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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/09/17 09:42:22 UTC

[jira] [Assigned] (SPARK-17574) Cache ShuffleExchange RDD when the exchange is reused

     [ https://issues.apache.org/jira/browse/SPARK-17574?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-17574:
------------------------------------

    Assignee: Apache Spark

> Cache ShuffleExchange RDD when the exchange is reused
> -----------------------------------------------------
>
>                 Key: SPARK-17574
>                 URL: https://issues.apache.org/jira/browse/SPARK-17574
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>            Reporter: Liang-Chi Hsieh
>            Assignee: Apache Spark
>
> We have the rule ReuseExchange to reuse exchange in the physical plan. However, for a ShuffleExchange we still need to retrieve remote blocks again when the shuffle exchange is reused. We can cache the RDD of the reused ShuffleExchange to avoid transferring remote blocks again.



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