[jira] [Created] (HADOOP-14983) DistCp diff option support for snapshot root descendant directories

["Manoj Govindassamy (JIRA)" <ji...@apache.org>]

Manoj Govindassamy created HADOOP-14983:
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             Summary: DistCp diff option support for snapshot root descendant directories
                 Key: HADOOP-14983
                 URL: https://issues.apache.org/jira/browse/HADOOP-14983
             Project: Hadoop Common
          Issue Type: Improvement
    Affects Versions: 3.0.0
            Reporter: Manoj Govindassamy
            Assignee: Manoj Govindassamy


HDFS-12544 enables SnapshotDiff generation on any snapshot root descendant directory. Previous to this, all snapshot diff operations had to be based on snapshot root directory. DistCp already supports update diff option by which snapshot diff report between any given two snapshots can be used to identify the difference between source and target, and apply the diff to the target to make it in sync with source. But, the snapshot source and target paths need to be a snapshot root directory for the diff option to work.

{noformat}
DistCp -update -diff <oldSnapshot> <newSnapshot> <source-snapshot-root-dir> <target-snapshot-root-dir>
{noformat}

Better if DistCp can also support update diff option on any descendant directories under snapshot root, provided HDFS-12544 is enabled.



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