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Posted to hdfs-dev@hadoop.apache.org by "dragon (JIRA)" <ji...@apache.org> on 2016/03/15 09:14:34 UTC

[jira] [Created] (HDFS-9975) CLONE - Erasure Coding: update the Balancer/Mover data migration logic

dragon created HDFS-9975:
----------------------------

             Summary: CLONE - Erasure Coding: update the Balancer/Mover data migration logic
                 Key: HDFS-9975
                 URL: https://issues.apache.org/jira/browse/HDFS-9975
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: dragon
            Assignee: Walter Su
             Fix For: HDFS-7285


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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