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https://issues.apache.org/jira/browse/HDFS-6955?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14741365#comment-14741365
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Kanaka Kumar Avvaru commented on HDFS-6955:
-------------------------------------------

Thanks for the review [~arpitagarwal]

1. Ok. fine
2. New tests are added for full success and volume errors. Please refer 
{{TestSpaceReservation#testTmpSpaceReserve()}}
3. it is to be used in tests for verification for recent reserved space for 
last call to assert the actual block length instead of default block size.
4. Yes, based on the code flow, block finalization is happening for 
re-replicated block also


> DN should reserve disk space for a full block when creating tmp files
> ---------------------------------------------------------------------
>
>                 Key: HDFS-6955
>                 URL: https://issues.apache.org/jira/browse/HDFS-6955
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>    Affects Versions: 2.5.0
>            Reporter: Arpit Agarwal
>            Assignee: Kanaka Kumar Avvaru
>         Attachments: HDFS-6955-01.patch, HDFS-6955-02.patch, 
> HDFS-6955-03.patch, HDFS-6955-04.patch, HDFS-6955-05.patch, 
> HDFS-6955-06.patch, HDFS-6955-07.patch
>
>
> HDFS-6898 is introducing disk space reservation for RBW files to avoid 
> running out of disk space midway through block creation.
> This Jira is to introduce similar reservation for tmp files.



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