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https://issues.apache.org/jira/browse/HBASE-3422?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13008447#comment-13008447
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Ted Yu commented on HBASE-3422:
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Currently it is possible for one HMaster.balance() call to last longer than
hbase.balancer.period
We should limit the execution time of HMaster.balance() by hbase.balancer.period
Is this equivalent to introducing hbase.balancer.maxregions.perround ?
> Balancer will willing try to rebalance thousands of regions in one go; needs
> an upper bound added.
> --------------------------------------------------------------------------------------------------
>
> Key: HBASE-3422
> URL: https://issues.apache.org/jira/browse/HBASE-3422
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.90.0
> Reporter: stack
> Assignee: Ted Yu
>
> See HBASE-3420. Therein, a wonky cluster had 5k regions on one server and <
> 1k on others. Balancer ran and wanted to redistribute 3k+ all in one go.
> Madness.
> If a load of rebalancing to be done, should be done somewhat piecemeal. We
> need maximum regions to rebalance at a time upper bound at a minimum.
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