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From "churro morales (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12890) Provide a way to throttle the number of regions moved by the balancer
Date Wed, 19 Aug 2015 15:29:47 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14703188#comment-14703188

churro morales commented on HBASE-12890:

Agreed, it does work for the stochastic load balancer. Reason why i suggested the patch was
this will work for any balancer you decide to go with.  The patch however has the downfall
where the respective balancer creates plans for everything then we filter away......but we
use the table level and not stochastic.   

> Provide a way to throttle the number of regions moved by the balancer
> ---------------------------------------------------------------------
>                 Key: HBASE-12890
>                 URL: https://issues.apache.org/jira/browse/HBASE-12890
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.98.10
>            Reporter: churro morales
>            Assignee: churro morales
>             Fix For: 2.0.0, 1.3.0, 0.98.15
>         Attachments: HBASE-12890.patch
> We have a very large cluster and we frequently add remove quite a few regionservers from
our cluster.  Whenever we do this the balancer moves thousands of regions at once.  Instead
we provide a configuration parameter: hbase.balancer.max.regions.  This limits the number
of regions that are balanced per iteration.  

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