Ewan Higgs created HDFS-12666:
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Summary: Provided Storage Mount Manager (PSMM) mount
Key: HDFS-12666
URL: https://issues.apache.org/jira/browse/HDFS-12666
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Ewan Higgs
Implement the Provided Storage Mount Manager. This is a service (thread) in the
Namenode that manages backup mounts, unmounts, snapshotting, and monitoring the
progress of backups.
On mount, the mount manager writes XATTR information at the top level of the
mount to do the appropriate bookkeeping. This is done to maintain state in case
the Namenode falls over.
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