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Posted to issues@spark.apache.org by "Hyukjin Kwon (JIRA)" <ji...@apache.org> on 2019/05/21 04:34:12 UTC

[jira] [Resolved] (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:all-tabpanel ]

Hyukjin Kwon resolved SPARK-16593.
----------------------------------
    Resolution: Incomplete

> 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: Lewin Ma
>            Priority: Minor
>              Labels: bulk-closed, 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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