On 06/19/2013 08:14 AM, Pavan Balaji wrote:

On 06/19/2013 05:13 AM, Lee, Eibhlin wrote:

...

Jim and Pavan will be glad to hear I have now switched to Hydra. I am able to run cpi as user on multiple machines. I am also able to run cpi as root on one machine. However, I am having difficulty setting up ssh properly so that I can run cpi as root on multiple machines.

Excellent. Once you login as root, can you ssh into the other nodes? You'll need to set that up first.

...

How can I force a process to run as root on another machine?

Once the above ssh is setup, you don't need to do anything special. Just login as root and run your application.

-- Pavan

I would caution that passwordless ssh for root is not a secure thing. It may be alright if you keep your cluster off the Internet. Maybe the cluster is dedicated to run the MPI A/D converter program? Some people/sites disable remote root logins (or any direct root logins). So, Eibhlin may want to check if any of these restrictive mechanisms exist in his cluster's nodes: http://www.centos.org/docs/4/4.5/Security_Guide/s2-wstation-privileges-noroo... I hope this helps, Gus Correa