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https://issues.apache.org/jira/browse/HDFS-13478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16443503#comment-16443503
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Yiqun Lin commented on HDFS-13478:
----------------------------------

[~elgoiri], I did a quick glance for the patch, some thoughts from me:
 * If we make decommission info as a separate table, that mean we will do the 
query operation for State Store from one time to twice. Does this will make any 
performance impact?

 * Looks like this patch is large. We could separate this into two parts:

 # Decommission Store APIs implementation (Seems HDFS-13478.000.patch is just 
doing on this).
 # Add checking logic in Router sever side and corresponding test for the 
decommission case.

> RBF: Decommission subclusters from the federation
> -------------------------------------------------
>
>                 Key: HDFS-13478
>                 URL: https://issues.apache.org/jira/browse/HDFS-13478
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Íñigo Goiri
>            Assignee: Íñigo Goiri
>            Priority: Major
>         Attachments: HDFS-13478.000.patch
>
>
> We have a subcluster in our federation that is for testing and is 
> missbehaving. This has a negative impact on the performance with operations 
> that go to every subcluster (e.g., renewLease() or setSafeMode()).



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