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Posted to issues@tez.apache.org by "Tsuyoshi Ozawa (JIRA)" <ji...@apache.org> on 2015/07/08 17:20:04 UTC

[jira] [Created] (TEZ-2606) Cache-friendly data structure for sorting

Tsuyoshi Ozawa created TEZ-2606:
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             Summary: Cache-friendly data structure for sorting
                 Key: TEZ-2606
                 URL: https://issues.apache.org/jira/browse/TEZ-2606
             Project: Apache Tez
          Issue Type: Sub-task
            Reporter: Tsuyoshi Ozawa
            Assignee: Tsuyoshi Ozawa


Alphasort[1]  mentions prefix key sort is effective way. I'd like to suggest to change a layout of ring buffer to include prefix of key in meta data. This can improve the cache hit rate when sorting.

[1] Alphasort: http://dl.acm.org/citation.cfm?id=615237




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