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https://issues.apache.org/jira/browse/HBASE-6744?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13450952#comment-13450952
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Elliott Clark commented on HBASE-6744:
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The StochasticLoadBalancer that was added a little while ago should give you
the best of both worlds. It tries to spread all tables as much as posible
without making things too unbalanced. Does that work for you? or were you
thinking of something different ?
> Per table balancing could cause regions unbalanced overall
> ----------------------------------------------------------
>
> Key: HBASE-6744
> URL: https://issues.apache.org/jira/browse/HBASE-6744
> Project: HBase
> Issue Type: Improvement
> Reporter: Jimmy Xiang
>
> Per table balancing just balances regions based on tables. However, overall,
> regions could be seriously unbalanced.
> For example, if you shutdown all most all region serves in a cluster, then
> create tons of new tables (no region pre-split), then start up all region
> servers. You will see the regions won't move to other region servers since
> they are balanced per table (only one region for a table at this moment).
> If we can make the balance algorithm sophisticated enough, we don't need the
> configuration hbase.master.loadbalance.bytable. We can do the regular and
> bytable balancing at the same time.
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