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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-6861) Separate Balancer specific logic form Dispatcher
Date Mon, 18 Aug 2014 14:57:18 GMT
Tsz Wo Nicholas Sze created HDFS-6861:
-----------------------------------------

             Summary: Separate Balancer specific logic form Dispatcher
                 Key: HDFS-6861
                 URL: https://issues.apache.org/jira/browse/HDFS-6861
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: balancer
            Reporter: Tsz Wo Nicholas Sze
            Assignee: Tsz Wo Nicholas Sze


In order to balance datanode storage utilization of a cluster, Balancer (1) classifies datanodes
into different groups (overUtilized, aboveAvgUtilized, belowAvgUtilized and underUtilized),
(2) chooses source and target datanode pairs and (3) chooses blocks to move.  Some of these
logic are in Dispatcher.  It is better to separate them out.  This JIRA is a further work
of HDFS-6828.



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