Granting Permissions to HDFS

[Adarsh Sharma <ad...@orkash.com>]

Dear all,
I am listing all the HDFS delails through -fs shell. I know the 
superuser owns the privileges to list files. But know I want to grant 
all read and write privileges to two new users (for e. g  Tom and White ) .
 I read the HDFS Shell User guide that tells about *chmod, chown, chgrp* 
commands.
But I don't want to change users and groups.
Can someone Please help me to achieve this or it is possible in HDFS or not.

Thanks and Regards
Adarsh Sharma

Re: Granting Permissions to HDFS

[Hemanth Yamijala <yh...@gmail.com>]

Hi,

On Thu, Oct 28, 2010 at 5:11 PM, Adarsh Sharma <ad...@orkash.com> wrote:
> Dear all,
> I am listing all the HDFS delails through -fs shell. I know the superuser
> owns the privileges to list files. But know I want to grant all read and
> write privileges to two new users (for e. g  Tom and White ) .

Only these two - or you don't really care about permissions ?

> I read the HDFS Shell User guide that tells about *chmod, chown, chgrp*
> commands.
> But I don't want to change users and groups.
> Can someone Please help me to achieve this or it is possible in HDFS or not.

If I guess right that you want to restrict access to super-user and
two other users alone, but not all users, there's probably no easy way
out other than creating a new group with those two users and giving
that group permissions. HDFS permissions aren't fine-grained like ACLs
which can grant access to specific users irrespective of their group
membership.

Thanks
Hemanth
>
> Thanks and Regards
> Adarsh Sharma
>