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Posted to issues@spark.apache.org by "Akshat Aranya (JIRA)" <ji...@apache.org> on 2015/05/21 19:39:17 UTC

[jira] [Created] (SPARK-7795) Speed up task serialization in standalone mode

Akshat Aranya created SPARK-7795:
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             Summary: Speed up task serialization in standalone mode
                 Key: SPARK-7795
                 URL: https://issues.apache.org/jira/browse/SPARK-7795
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
    Affects Versions: 1.3.1
            Reporter: Akshat Aranya


My experiments with scheduling very short tasks in standalone cluster mode indicated that a significant amount of time was being spent in scheduling the tasks (>500ms for 256 tasks). I found that most of the time was being spent in creating a new instance of serializer for each task. Changing this to just one serializer brought down the scheduling time to 8ms.



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