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https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15177060#comment-15177060
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Arpit Agarwal edited comment on HDFS-9038 at 3/3/16 2:57 AM:
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Hi [~brahmareddy], I am sorry this patch is stuck after all the effort you put
into it.
There is a disagreement on the definition of non-DFS used space. Quoting
[~cnauroth]:
bq. Essentially, it's a question of whether this metric means "Raw Non-DFS
Used" or "Unplanned Non-DFS Used".
I don't see any harm in starting a discussion on hdfs-dev. I will think about
this some more.
was (Author: arpitagarwal):
Hi [~brahmareddy], I am sorry this patch is stuck after all the effort you put
into it.
There is a disagreement on what the definition of non-DFS used space. Quoting
[~cnauroth]:
bq. Essentially, it's a question of whether this metric means "Raw Non-DFS
Used" or "Unplanned Non-DFS Used".
I don't see any harm in starting a discussion on hdfs-dev. I will think about
this some more.
> DFS 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: GetFree.java, HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038-006.patch,
> HDFS-9038-007.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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