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From Todd Lipcon <t...@cloudera.com>
Subject Re: accounts permission on hadoop
Date Wed, 01 Sep 2010 16:08:22 GMT
On Tue, Aug 31, 2010 at 5:28 PM, Allen Wittenauer
<awittenauer@linkedin.com> wrote:
>
> On Aug 31, 2010, at 2:43 PM, Edward Capriolo wrote:
>
>> On Tue, Aug 31, 2010 at 5:07 PM, Gang Luo <lgpublic@yahoo.com.cn> wrote:
>>> Hi all,
>>> I am the administrator of a hadoop cluster. I want to know how to specify a
>>> group a user belong to. Or hadoop just use the group/user information from the
>>> linux system it runs on? For example, if a user 'smith' belongs to a group
>>> 'research' in the linux system. what is his account and group on HDFS?
>>>
>>>
>>
>> Currently hadoop gets its user groups from the posix user/groups.
>
> ... based upon what the client sends, not what the server knows.

Not anymore in trunk or the security branch - now it's mapped on the
server side with a configurable resolver class.

-Todd
-- 
Todd Lipcon
Software Engineer, Cloudera

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