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From Adarsh Sharma <adarsh.sha...@orkash.com>
Subject Re: Granting Access
Date Fri, 29 Oct 2010 08:41:02 GMT
Pavan wrote:
> IMHO, there is no straight forward way of doing this in Hadoop except that
> you need to install Hadoop components such as MapReduce and HDFS as
> different users . This is an ongoing development priority.
> The available access related configuration options (before Kerberos V5) are
> :
>
>    - dfs.permissions = true|false
>    - dfs.web.ugi = webuser,webgroup
>    - dfs.permissions.supergroup = supergroup
>    - dfs.upgrade.permission = 777
>    - dfs.umask = 022
>
> However, with Kerberos V5 availability there seems to be some hope wrt user
> authentication. In this model, HDFS uses the same permissions model as
> before but a user can no longer trivially impersonate other users and there
> is provisioning for ACLs to specify who can do what wrt jobs, tasks
> (authorization).
>
> Perhaps, you can try Yahoo's distribution or Cloudera's CDH3b3 to evaluate
> current status on this.
>
> ~
> Pavan
>
>
> On Fri, Oct 29, 2010 at 11:47 AM, Adarsh Sharma <adarsh.sharma@orkash.com>wrote:
>
>   
>> Hi all,
>> As all of us know that Hadoop considers the user who starts the hadoop
>> cluster as  superuser.
>> It provides all access to HDFS to that user.
>>
>> But know I want to know that how we can R/W access to new user for e.g  Tom
>> to access HDFS.
>> Is there any command or we can write code for it. I read the tutorial but
>> not able to succed .
>>
>> Thanks  in Advance
>>
>>     
>
>   
I resolved the problem.
Thanks you all !


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