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Posted to dev@pig.apache.org by "Hadoop QA (JIRA)" <ji...@apache.org> on 2009/12/04 08:33:20 UTC
[jira] Commented: (PIG-480) PERFORMANCE: Use identity mapper in a
chain of M-R jobs
[ https://issues.apache.org/jira/browse/PIG-480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12785801#action_12785801 ]
Hadoop QA commented on PIG-480:
-------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12426804/PIG_480.patch
against trunk revision 887049.
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 3 new or modified tests.
+1 javadoc. The javadoc tool did not generate any warning messages.
-1 javac. The applied patch generated 217 javac compiler warnings (more than the trunk's current 213 warnings).
-1 findbugs. The patch appears to cause Findbugs to fail.
+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 passed contrib unit tests.
Test results: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h8.grid.sp2.yahoo.net/88/testReport/
Console output: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h8.grid.sp2.yahoo.net/88/console
This message is automatically generated.
> PERFORMANCE: Use identity mapper in a chain of M-R jobs
> -------------------------------------------------------
>
> Key: PIG-480
> URL: https://issues.apache.org/jira/browse/PIG-480
> Project: Pig
> Issue Type: Improvement
> Affects Versions: 0.2.0
> Reporter: Olga Natkovich
> Assignee: Ying He
> Attachments: PIG_480.patch
>
>
> For jobs with two or more MR jobs, use identity mapper wherever possible in second and subsequent MR jobs. Identity mapper is about 50% than pig empty map job because it doesn't parse the data.
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