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From "Matthias Boehm (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SYSTEMML-2218) Avoid unnecessary repartitioning after RDD parallelize
Date Sat, 31 Mar 2018 01:42:00 GMT
Matthias Boehm created SYSTEMML-2218:
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             Summary: Avoid unnecessary repartitioning after RDD parallelize
                 Key: SYSTEMML-2218
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2218
             Project: SystemML
          Issue Type: Task
            Reporter: Matthias Boehm


There are cases, where spark mapmm instructions to a repartition of the input RDD in order
to ensure output partition sizes <2GB. If the input originates from a RDD parallelize this
causes unnecessary shuffle because the parallelize could already bring it into the right number
of partitions. 



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