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From "liuxian (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-23389) When the shuffle dependency specifies aggregation ,and `dependency.mapSideCombine=false`, we should be able to use serialized sorting.
Date Mon, 12 Feb 2018 01:28:00 GMT
liuxian created SPARK-23389:
-------------------------------

             Summary: When the shuffle dependency specifies aggregation ,and `dependency.mapSideCombine=false`,
 we should be able to use serialized sorting.
                 Key: SPARK-23389
                 URL: https://issues.apache.org/jira/browse/SPARK-23389
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
    Affects Versions: 2.3.0
            Reporter: liuxian


When the shuffle dependency specifies aggregation ,and `dependency.mapSideCombine=false`,
in the map side,there is no need for aggregation and sorting, so we should be able to use
serialized sorting.



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