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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-730) Local file system uses copy to implement rename
Date Thu, 14 Feb 2008 02:35:07 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12568784#action_12568784
] 

Hadoop QA commented on HADOOP-730:
----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
http://issues.apache.org/jira/secure/attachment/12375537/730-2.patch
against trunk revision 619744.

    @author +1.  The patch does not contain any @author tags.

    tests included -1.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no tests are needed for this patch.

    javadoc +1.  The javadoc tool did not generate any warning messages.

    javac +1.  The applied patch does not generate any new javac compiler warnings.

    release audit +1.  The applied patch does not generate any new release audit warnings.

    findbugs +1.  The patch does not introduce any new Findbugs warnings.

    core tests +1.  The patch passed core unit tests.

    contrib tests +1.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1794/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1794/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1794/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1794/console

This message is automatically generated.

> Local file system uses copy to implement rename
> -----------------------------------------------
>
>                 Key: HADOOP-730
>                 URL: https://issues.apache.org/jira/browse/HADOOP-730
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: fs
>    Affects Versions: 0.8.0
>            Reporter: Owen O'Malley
>            Assignee: Chris Douglas
>             Fix For: 0.17.0
>
>         Attachments: 730-0.patch, 730-1.patch, 730-2.patch
>
>
> There is a variable LocalFileSystem.useCopyForRename that is set to true. When true,
the local file system will implement rename as a copy followed by a delete. This is likely
a performance problem. Is there a reason that useCopyForRename is set?

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