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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-7621) Erasure Coding: update the Balancer/Mover data migration logic
Date Wed, 03 Jun 2015 18:53:38 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7621?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zhe Zhang resolved HDFS-7621.
-----------------------------
       Resolution: Fixed
    Fix Version/s: HDFS-7285
     Hadoop Flags: Reviewed

+1 on the latest patch. Thanks Walter for completing this major piece of work!

I just committed the patch to the branch.

> Erasure Coding: update the Balancer/Mover data migration logic
> --------------------------------------------------------------
>
>                 Key: HDFS-7621
>                 URL: https://issues.apache.org/jira/browse/HDFS-7621
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Jing Zhao
>            Assignee: Walter Su
>              Labels: HDFS-7285
>             Fix For: HDFS-7285
>
>         Attachments: HDFS-7621.001.patch, HDFS-7621.002.patch, HDFS-7621.003.patch, HDFS-7621.004.patch,
HDFS-7621.005.patch, HDFS-7621.006.patch, HDFS-7621.007.patch
>
>
> Currently the Balancer/Mover only considers the distribution of replicas of the same
block during data migration: the migration cannot decrease the number of racks. With EC the
Balancer and Mover should also take into account the distribution of blocks belonging to the
same block group.



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