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From "Johan Oskarson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-287) Speed up SequenceFile sort with memory reduction
Date Thu, 07 Sep 2006 17:52:25 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-287?page=comments#action_12433179 ] 
            
Johan Oskarson commented on HADOOP-287:
---------------------------------------

Benjamin:
Would it be possible to look into what broke in the latest patch?

> Speed up SequenceFile sort with memory reduction
> ------------------------------------------------
>
>                 Key: HADOOP-287
>                 URL: http://issues.apache.org/jira/browse/HADOOP-287
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: io
>    Affects Versions: 0.3.2
>            Reporter: Benjamin Reed
>         Assigned To: Doug Cutting
>             Fix For: 0.6.0
>
>         Attachments: s.patch, zoom-sort.patch, zoom-sort.patch
>
>
> I replaced the merge sort with a quick sort and it yielded approx 30% improvement in
sort time. It also reduced the memory requirement for sorting because the sort is done in
place.

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