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Jing Zhao commented on HDFS-7621: --------------------------------- Sure. Assign the jira to you. Thanks for working on this, Walter! > 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 > > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)