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From "Virajith Jalaparti (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-13777) [PROVIDED Phase 2] Scheduler in the NN for distributing DNA_BACKUP work.
Date Fri, 10 Aug 2018 00:46:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-13777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16575619#comment-16575619
] 

Virajith Jalaparti commented on HDFS-13777:
-------------------------------------------

Hi Ewan, can we please split this up into sub-tasks of HDFS-12090? From a scan of the patch,
I can see the following logically separable tasks -- changes to the client protocol (this
seems to be in HDFS-12478), the mount manager (this seems to be HDFS-12666), changes to the
snapshot diff etc. I think the patch for this one should include only the functionality indicated
by the title of this JIRA; everything else should go into its own task.

> [PROVIDED Phase 2] Scheduler in the NN for distributing DNA_BACKUP work.
> ------------------------------------------------------------------------
>
>                 Key: HDFS-13777
>                 URL: https://issues.apache.org/jira/browse/HDFS-13777
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Ewan Higgs
>            Assignee: Ewan Higgs
>            Priority: Major
>         Attachments: HDFS-13777-HDFS-12090.001.patch, HDFS-13777-HDFS-12090.002.patch,
HDFS-13777-HDFS-12090.003.patch
>
>
> When the SyncService is running, it should periodically take snapshots, make a snapshotdiff,
and then distribute DNA_BACKUP work to the Datanodes (See HDFS-13421). Upon completion of
the work, the NN should update the AliasMap.



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