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https://issues.apache.org/jira/browse/HDFS-11310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16617246#comment-16617246
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Sunil Govindan commented on HDFS-11310:
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As code freeze for 3.2 is crossed, moving this Jira to 3.3. Thank you.
> Reduce the performance impact of the balancer (trunk port)
> ----------------------------------------------------------
>
> Key: HDFS-11310
> URL: https://issues.apache.org/jira/browse/HDFS-11310
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs, namenode
> Affects Versions: 3.0.0-alpha1
> Reporter: Daryn Sharp
> Priority: Critical
>
> HDFS-7967 introduced a highly performant balancer getBlocks() query that
> scales to large/dense clusters. The simple design implementation depends on
> the triplets data structure. HDFS-9260 removed the triplets which
> fundamentally changes the implementation. Either that patch must be reverted
> or the getBlocks() patch needs reimplementation.
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