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https://issues.apache.org/jira/browse/HADOOP-3487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12606871#action_12606871
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Tsz Wo (Nicholas), SZE commented on HADOOP-3487:
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+1 patch looks good
> Balancer should not allocate a thread per block move
> ----------------------------------------------------
>
> Key: HADOOP-3487
> URL: https://issues.apache.org/jira/browse/HADOOP-3487
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.17.0
> Reporter: Hairong Kuang
> Assignee: Hairong Kuang
> Priority: Blocker
> Fix For: 0.18.0
>
> Attachments: balancerThread.patch, balancerThread1.patch
>
>
> It will be more efficient to use a thread pool to provision thread for each
> block move.
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