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From "Benjamin Reed (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-287) Speed up SequenceFile sort with memory reduction
Date Thu, 08 Jun 2006 17:36:31 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-287?page=all ]

Benjamin Reed updated HADOOP-287:
---------------------------------

    Attachment: zoom-sort.patch

My previous patch had two minor typos that gave incorrect results. This patch should work.

> Speed up SequenceFile sort with memory reduction
> ------------------------------------------------
>
>          Key: HADOOP-287
>          URL: http://issues.apache.org/jira/browse/HADOOP-287
>      Project: Hadoop
>         Type: Improvement

>   Components: io
>     Versions: 0.3.2
>     Reporter: Benjamin Reed
>  Attachments: 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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