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https://issues.apache.org/jira/browse/HDFS-11310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16353286#comment-16353286
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Wangda Tan commented on HDFS-11310:
-----------------------------------
Thanks [~daryn] for reporting this issue. We plan to start merge vote of 3.1.0
on Feb 18, please let me know if any plan to finish this by Feb 18 or we need
to move it out.
> 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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