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From "Hongyuan Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14570) Distcp --dry-run switch to show what files would copy like rsync
Date Thu, 29 Jun 2017 06:40:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14570?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16067844#comment-16067844
] 

Hongyuan Li commented on HADOOP-14570:
--------------------------------------

Sorry to interrupt you, can you list your request more obviously? how about making it as a
list?

> Distcp --dry-run switch to show what files would copy like rsync
> ----------------------------------------------------------------
>
>                 Key: HADOOP-14570
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14570
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: tools/distcp
>    Affects Versions: 2.7.3
>         Environment: HDP 2.5.0, HDP 2.6.0 with Kerberos
>            Reporter: Hari Sekhon
>
> Feature Request to add -n / --dry-run switches to print what files would be copied from
which source to which destination paths without actually launching the maps to do the copying.
> This is useful for testing exclusion -filters and also to see the destination paths as
the -update/-overwrite behaviour of not copying the top level source folder can trip up even
those of us who know the behaviour difference so it's nice to be able to print as a first
step without doing the operation. This is what linux admins have been doing forever with rsync.



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