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From "Chao Sun" <>
Subject Re: Review Request 26569: HIVE-8276 - Separate shuffle from ReduceTran and so create ShuffleTran [Spark Branch]
Date Fri, 10 Oct 2014 19:18:36 GMT

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(Updated Oct. 10, 2014, 7:18 p.m.)

Review request for hive and Xuefu Zhang.


Added cache flag for ShuffleTran.

Bugs: HIVE-8276

Repository: hive-git


Currently ShuffleTran captures both shuffle and reduce side processing. Per HIVE-8118, sometimes
the output RDD from shuffle needs to be cached for better performance. Thus, it makes sense
to separate shuffle from Reduce and create ShuffleTran class.

Diffs (updated)

  ql/src/java/org/apache/hadoop/hive/ql/exec/spark/ 6c3cf2f 
  ql/src/java/org/apache/hadoop/hive/ql/exec/spark/ 0732e06 
  ql/src/java/org/apache/hadoop/hive/ql/exec/spark/ e62527c 
  ql/src/java/org/apache/hadoop/hive/ql/exec/spark/ 52ac724 
  ql/src/java/org/apache/hadoop/hive/ql/exec/spark/ PRE-CREATION 
  ql/src/java/org/apache/hadoop/hive/ql/exec/spark/ 8e251df 
  ql/src/java/org/apache/hadoop/hive/ql/exec/spark/ e770158 




Chao Sun

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