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From "Greg Hogan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-3279) Optionally disable DistinctOperator combiner
Date Fri, 22 Jan 2016 17:51:40 GMT
Greg Hogan created FLINK-3279:
---------------------------------

             Summary: Optionally disable DistinctOperator combiner
                 Key: FLINK-3279
                 URL: https://issues.apache.org/jira/browse/FLINK-3279
             Project: Flink
          Issue Type: New Feature
          Components: DataSet API
    Affects Versions: 1.0.0
            Reporter: Greg Hogan
            Priority: Minor


Calling {{DataSet.distinct()}} executes {{DistinctOperator.DistinctFunction}} which is a combinable
{{RichGroupReduceFunction}}. Sometimes we know that there will be few duplicate records and
disabling the combine would improve performance.

I propose adding {{public DistinctOperator<T> setCombinable(boolean combinable)}} to
{{DistinctOperator}}.



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