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[SPARK-2774] Set preferred locations for reduce tasks #4576

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wants to merge 3 commits into from
Closed

[SPARK-2774] Set preferred locations for reduce tasks #4576

wants to merge 3 commits into from

Commits on Feb 12, 2015

  1. Set preferred locations for reduce tasks 

    This is another attempt at apache#1697 addressing some of the earlier concerns.
This adds a couple of thresholds based on number map and reduce tasks
beyond which we don't use preferred locations for reduce tasks.

This patch also fixes some bugs in DAGSchedulerSuite where the MapStatus
objects created didn't have the right number of reducers set.
    @shivaram
    shivaram committed Feb 12, 2015
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  2. Fix style issues

    @shivaram
    shivaram committed Feb 12, 2015
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Commits on Feb 13, 2015

  1. Fix bug introduced by line length adjustment

    @shivaram
    shivaram committed Feb 13, 2015
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