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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9038) Reserved space is erroneously counted towards non-DFS used.
Date Wed, 11 Nov 2015 06:48:11 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15000017#comment-15000017
] 

Chris Nauroth commented on HDFS-9038:
-------------------------------------

[~brahmareddy], thank you for working on this.  My earliest opportunity to code review this
will be next Tuesday, 11/17.  Of course, if someone else in the community would like to take
up the review, that's great too.

> Reserved space is erroneously counted towards non-DFS used.
> -----------------------------------------------------------
>
>                 Key: HDFS-9038
>                 URL: https://issues.apache.org/jira/browse/HDFS-9038
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>    Affects Versions: 2.7.1
>            Reporter: Chris Nauroth
>            Assignee: Brahma Reddy Battula
>         Attachments: HDFS-9038-002.patch, HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider the reserved
space held by the {{dfs.datanode.du.reserved}} configuration property.  As a side effect,
reserved space is now counted towards non-DFS used.  I don't believe it was intentional to
change the definition of non-DFS used.  This issue proposes restoring the prior behavior:
do not count reserved space towards non-DFS used.



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