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https://issues.apache.org/jira/browse/HADOOP-3446?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12628835#action_12628835
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Hadoop QA commented on HADOOP-3446:
-----------------------------------
+1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12389602/3446-6.patch
against trunk revision 692597.
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 6 new or modified tests.
+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 core tests. The patch passed core unit tests.
+1 contrib tests. The patch passed contrib unit tests.
Test results:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3193/testReport/
Findbugs warnings:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3193/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3193/artifact/trunk/build/test/checkstyle-errors.html
Console output:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3193/console
This message is automatically generated.
> The reduce task should not flush the in memory file system before starting
> the reducer
> --------------------------------------------------------------------------------------
>
> Key: HADOOP-3446
> URL: https://issues.apache.org/jira/browse/HADOOP-3446
> Project: Hadoop Core
> Issue Type: Improvement
> Components: mapred
> Reporter: Owen O'Malley
> Assignee: Chris Douglas
> Priority: Critical
> Fix For: 0.19.0
>
> Attachments: 3446-0.patch, 3446-1.patch, 3446-2.patch, 3446-3.patch,
> 3446-4.patch, 3446-5.patch, 3446-6.patch
>
>
> In the case where the entire reduce inputs fit in ram, we currently force the
> input to disk and re-read it before giving it to the reducer. It would be
> much better if we merged from the ramfs and any spills to feed the reducer
> its input.
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