Andrew Wang created HDFS-6122:
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Summary: 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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