-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 25/07/13 14:40, Mark Hahn wrote:
> do you really find users who decide to choose their own nodes? In the past yes, they've come from places who either haven't had a queuing system or who haven't use HPC before and haven't read the docs or been to the courses. > limiting ssh access, done right, can permit (c) and prevent (a). That's what we do. Users can login to nodes their jobs are on. I'm hoping that the aims of the Slurm PAM module to be able to move users SSHing into the node into the cgroup for their jobs will get implemented. That way if they do login and run stuff that impacts they'll only hurt their own jobs. > we don't really see (a) enough to worry about it (we're pretty big > on at least basic user inculcation...) and most of (b) I see is > actually not helped, since the rogue jobs are usually escapees, > rather than mis-aimed. Yeah, we see rogue jobs and have health check scripts that can fix them up for the simple cases (and alert us and take the node offline for others). That helps with having to deal with the emails from users asking why their jobs are running slower than usual. > I suppose you could charge by utime+stime rather than real time. That would mean a lot of extra hacking around as we're using Gold (with Torque and Moab) at the moment and will be moving to Slurm in the very near future (as it's what we run on our BG/Q), so we bend to their whim on charging. cheers! Chris - -- Christopher Samuel Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.org.au/ http://twitter.com/vlsci -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlHwss4ACgkQO2KABBYQAh8UywCgiFnVHUxTCAF8DPQkdMQCutD8 PuEAnRz91qSEQM1mfwZfBV7CsoVjZLk/ =+JDY -----END PGP SIGNATURE----- _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
