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https://issues.apache.org/jira/browse/HADOOP-730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12575853#action_12575853
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Tsz Wo (Nicholas), SZE commented on HADOOP-730:
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+1 codes look good
> Local file system uses copy to implement rename
> -----------------------------------------------
>
> Key: HADOOP-730
> URL: https://issues.apache.org/jira/browse/HADOOP-730
> Project: Hadoop Core
> Issue Type: Improvement
> Components: fs
> Affects Versions: 0.8.0
> Reporter: Owen O'Malley
> Assignee: Chris Douglas
> Fix For: 0.17.0
>
> Attachments: 730-0.patch, 730-1.patch, 730-2.patch
>
>
> 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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