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https://issues.apache.org/jira/browse/PIG-465?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pradeep Kamath updated PIG-465:
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Attachment: PIG-465.patch
> PERFORMANCE: removing keys from the value
> -----------------------------------------
>
> Key: PIG-465
> URL: https://issues.apache.org/jira/browse/PIG-465
> Project: Pig
> Issue Type: Improvement
> Affects Versions: types_branch
> Reporter: Olga Natkovich
> Assignee: Pradeep Kamath
> Fix For: types_branch
>
> Attachments: PIG-465.patch
>
>
> Currently, reducers get the key data twice: once in the key and once in the
> value. If grouping key is the large part of the value, this causes large data
> replication and performance loss.
> The key should not be sent as part of the value. Instead, a metadata should
> used to assist in reconstructing the row from the key and the remaining data
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