[GE users] prolog script for parallel jobs

Andy Schwierskott andy.schwierskott at sun.com
Wed Jan 30 13:14:12 GMT 2008


Hi,

you can't run prolog scripts on the slvaes nodes.

Since SGE starts its own sshd (and does not use the system wide sshd)
perhaps there is a possibility to use a different limits.conf for the sshd
started by SGE by using a command line argument for the sshd startup?

If this is not possible and you are anyhow using a modified sshd (or
consider to do it) to get proper accounting when ssh is used for starting
parallel jobs it might be possible to do further modifications to sshd to
disregard that setting in limits.conf.

In case you are unaware why there is a motivation for a sshd patch please
see Ron's and Rayson's presentation on it:

   http://gridengine.sunsource.net/download/workshop10-12_09_07/SGE-WS2007-openSSHTightIntegration_RonChen.pdf

Regards,
Andy



On Wed, 30 Jan 2008, Neeraj Chourasia wrote:

> hello all,
>
>   Is there a way to run prolog or some kind of script under root privileges 
> in parallel kind of job? What i have observed is that prolog script runs on 
> master node and not on slaves.
> Actually i want to disable user login directly onto compute nodes, and only 
> make it possible via SGE. Since prolog script runs under root privileges, i 
> can change say /etc/security/limits.conf for the time job is being run and 
> hence can restrict normal SSH(without SGE).
>
> Can i run prolog on slaves or is there any other way to restrict normal user 
> login?
>
> -Neeraj
>
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