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https://issues.apache.org/jira/browse/HDFS-6122?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Junping Du updated HDFS-6122:
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Target Version/s: (was: 2.8.0)
> Rebalance cached replicas between datanodes
> -------------------------------------------
>
> Key: HDFS-6122
> URL: https://issues.apache.org/jira/browse/HDFS-6122
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: caching
> Affects Versions: 2.3.0
> Reporter: Andrew Wang
> Assignee: Andrew Wang
>
> It'd be nice if the NameNode was able to rebalance cache usage among
> datanodes. This would help avoid situations where the only three DNs with a
> replica are full and there is still cache space on the rest of the cluster.
> It'll also probably help for heterogeneous node sizes and when adding new
> nodes to the cluster or doing a rolling restart.
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