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https://issues.apache.org/jira/browse/HBASE-3799?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13021777#comment-13021777
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Ted Yu commented on HBASE-3799:
-------------------------------
We can limit the number (percentage) of regions that are moved off a single
region server.
Should that be part of this JIRA ?
> Provide more accurate check for super underloaded region server in load
> balancer
> --------------------------------------------------------------------------------
>
> Key: HBASE-3799
> URL: https://issues.apache.org/jira/browse/HBASE-3799
> Project: HBase
> Issue Type: Bug
> Components: mapreduce
> Affects Versions: 0.90.2
> Reporter: Ted Yu
> Assignee: Ted Yu
> Attachments: 3799.patch
>
>
> HBASE-3609 used simple check for region server which recently joined the
> cluster so that both young and old regions from other region servers are
> assigned to it.
> The check was too strict.
> 1 or more region may be assigned to this server before load balancer performs
> rebalancing.
> The next time balancer runs, it wouldn't treat this server as seriously
> underloaded correctly and assign a lot of young regions to it.
> We can use threshold over the number of regions to avoid such issue.
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