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https://issues.apache.org/jira/browse/PIG-1218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12829305#action_12829305
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Arun C Murthy commented on PIG-1218:
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I'd also suggest we increase replication factor for the sample-file in HDFS
before adding it to the distributed-cache.
> 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
>
>
> 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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