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https://issues.apache.org/jira/browse/SPARK-7078?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14525528#comment-14525528
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Apache Spark commented on SPARK-7078:
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User 'JoshRosen' has created a pull request for this issue:
https://github.com/apache/spark/pull/5868
> Cache-aware binary processing in-memory sort
> --------------------------------------------
>
> Key: SPARK-7078
> URL: https://issues.apache.org/jira/browse/SPARK-7078
> Project: Spark
> Issue Type: New Feature
> Components: Shuffle
> Reporter: Reynold Xin
> Assignee: Josh Rosen
>
> A cache-friendly sort algorithm that can be used eventually for:
> * sort-merge join
> * shuffle
> See the old alpha sort paper:
> http://research.microsoft.com/pubs/68249/alphasort.doc
> Note that state-of-the-art for sorting has improved quite a bit, but we can
> easily optimize the sorting algorithm itself later.
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