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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1823) Reduce the number of calls of HarFileSystem.getFileStatus in RaidNode
Date Thu, 24 Jun 2010 13:00:58 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1823?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12882148#action_12882148
] 

Hadoop QA commented on MAPREDUCE-1823:
--------------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12447914/MAPREDUCE-1823.txt
  against trunk revision 957437.

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

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

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

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

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

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    -1 core tests.  The patch failed core unit tests.

    -1 contrib tests.  The patch failed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h4.grid.sp2.yahoo.net/266/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h4.grid.sp2.yahoo.net/266/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h4.grid.sp2.yahoo.net/266/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h4.grid.sp2.yahoo.net/266/console

This message is automatically generated.

> Reduce the number of calls of HarFileSystem.getFileStatus in RaidNode
> ---------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1823
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1823
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>    Affects Versions: 0.22.0
>            Reporter: Scott Chen
>            Assignee: Scott Chen
>             Fix For: 0.22.0
>
>         Attachments: MAPREDUCE-1823.txt
>
>
> RaidNode makes lots of calls of HarFileSystem.getFileStatus. This method fetches information
from DataNode so it is slow. It becomes the bottleneck of the RaidNode. It will be nice if
we can make this more efficient.

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