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Thread: Commented: (HADOOP-730) Local file system uses copy to implement rename




Commented: (HADOOP-730) Local file system uses copy to implement rename
country flaguser name
United States
2007-10-03 12:37:51
    [ https://issues.apache.org/jira/browse/
HADOOP-730?page=com.atlassian.jira.plugin.system.issuetabpan
els:comment-tabpanel#action_12532173 ] 

Doug Cutting commented on HADOOP-730:
-------------------------------------

> 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: http
s://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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