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https://issues.apache.org/jira/browse/PIG-1218?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Dai closed PIG-1218.
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> Use distributed cache to store samples
> --------------------------------------
>
>                 Key: PIG-1218
>                 URL: https://issues.apache.org/jira/browse/PIG-1218
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Olga Natkovich
>            Assignee: Richard Ding
>             Fix For: 0.7.0
>
>         Attachments: PIG-1218.patch, PIG-1218_2.patch, PIG-1218_3.patch
>
>
> Currently, in the case of skew join and order by we use sample that is just 
> written to the dfs (not distributed cache) and, as the result, get opened and 
> copied around more than necessary. This impacts query performance and also 
> places unnecesary load on the name node

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