Andrew Wang created HDFS-11941:
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Summary: Move dfsadmin triggerBlockReport and metaSave to
debugadmin
Key: HDFS-11941
URL: https://issues.apache.org/jira/browse/HDFS-11941
Project: Hadoop HDFS
Issue Type: Improvement
Affects Versions: 2.9.0, 3.0.0-alpha4
Reporter: Andrew Wang
Filing a JIRA for discussion. While reviewing the [dfsadmin
commands|https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/HDFSCommands.html#dfsadmin]
some of them seem better suited for debugadmin:
* triggerBlockReport: similar to recoverLease in debugadmin, you don't need
this unless HDFS is in a bad state
* metasave: dumps NN datastructures to a side file. Seems purely for debugging.
DebugAdmin commands notably do not need to be compatible between releases and
do not have Java API equivalents in HdfsAdmin.
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