[jira] Updated: (HADOOP-3939) DistCp should support an option for deleting non-existing files.

["Tsz Wo (Nicholas), SZE (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-3939?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tsz Wo (Nicholas), SZE updated HADOOP-3939:
-------------------------------------------

    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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