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https://issues.apache.org/jira/browse/LUCENE-5588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13964729#comment-13964729
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Uwe Schindler commented on LUCENE-5588:
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In fact. it also does not work on Linux, see
http://permalink.gmane.org/gmane.comp.standards.posix.austin.general/6952
You have to open the file for read and then call fsync. I will think about a
patch.
> We should also fsync the directory when committing
> --------------------------------------------------
>
> Key: LUCENE-5588
> URL: https://issues.apache.org/jira/browse/LUCENE-5588
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/store
> Reporter: Uwe Schindler
> Fix For: 4.8, 5.0
>
>
> Since we are on Java 7 now and we already fixed FSDir.sync to use FileChannel
> (LUCENE-5570), we can also fsync the directory (at least try to do it).
> Unlike RandomAccessFile, which must be a regular file, FileChannel.open() can
> also open a directory:
> http://stackoverflow.com/questions/7694307/using-filechannel-to-fsync-a-directory-with-nio-2
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