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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Reopened: (HADOOP-287) Speed up SequenceFile sort with memory reduction
Date Tue, 01 Aug 2006 17:45:16 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-287?page=all ]

Doug Cutting reopened HADOOP-287:
---------------------------------

             
I just reverted this.

> 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: 0.5.0
>
>         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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