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https://issues.apache.org/jira/browse/HDFS-11256?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Brahma Reddy Battula updated HDFS-11256:
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Target Version/s: (was: 3.0.0-alpha1)
> Rebalance specific directory
> ----------------------------
>
> Key: HDFS-11256
> URL: https://issues.apache.org/jira/browse/HDFS-11256
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: balancer & mover
> Affects Versions: 3.0.0-alpha1
> Reporter: Amos Bird
>
> Currently hdfs only supports rebalancing over entire cluster. This might not
> be utilized by data processing systems like hive, spark, impala etl.
> In hive, we may need to maximize some fact tables IO performance by carefully
> sharding their blocks evenly over all disks. Normally a INSERT SELECT is done
> to achieve such redistributing progress.
> Given a table is backed by one directory on hdfs, rebalancing specific dir
> may be very useful.
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