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Posted to dev@hive.apache.org by "Namit Jain (JIRA)" <ji...@apache.org> on 2012/09/07 06:34:08 UTC

[jira] [Updated] (HIVE-3086) Skewed Join Optimization

     [ https://issues.apache.org/jira/browse/HIVE-3086?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Namit Jain updated HIVE-3086:
-----------------------------

    Status: Open  (was: Patch Available)

comments from Kevin
                
> Skewed Join Optimization
> ------------------------
>
>                 Key: HIVE-3086
>                 URL: https://issues.apache.org/jira/browse/HIVE-3086
>             Project: Hive
>          Issue Type: New Feature
>            Reporter: Nadeem Moidu
>            Assignee: Namit Jain
>         Attachments: hive.3086.1.patch
>
>
> During a join operation, if one of the columns has a skewed key, it can cause that particular reducer to become the bottleneck. The following feature will address it:
> https://cwiki.apache.org/confluence/display/Hive/Skewed+Join+Optimization

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