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From "zhaoyunjiong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6133) Make Balancer support exclude specified path
Date Wed, 07 May 2014 02:41:22 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13991492#comment-13991492
] 

zhaoyunjiong commented on HDFS-6133:
------------------------------------

I'll use boolean instead of Boolean.

Yes, the NN  may not grant all the requested/favored nodes. The best way is to only pin the
blocks on the favored nodes, but considered the probability that NN didn't grant all the favored
nodes is small, so I just pinned them all.

Also I was wondering whether I should provide a API that let user pinning/un-pinning blocks
after file created. That might be more useful than combine pinning with favored nodes.



> Make Balancer support exclude specified path
> --------------------------------------------
>
>                 Key: HDFS-6133
>                 URL: https://issues.apache.org/jira/browse/HDFS-6133
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: balancer, namenode
>            Reporter: zhaoyunjiong
>            Assignee: zhaoyunjiong
>         Attachments: HDFS-6133-1.patch, HDFS-6133.patch
>
>
> Currently, run Balancer will destroying Regionserver's data locality.
> If getBlocks could exclude blocks belongs to files which have specific path prefix, like
"/hbase", then we can run Balancer without destroying Regionserver's data locality.



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