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From "Digy (JIRA)" <>
Subject [Lucene.Net] [jira] [Created] (LUCENENET-425) MMapDirectory implementation
Date Mon, 13 Jun 2011 18:40:51 GMT
MMapDirectory implementation

                 Key: LUCENENET-425
             Project: Lucene.Net
          Issue Type: New Feature
    Affects Versions: Lucene.Net 2.9.4g
            Reporter: Digy
            Priority: Trivial
             Fix For: Lucene.Net 2.9.4g
         Attachments: MMapDirectory.patch

Since this is not a direct port of, I'll put it under "Support" and implement
MMapDirectory as 
public class MMapDirectory:Lucene.Net.Support.MemoryMappedDirectory:Lucene.Net.Support.MemoryMappedDirectory
If a Mem-Map can not be created(for ex, if the file is too big to fit in 32 bit address range),
it will default to FSDirectory.FSIndexInput

In my tests, I didn't see any performance gain in 32bit environment and I consider it as better
then nothing. 

I would be happy if someone could send test results on 64bit platform.


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