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Posted to dev@hive.apache.org by "Gang Tim Liu (JIRA)" <ji...@apache.org> on 2013/01/14 05:06:14 UTC

[jira] [Created] (HIVE-3890) Hive List Bucketing - merge per skewed dir

Gang Tim Liu created HIVE-3890:
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             Summary: Hive List Bucketing - merge per skewed dir
                 Key: HIVE-3890
                 URL: https://issues.apache.org/jira/browse/HIVE-3890
             Project: Hive
          Issue Type: Improvement
            Reporter: Gang Tim Liu
            Assignee: Gang Tim Liu


Right now, in list bucketing DML, if it involves merge, it uses 1 MR job for all skewed directory. If no. of files is big, it might triggers hive client side OOM due to too many spits. If we use 1 MR job for one skewed dir, it will reduce OOM risks.

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