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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] Updated: (LUCENE-753) Use NIO positional read to avoid synchronization in FSIndexInput
Date Thu, 21 Dec 2006 22:47:22 GMT
     [ http://issues.apache.org/jira/browse/LUCENE-753?page=all ]

Yonik Seeley updated LUCENE-753:
--------------------------------

    Attachment: FileReadTest.java

Attaching test that reads a file in different ways, either random access or serially, from
a number of threads.


> Use NIO positional read to avoid synchronization in FSIndexInput
> ----------------------------------------------------------------
>
>                 Key: LUCENE-753
>                 URL: http://issues.apache.org/jira/browse/LUCENE-753
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Store
>            Reporter: Yonik Seeley
>         Attachments: FileReadTest.java, FSIndexInput.patch, FSIndexInput.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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