[jira] Commented: (PIG-1218) Use distributed cache to store samples

["Arun C Murthy (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PIG-1218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12829305#action_12829305 ] 

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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