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https://issues.apache.org/jira/browse/HADOOP-730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12532173
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Doug Cutting commented on HADOOP-730:
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> Couldn't it try the renameTo() operation and if it fails then fallback to the
> slower copy&delete method?
Sounds good to me. That might provide a nice speedup too. Care to provide a
patch?
> Local file system uses copy to implement rename
> -----------------------------------------------
>
> Key: HADOOP-730
> URL: https://issues.apache.org/jira/browse/HADOOP-730
> Project: Hadoop
> Issue Type: Bug
> Components: fs
> Affects Versions: 0.8.0
> Reporter: Owen O'Malley
> Assignee: Owen O'Malley
>
> There is a variable LocalFileSystem.useCopyForRename that is set to true.
> When true, the local file system will implement rename as a copy followed by
> a delete. This is likely a performance problem. Is there a reason that
> useCopyForRename is set?
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