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https://issues.apache.org/jira/browse/LUCENE-2650?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir updated LUCENE-2650:
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Fix Version/s: 3.1
> improve windows defaults in FSDirectory
> ---------------------------------------
>
> Key: LUCENE-2650
> URL: https://issues.apache.org/jira/browse/LUCENE-2650
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Store
> Affects Versions: 4.0
> Reporter: Robert Muir
> Assignee: Robert Muir
> Fix For: 3.1, 4.0
>
> Attachments: LUCENE-2650.patch, LUCENE-2650.patch
>
>
> Currently windows defaults to SimpleFSDirectory, but this is a problem due to
> the synchronization.
> I have been benchmarking queries *sequentially* and was pretty surprised at
> how much faster
> MMapDirectory is, for example for cases that do many seeks.
> I think we should change the defaults for windows as such:
> if (WINDOWS and UNMAP_SUPPORTED and 64-bit)
> use MMapDirectory
> else
> use SimpleFSDirectory
> I think we should just consider doing this for 4.0 only and see how it goes.
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