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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-5809) Enhance distcp to support preserving HDFS ACLs.
Date Wed, 07 May 2014 07:45:53 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-5809?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chris Nauroth updated MAPREDUCE-5809:
-------------------------------------

    Attachment: MAPREDUCE-5809.4.patch

I'm attaching patch v4.  This implements Nicholas's suggestion to store the ACLs in the copy
listing file for use by {{CopyCommitter}}.  Additional changes to this patch will come after
we resolve HDFS-6326.

bq. If we cannot change FileStatus for backwards-compatibility, how about add new FileSystem
methods such as listStatusWithACL(..) which returns FileStatusWithACL?

I'd like to have a follow-up discussion about possibly adding batch APIs to improve distcp
performance, and this is one of them that I had in mind.  Can we please postpone this until
later, since it's a performance optimization and not a correctness issue?  The current patch
is already large, and adding new API definitions and the RPC calls to back them would likely
double it.

> Enhance distcp to support preserving HDFS ACLs.
> -----------------------------------------------
>
>                 Key: MAPREDUCE-5809
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5809
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: distcp
>    Affects Versions: 2.4.0
>            Reporter: Chris Nauroth
>            Assignee: Chris Nauroth
>         Attachments: MAPREDUCE-5809.1.patch, MAPREDUCE-5809.2.patch, MAPREDUCE-5809.3.patch,
MAPREDUCE-5809.4.patch
>
>
> This issue tracks enhancing distcp to add a new command-line argument for preserving
HDFS ACLs from the source at the copy destination.



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