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https://issues.apache.org/jira/browse/HBASE-3803?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack resolved HBASE-3803.
--------------------------
Resolution: Later
Resolving old umbrella issue whose subtasks have been done.
> Make the load balancer run with a gentle hand
> ---------------------------------------------
>
> Key: HBASE-3803
> URL: https://issues.apache.org/jira/browse/HBASE-3803
> Project: HBase
> Issue Type: Improvement
> Reporter: stack
>
> We need 'smoothing' of balancer region move.... Yesterday we brought a
> regionserver back online into a smallish cluster that was under load and the
> balance run unloaded a bunch of regions all in the one go which put a dent in
> the throughput when a bunch of regions went offline at the one time. It'd be
> sweet if the balancer ran at a context appropriate 'rate'; when under load,
> it should move regions 'gently' rather than all as a big bang (the
> decommission script will move a region at a time, verifying it deployed in
> its new location before moving another... this can take ages to complete but
> its proven minimally disruptive to loadings)
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