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https://issues.apache.org/jira/browse/SPARK-7884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14560241#comment-14560241
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Apache Spark commented on SPARK-7884:
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User 'massie' has created a pull request for this issue:
https://github.com/apache/spark/pull/6423
> 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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