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https://issues.apache.org/jira/browse/LUCENE-4848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13608021#comment-13608021
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Uwe Schindler commented on LUCENE-4848:
---------------------------------------
AsyncFSDirectory does not need an async output. In Lucene we are fine to use
RandomAccessFile to write as this is never done from several thraeds. Writing
an index is always a sequential operation, theoretically an OutputStream would
be enough (but we still have to seek sometimes, so this is not completely
true). So a channel based FSIndexOutput is not needed, we can stick with the
one that already exists. And because of this I removed the split.
I opened a new issue for AsyncFS: LUCENE-4864
> Fix Directory implementations to use NIO2 APIs
> ----------------------------------------------
>
> Key: LUCENE-4848
> URL: https://issues.apache.org/jira/browse/LUCENE-4848
> Project: Lucene - Core
> Issue Type: Task
> Reporter: Michael Poindexter
> Assignee: Uwe Schindler
> Priority: Minor
> Attachments: jdk7directory.zip, LUCENE-4848-MMapDirectory.patch,
> LUCENE-4848.patch, LUCENE-4848.patch, LUCENE-4848.patch, LUCENE-4848.patch,
> LUCENE-4848.patch, LUCENE-4848.patch, LUCENE-4848.patch, LUCENE-4848.patch.txt
>
>
> I have implemented 3 Directory subclasses using NIO2 API's (available on
> JDK7). These may be suitable for inclusion in a Lucene contrib module.
> See the mailing list at http://lucene.markmail.org/thread/lrv7miivzmjm3ml5
> for more details about this code and the advantages it provides.
> The code is attached as a zip to this issue. I'll be happy to make any
> changes requested. I've included some minimal smoke tests, but any help in
> how to use the normal Lucene tests to perform more thorough testing would be
> appreciated.
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