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Posted to common-dev@hadoop.apache.org by "Johan Oskarson (JIRA)" <ji...@apache.org> on 2006/09/07 19:52:25 UTC
[jira] Commented: (HADOOP-287) Speed up SequenceFile sort with
memory reduction
[ 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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