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https://issues.apache.org/jira/browse/HBASE-12007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14140753#comment-14140753
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Jimmy Xiang commented on HBASE-12007:
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bq. We have two mechanisms for distributing regions on a cluster?
Regions on master are handled with balanceMasterRegions which is internal to
the balancer.
bq. In branch-1, master can carry regions? DIdn't we disable that for branch-1?
Yes, it still can, if configured. It doesn't host any region by default.
bq. Or is it not possible to undo M being a RS?
Very hard, and it is useful for most of use cases.
bq. We could assign to backup master?
Yes, that's right.
> StochasticBalancer should avoid putting user regions on master
> --------------------------------------------------------------
>
> Key: HBASE-12007
> URL: https://issues.apache.org/jira/browse/HBASE-12007
> Project: HBase
> Issue Type: Bug
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Attachments: hbase-12007.patch
>
>
> We should enhance how StochasticBalancer picks up a random server so that it
> can avoid putting user regions on master, because regions on master are
> handled differently in a separate method.
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