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From "Gopal V (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (TEZ-2606) Cache-friendly data structure for sorting
Date Wed, 15 Jul 2015 06:02:04 GMT

     [ https://issues.apache.org/jira/browse/TEZ-2606?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gopal V resolved TEZ-2606.
--------------------------
    Resolution: Done

Resolving this issue for now, the prefix key sort is already in 0.7.x and is available to
any comparator which implements {{ProxyComparator}}

> 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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