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Posted to issues@spark.apache.org by "Davies Liu (JIRA)" <ji...@apache.org> on 2014/08/27 02:51:58 UTC

[jira] [Created] (SPARK-3239) Choose disks for spilling randomly

Davies Liu created SPARK-3239:
---------------------------------

             Summary: Choose disks for spilling randomly
                 Key: SPARK-3239
                 URL: https://issues.apache.org/jira/browse/SPARK-3239
             Project: Spark
          Issue Type: Improvement
          Components: PySpark
    Affects Versions: 1.1.0
            Reporter: Davies Liu


Currently, ExternalHashMerger spill data into disks in the same order crossing processes in same node, it will have IO contention.

It should choose the disks randomly.



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