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https://issues.apache.org/jira/browse/LUCENE-3237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13149555#comment-13149555
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Simon Willnauer commented on LUCENE-3237:
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Shai, I think we should close this. we can still reopen if we run into issues?
> FSDirectory.fsync() may not work properly
> -----------------------------------------
>
> Key: LUCENE-3237
> URL: https://issues.apache.org/jira/browse/LUCENE-3237
> Project: Lucene - Java
> Issue Type: Bug
> Components: core/store
> Reporter: Shai Erera
> Fix For: 3.5, 4.0
>
>
> Spinoff from LUCENE-3230. FSDirectory.fsync() opens a new RAF, sync() its
> FileDescriptor and closes RAF. It is not clear that this syncs whatever was
> written to the file by other FileDescriptors. It would be better if we do
> this operation on the actual RAF/FileOS which wrote the data. We can add
> sync() to IndexOutput and FSIndexOutput will do that.
> Directory-wise, we should stop syncing on file names, and instead sync on the
> IOs that performed the write operations.
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