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From "Thejas M Nair (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-1617) 'group all' should always use one reducer
Date Fri, 17 Sep 2010 00:34:33 GMT
'group all' should always use one reducer
-----------------------------------------

                 Key: PIG-1617
                 URL: https://issues.apache.org/jira/browse/PIG-1617
             Project: Pig
          Issue Type: Improvement
    Affects Versions: 0.8.0
            Reporter: Thejas M Nair
            Assignee: Thejas M Nair
             Fix For: 0.8.0


'group all' sends all rows to a single reducer, it does not make sense to spawn more than
one reducer for it. But if higher value of parallelism is specified or if the input is large
enough so that changes in PIG-1249 result in larger value being set, there are additional
reducers spawned that don't do anything useful.


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