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https://issues.apache.org/jira/browse/LUCENE-932?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12504365
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Michael McCandless commented on LUCENE-932:
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Actually when you open an IndexWriter with "create=true" this is
exactly what's done (just write an empty segments file).
It then uses the deleter to delete all the now un-referenced files,
which will handle retrying if files are open, etc.
The windows issue (can't just rm * from FSDirectory) was part of the
motivation for this (for LUCENE-773).
> delete complete index
> ---------------------
>
> Key: LUCENE-932
> URL: https://issues.apache.org/jira/browse/LUCENE-932
> Project: Lucene - Java
> Issue Type: Wish
> Reporter: Yonik Seeley
> Priority: Minor
>
> A way to remove an index (that's more efficient than delete *:*) is needed.
> Removing the index directory isn't portable since you can't delete open files
> on Windows.
> Creating a new segments file with no segments in it would probably be the way
> to go.
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