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Posted to issues@spark.apache.org by "Takuya Ueshin (JIRA)" <ji...@apache.org> on 2015/05/22 12:10:17 UTC

[jira] [Created] (SPARK-7826) Suppress extra calling getCacheLocs.

Takuya Ueshin created SPARK-7826:
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             Summary: Suppress extra calling getCacheLocs.
                 Key: SPARK-7826
                 URL: https://issues.apache.org/jira/browse/SPARK-7826
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
            Reporter: Takuya Ueshin


There are too many extra call method {{getCacheLocs}} for {{DAGScheduler}}, which includes Akka communication.
To improve {{DAGScheduler}} performance, suppress extra calling the method.

In my application with over 1200 stages, the execution time became 3.8 min from 8.5 min with my patch.



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