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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (SPARK-7884) Allow Spark shuffle APIs to be more customizable
Date Wed, 27 May 2015 00:57:18 GMT

     [ https://issues.apache.org/jira/browse/SPARK-7884?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Apache Spark reassigned SPARK-7884:
-----------------------------------

    Assignee:     (was: Apache Spark)

> Allow Spark shuffle APIs to be more customizable
> ------------------------------------------------
>
>                 Key: SPARK-7884
>                 URL: https://issues.apache.org/jira/browse/SPARK-7884
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>            Reporter: Matt Massie
>
> The current Spark shuffle has some hard-coded assumptions about how shuffle managers
will read and write data.
> The FileShuffleBlockResolver.forMapTask method creates disk writers by calling BlockManager.getDiskWriter.
This forces all shuffle managers to store data using the DiskBlockObjectWriter which read/write
data as record-oriented (preventing column-orient record writing).
> The BlockStoreShuffleFetcher.fetch method relies on the ShuffleBlockFetcherIterator that
assumes shuffle data is written using the BlockManager.getDiskWriter method and doesn't allow
for customization.



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