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Posted to common-dev@hadoop.apache.org by "Owen O'Malley (JIRA)" <ji...@apache.org> on 2007/05/11 20:19:15 UTC

[jira] Commented: (HADOOP-1346) Provide alternatives to merge sort while sorting map output values in memory

    [ https://issues.apache.org/jira/browse/HADOOP-1346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12495114 ] 

Owen O'Malley commented on HADOOP-1346:
---------------------------------------

-1

The in memory sort is a negligible portion of the time. Allowing choices will increase the complexity of the system while providing very little benefit.

> Provide alternatives to merge sort while sorting map output values in memory
> ----------------------------------------------------------------------------
>
>                 Key: HADOOP-1346
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1346
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.12.3
>            Reporter: Gautam Kowshik
>         Assigned To: Gautam Kowshik
>
> Currently we have only do a merge sort while sorting map output. We can have alternatives to this for the user to choose from, in particular, QuickSort could provide a good improvement.

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