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From "Gopal V (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-7302) Allow Auto-reducer parallelism to be turned off by a logical optimizer
Date Fri, 27 Jun 2014 02:22:24 GMT
Gopal V created HIVE-7302:
-----------------------------

             Summary: Allow Auto-reducer parallelism to be turned off by a logical optimizer
                 Key: HIVE-7302
                 URL: https://issues.apache.org/jira/browse/HIVE-7302
             Project: Hive
          Issue Type: Bug
          Components: Tez
    Affects Versions: 0.14.0
            Reporter: Gopal V
            Assignee: Gopal V


Auto reducer parallelism cannot be used for cases where a custom routing VertexManager is
used.

Allow a tri-state for ReduceSinkDesc::isAutoParallel to allow "allow, disable, unset" mechanics.

The state machine for this setting will now be 

Allowed transitions

unset -> allow
unset -> disable
allow -> disable

with no transition case for

disable -> allow.



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