Add a parameter to `hdfs dfsadmin -saveNamespace' to allow an arbitrary storage
dir
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Key: HDFS-2746
URL: https://issues.apache.org/jira/browse/HDFS-2746
Project: Hadoop HDFS
Issue Type: New Feature
Components: name-node
Affects Versions: 0.24.0
Reporter: Aaron T. Myers
Presently `hdfs dfsadmin -saveNamespace' will attempt to save a snapshot of the
file system metadata state into all configured storage dirs. It would be nice
if we could optionally specify an arbitrary local dir to save the FS state
into, instead of the configured storage dirs.
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