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https://issues.apache.org/jira/browse/HBASE-3945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13044017#comment-13044017
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Jonathan Gray commented on HBASE-3945:
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I worry about this approach of more and more knobs, especially when they don't
directly address what a good/bad load balance really is.
If a region gets moved in two consecutive balancing actions, then something is
wrong with the balancer in the first place. While I agree in principle that
regions moving multiple times and quickly is not desirable, this will be a
common outcome if the balancing algorithm isn't already taking into account
metrics over time (rather than short snapshots). If we're using load but then
adding all these limits/controls, it's hard to ever understand the behavior of
the balancer.
> Load balancer shouldn't move the same region in two consective balancing
> actions
> --------------------------------------------------------------------------------
>
> Key: HBASE-3945
> URL: https://issues.apache.org/jira/browse/HBASE-3945
> Project: HBase
> Issue Type: Improvement
> Reporter: Ted Yu
>
> Keeping a region on the same region server would give good stability for
> active scanners.
> We shouldn't reassign the same region in two successive calls to
> balanceCluster().
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