Wangda Tan updated HDFS-11310:
    Target Version/s: 3.2.0  (was: 3.1.0)

> 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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