Andrew Wang created HDFS-6093:
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Summary: Expose more caching information for debugging by users
Key: HDFS-6093
URL: https://issues.apache.org/jira/browse/HDFS-6093
Project: Hadoop HDFS
Issue Type: Improvement
Components: caching
Affects Versions: 2.4.0
Reporter: Andrew Wang
Assignee: Andrew Wang
When users submit a new cache directive, it's unclear if the NN has recognized
it and is actively trying to cache it, or if it's hung for some other reason.
It'd be nice to expose a "pending caching/uncaching" count the same way we
expose pending replication work.
It'd also be nice to display the aggregate cache capacity and usage in dfsadmin
-report, since we already have have it as a metric and expose it per-DN in
report output.
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