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https://issues.apache.org/jira/browse/HDFS-9375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14998228#comment-14998228
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Lin Yiqun commented on HDFS-9375:
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And I test the new {{-setBalancerBandwidth}} command by a dfsadmin way,the
result is true.
> Set balancer bandwidth for specific node
> ----------------------------------------
>
> Key: HDFS-9375
> URL: https://issues.apache.org/jira/browse/HDFS-9375
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: balancer & mover
> Affects Versions: 2.7.1
> Reporter: Lin Yiqun
> Assignee: Lin Yiqun
> Attachments: HDFS-9375.001.patch, HDFS-9375.002.patch,
> HDFS-9375.003.patch
>
>
> Now even though the balancer is impove a lot, but In some cases that is still
> slow. For example when the cluster is extended,the new nodes all need
> balancer datas from existed nodes.In order to improve the balancer
> velocity,generally,we will use {{setBalancerBandwidth}} of {{dfsadmin}}
> command.But this is set for every node, obviously,we can increase more
> bandwidth for new nodes because these nodes lacking of data.When the new
> nodes balancer data enough,we can let new nodes to work.So we can define a
> new clientDatanode interface to set specific node's bandwidth.
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