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https://issues.apache.org/jira/browse/HADOOP-3939?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo (Nicholas), SZE updated HADOOP-3939:
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Release Note: Added a new option -delete to DistCp so that if the
files/directories exist in dst but not in src will be deleted. It uses FsShell
to do delete, so that it will use trash if the trash is enable. (was: Added a
new optopm -delete to DistCp so that if the files/directories exist in dst but
not in src will be deleted. It uses FsShell to do delete, so that it will use
trash if the trash is enable.)
> DistCp should support an option for deleting non-existing files.
> ----------------------------------------------------------------
>
> Key: HADOOP-3939
> URL: https://issues.apache.org/jira/browse/HADOOP-3939
> Project: Hadoop Core
> Issue Type: New Feature
> Components: tools/distcp
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Fix For: 0.19.0
>
> Attachments: 3939_20080825.patch, 3939_20080825b.patch,
> 3939_20080826.patch, 3939_20080828.patch, 3939_20080829.patch,
> 3939_20080829b.patch
>
>
> One use case of DistCp is to sync two directories. Currently, DistCp has an
> -update option for overwriting dst files if src is different from dst.
> However, it is not enough for sync. If there are some files in dst but not
> exist in src, there is no easy way to delete them. We should add a new
> option, say -delete, so that DistCp will delete the non-existing in dst.
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