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https://issues.apache.org/jira/browse/HDFS-16545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17523572#comment-17523572
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Mingliang Liu commented on HDFS-16545:
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Rack-wide balancer could cause some useless data movement if next balancer run
is cluster-wide. How to address that problem? Also do we plan to allow multiple
rack-wide balancers (different racks)?
> Provide option to balance rack level in Balancer
> ------------------------------------------------
>
> Key: HDFS-16545
> URL: https://issues.apache.org/jira/browse/HDFS-16545
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Renukaprasad C
> Assignee: Renukaprasad C
> Priority: Minor
>
> Currently Balancer tool run on entire cluster and balance across the racks.
> In we need to balance within a rack, then need to provide an option to
> support the rack level balancing.
> [~surendralilhore] [~hemanthboyina]
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