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Date: Tue, 20 Aug 2013 21:37:51 +0000 (UTC)
From: "Ryan Hennig (JIRA)" <jira@apache.org>
To: hdfs-dev@hadoop.apache.org
Message-ID: <JIRA.12664705.1377034605519.5799.1377034671609@arcas>
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Subject: [jira] [Created] (HDFS-5117) Allow the owner of an HDFS path to be
 a group
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Ryan Hennig created HDFS-5117:
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             Summary: Allow the owner of an HDFS path to be a group
                 Key: HDFS-5117
                 URL: https://issues.apache.org/jira/browse/HDFS-5117
             Project: Hadoop HDFS
          Issue Type: New Feature
          Components: hdfs-client
            Reporter: Ryan Hennig


At eBay, we have the need to associate some HDFS paths with a set of users with write access, a set of users with read-only access, and neither read or write to others.

The current model of POSIX-style permissions is nearly sufficient for this, except for the need of multiple writers.

One easy fix would be to allow the owner of a path to be a group, and then grant owner permissions to all members of that group.  I have verified that HDP 1.3 allows you to set the owner of a path to a group without error, but the owner permissions of that group are not given to members of the group.

I've created a relatively simple fix for this by modifying the "check" method in src/hdfs/org/apache/hadoop/hdfs/server/namenode/FSPermissionChecker.java and I am working on related changes to unit tests etc now.

- Ryan

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