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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/07/17 15:31:20 UTC

[jira] [Commented] (SPARK-16593) Provide a pre-fetch mechanism to accelerate shuffle stage.

    [ https://issues.apache.org/jira/browse/SPARK-16593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15381391#comment-15381391 ] 

Apache Spark commented on SPARK-16593:
--------------------------------------

User 'f7753' has created a pull request for this issue:
https://github.com/apache/spark/pull/14239

> Provide a pre-fetch mechanism to accelerate  shuffle stage.
> -----------------------------------------------------------
>
>                 Key: SPARK-16593
>                 URL: https://issues.apache.org/jira/browse/SPARK-16593
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>            Reporter: Biao Ma
>            Priority: Minor
>              Labels: features
>
> Currently, the `NettyBlockRpcServer` will reading data through BlockManager, while the block is not cached in memory, the data should be read from DISK first, then into MEM. I wonder if we implement a mechanism add a message contains the blockIds that the same as the openBlock message but one loop ahead, then the `NettyBlockRpcServer ` will load the block ready for transfer to  the reduce side.



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