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https://issues.apache.org/jira/browse/HADOOP-18117?focusedWorklogId=726256&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-726256
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ASF GitHub Bot logged work on HADOOP-18117:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 14/Feb/22 12:12
Start Date: 14/Feb/22 12:12
Worklog Time Spent: 10m
Work Description: mohan3d commented on a change in pull request #3970:
URL: https://github.com/apache/hadoop/pull/3970#discussion_r805781663
##########
File path: hadoop-tools/hadoop-distcp/src/site/markdown/DistCp.md.vm
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@@ -363,6 +363,7 @@ Command Line Options
| `-xtrack <path>` | Save information about missing source files to the
specified path. | This option is only valid with `-update` option. This is an
experimental property and it cannot be used with `-atomic` option. |
| `-direct` | Write directly to destination paths | Useful for avoiding
potentially very expensive temporary file rename operations when the
destination is an object store |
| `-useiterator` | Uses single threaded listStatusIterator to build listing |
Useful for saving memory at the client side. Using this option will ignore the
numListstatusThreads option |
+| `-updateRootDirectoryAttributes` | Update root directory attributes (eg
permissions, ownership ...) | Useful if you need to enforce root directory
attributes update when using distcp |
Review comment:
@ferhui should I re-work the internal code so everything is `updateRoot`
instead of `updateRootDirectoryAttributes` or only the enduser `distcp` tool?
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Issue Time Tracking
-------------------
Worklog Id: (was: 726256)
Time Spent: 1h 40m (was: 1.5h)
> Add an option to preserve root directory permissions
> ----------------------------------------------------
>
> Key: HADOOP-18117
> URL: https://issues.apache.org/jira/browse/HADOOP-18117
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Mohanad Elsafty
> Assignee: Mohanad Elsafty
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> 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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