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From "Brahma Reddy Battula (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-9038) Reserved space is erroneously counted towards non-DFS used.
Date Wed, 04 Nov 2015 11:44:28 GMT

     [ https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Brahma Reddy Battula updated HDFS-9038:
---------------------------------------
    Attachment: HDFS-9038.patch

Uploading the patch to makes nonDFSUsed accurate by considering reservedForReplicas also.Actually
bug is not there as mentioned in description,Since reserved was already subtracted from total
capacity, nonDfsUsed was not including the reserved.

But getAvailable() value was calculated directly from DF, but there reserved was not considered,
which was fixed.

> 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.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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