Hari Sekhon created HADOOP-14570:
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Summary: 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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