Tsz Wo Nicholas Sze created HDFS-6861:
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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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