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https://issues.apache.org/jira/browse/HDFS-6441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14037353#comment-14037353
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Daryn Sharp commented on HDFS-6441:
-----------------------------------
Is the intention of this patch to allow the balancer to run on a mixed hbase/MR
cluster? If so, then HDFS-6133 is probably the more generalized approach to
prevent the balancer from moving region file blocks.
> Add ability to exclude/include few datanodes while balancing
> ------------------------------------------------------------
>
> Key: HDFS-6441
> URL: https://issues.apache.org/jira/browse/HDFS-6441
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: balancer
> Affects Versions: 2.4.0
> Reporter: Benoy Antony
> Assignee: Benoy Antony
> Attachments: HDFS-6441.patch, HDFS-6441.patch, HDFS-6441.patch,
> HDFS-6441.patch, HDFS-6441.patch, HDFS-6441.patch, HDFS-6441.patch,
> HDFS-6441.patch, HDFS-6441.patch, HDFS-6441.patch
>
>
> In some use cases, it is desirable to ignore a few data nodes while
> balancing. The administrator should be able to specify a list of data nodes
> in a file similar to the hosts file and the balancer should ignore these data
> nodes while balancing so that no blocks are added/removed on these nodes.
> Similarly it will be beneficial to specify that only a particular list of
> datanodes should be considered for balancing.
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