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https://issues.apache.org/jira/browse/PIG-792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12735810#action_12735810
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Hadoop QA commented on PIG-792:
-------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12414400/skewedjoin.patch
  against trunk revision 797290.

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

    +1 tests included.  The patch appears to include 4 new or modified tests.

    -1 javadoc.  The javadoc tool appears to have generated 1 warning messages.

    -1 javac.  The applied patch generated 257 javac compiler warnings (more 
than the trunk's current 255 warnings).

    -1 findbugs.  The patch appears to introduce 2 new Findbugs warnings.

    +1 release audit.  The applied patch does not increase the total number of 
release audit 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/Pig-Patch-minerva.apache.org/141/testReport/
Findbugs warnings: 
http://hudson.zones.apache.org/hudson/job/Pig-Patch-minerva.apache.org/141/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: 
http://hudson.zones.apache.org/hudson/job/Pig-Patch-minerva.apache.org/141/console

This message is automatically generated.

> PERFORMANCE: Support skewed join in pig
> ---------------------------------------
>
>                 Key: PIG-792
>                 URL: https://issues.apache.org/jira/browse/PIG-792
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Sriranjan Manjunath
>         Attachments: skewedjoin.patch
>
>
> Fragmented replicated join has a few limitations:
>  - One of the tables needs to be loaded into memory
>  - Join is limited to two tables
> Skewed join partitions the table and joins the records in the reduce phase. 
> It computes a histogram of the key space to account for skewing in the input 
> records. Further, it adjusts the number of reducers depending on the key 
> distribution.
> We need to implement the skewed join in pig.

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