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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4616) Improvement to MultipleOutputs javadocs
Date Tue, 11 Sep 2012 15:55:07 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13453130#comment-13453130

Hadoop QA commented on MAPREDUCE-4616:

+1 overall.  Here are the results of testing the latest attachment 
  against trunk revision .

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

    +0 tests included.  The patch appears to be a documentation patch that doesn't require

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

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

    +1 eclipse:eclipse.  The patch built with eclipse:eclipse.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

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

    +1 core tests.  The patch passed unit tests in hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core.

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

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2842//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2842//console

This message is automatically generated.
> Improvement to MultipleOutputs javadocs
> ---------------------------------------
>                 Key: MAPREDUCE-4616
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4616
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: documentation
>    Affects Versions: 1.0.3
>            Reporter: Tony Burton
>            Priority: Minor
>              Labels: hadoop, mapreduce
>             Fix For: trunk
>         Attachments: MAPREDUCE-4616.patch
> In the new API, and using MultipleOutputs it is possible to segment output into directories
by using MultipleOutputs.write(KEYOUT key, VALUEOUT value, String baseOutputPath) in the Reducer
to determine the output directory, and by using LazyOutputFormat at the job-level config to
suppress normal output [eg use LazyOutputFormat.setOutputFormatClass(job, TextOutputFormat.class);
instead of job.setOutputFormatClass(TextOutputFormat.class);]
> This recreates the functionality previously provided in the old API by using MultipleTextOutputFormat

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