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Posted to dev@tez.apache.org by "Rajesh Balamohan (Jira)" <ji...@apache.org> on 2020/12/07 07:13:00 UTC

[jira] [Created] (TEZ-4256) Reduce key comparisons in reducer side

Rajesh Balamohan created TEZ-4256:
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             Summary: Reduce key comparisons in reducer side
                 Key: TEZ-4256
                 URL: https://issues.apache.org/jira/browse/TEZ-4256
             Project: Apache Tez
          Issue Type: Improvement
            Reporter: Rajesh Balamohan
         Attachments: Screenshot 2020-12-07 at 12.00.08 PM.png

!Screenshot 2020-12-07 at 12.00.08 PM.png|width=1025,height=366!

 

[https://github.com/apache/tez/blob/master/tez-runtime-library/src/main/java/org/apache/tez/runtime/library/common/shuffle/orderedgrouped/MergeManager.java#L1131]

 

Returning {{KeyState (NEW_KEY/SAME_KEY)}} based on {{TezRawKeyValueIterator::isSameKey}} would helo in reducing key comparisons in reducer side.

 

{color:#828eba}kvIter{color}



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