[jira] [Created] (HDFS-8921) Add an option to Balancer so tha it only uses the k-most over-utilized DNs or all over-utilized DNs as sources.

[Tsz Wo Nicholas Sze (JIRA)]

Tsz Wo Nicholas Sze created HDFS-8921:
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             Summary: Add an option to Balancer so tha it only uses the k-most 
over-utilized DNs or all over-utilized DNs as sources.
                 Key: HDFS-8921
                 URL: https://issues.apache.org/jira/browse/HDFS-8921
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: balancer & mover
            Reporter: Tsz Wo Nicholas Sze
            Assignee: Tsz Wo Nicholas Sze


Arpit suggested to add a separate option to source from the most over-utilized 
DataNodes first so the administrator does not have to pass the source DNs 
manually; see [this 
comment|https://issues.apache.org/jira/browse/HDFS-8826?focusedCommentId=14700576&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14700576].
  The new option could allow specifying the k-most over-utilized DNs or all 
over-utilized DNs as sources.




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