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https://issues.apache.org/jira/browse/PIG-1309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12847589#action_12847589
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Alan Gates commented on PIG-1309:
---------------------------------
Here's a write up on the design behind this:
http://wiki.apache.org/pig/MapSideCogroup
> Map-side Cogroup
> ----------------
>
> Key: PIG-1309
> URL: https://issues.apache.org/jira/browse/PIG-1309
> Project: Pig
> Issue Type: Bug
> Components: impl
> Reporter: Ashutosh Chauhan
> Assignee: Ashutosh Chauhan
> Attachments: mapsideCogrp.patch
>
>
> In never ending quest to make Pig go faster, we want to parallelize as many
> relational operations as possible. Its already possible to do Group-by(
> PIG-984 ) and Joins( PIG-845 , PIG-554 ) purely in map-side in Pig. This jira
> is to add map-side implementation of Cogroup in Pig. Details to follow.
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