Mohanad Elsafty created HDFS-16448:
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Summary: Add one option to preserve root directory permissions
Key: HDFS-16448
URL: https://issues.apache.org/jira/browse/HDFS-16448
Project: Hadoop HDFS
Issue Type: Improvement
Components: distcp, tools
Reporter: Mohanad Elsafty
As mentioned in https://issues.apache.org/jira/browse/HADOOP-15211
If *-update* or *-overwrite* is being passed when *distcp* used, the root
directory will be skipped in two occasions (CopyListing#doBuildListing &
CopyCommitter#preserveFileAttributesForDirectories), which will ignore root
directory's attributes.
We face the same issue when distcp huge data between clusters and it takes too
much effort to update root directories attributes manually.
>From the earlier ticket it's obvious why this behaviour is there, but sometime
>we need to enforce root directory update hence I will add a new option for
>distcp to enable someone (who understands the need of this and know what they
>are doing) to enforce the update of root directory's attributes (permissions,
>ownership, ...)
It should be simple one, something like this
{code:java}
$ hadoop distcp -p -update -updateRootDirectoryAttributes /a/b/c /a/b/d {code}
This behaviour is optional and will be *false* by default. (it should not
affect existing *distcp* users).
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