenxu
>            Assignee: chenxu
>            Priority: Major
>
> RSGroupAdminServer#balanceRSGroup will take too long time, if the target 
> group has thousands of tables, because we will build RegionPlan for each 
> table, I think it’s better to balance per group instead of per table.



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