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Posted to dev@lucene.apache.org by "Nat (JIRA)" <ji...@apache.org> on 2008/01/13 18:06:34 UTC
[jira] Commented: (LUCENE-753) Use NIO positional read to avoid
synchronization in FSIndexInput
[ https://issues.apache.org/jira/browse/LUCENE-753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12558425#action_12558425 ]
Nat commented on LUCENE-753:
----------------------------
I think bufsize has way much bigger impact than the implementation. I found that 64KB buffer size is at least 5-6 times faster than 1KB. Should we tune this parameter instead for maximum performance.
> 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
> Attachments: FileReadTest.java, FileReadTest.java, 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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