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https://issues.apache.org/jira/browse/LUCENE-753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12627225#action_12627225
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Michael McCandless commented on LUCENE-753:
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I just committed revision 690539, adding NIOFSDirectory. I will leave this
open, but move off of 2.4, until we can get similar performance gains on
Windows...
> Use NIO positional read to avoid synchronization in FSIndexInput
> ----------------------------------------------------------------
>
> Key: LUCENE-753
> URL: https://issues.apache.org/jira/browse/LUCENE-753
> Project: Lucene - Java
> Issue Type: New Feature
> Components: Store
> Reporter: Yonik Seeley
> Assignee: Michael McCandless
> Attachments: FileReadTest.java, FileReadTest.java, FileReadTest.java,
> FileReadTest.java, FileReadTest.java, FileReadTest.java, FileReadTest.java,
> FSDirectoryPool.patch, FSIndexInput.patch, FSIndexInput.patch,
> LUCENE-753.patch, LUCENE-753.patch, LUCENE-753.patch, LUCENE-753.patch,
> LUCENE-753.patch, lucene-753.patch, lucene-753.patch
>
>
> As suggested by Doug, we could use NIO pread to avoid synchronization on the
> underlying file.
> This could mitigate any MT performance drop caused by reducing the number of
> files in the index format.
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