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Posted to hdfs-dev@hadoop.apache.org by "Ewan Higgs (JIRA)" <ji...@apache.org> on 2017/10/16 14:25:00 UTC

[jira] [Created] (HDFS-12666) Provided Storage Mount Manager (PSMM) mount

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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