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Posted to issues@spark.apache.org by "Reynold Xin (JIRA)" <ji...@apache.org> on 2015/04/23 09:32:38 UTC

[jira] [Created] (SPARK-7078) Cache-friendly in-memory sort on compact tuples

Reynold Xin created SPARK-7078:
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             Summary: Cache-friendly in-memory sort on compact tuples
                 Key: SPARK-7078
                 URL: https://issues.apache.org/jira/browse/SPARK-7078
             Project: Spark
          Issue Type: New Feature
            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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