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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-17574) Cache ShuffleExchange RDD when the exchange is reused
Date Sat, 17 Sep 2016 09:42:22 GMT

    [ https://issues.apache.org/jira/browse/SPARK-17574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15498659#comment-15498659
] 

Apache Spark commented on SPARK-17574:
--------------------------------------

User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/15128

> 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
>
> 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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