Hi all, On Wednesday 17 April 2013 09:32:21 Herbert Fruchtl wrote: > >> >"Owned compute" has some advantages over "rented compute." In general, > >> >the control one has over one's owned resources enables applications to > >> >run with greater performance. Some optimizations just demand root > >> >access! > > > > As someone who has been Scientific Computing/HPC System Admin, I can > > tell you this is a complete myth. > > You need at least access to the person with root access. If (s)he's a > colleague who needs to keep 10 more users in the department happy, you can > sit down and find a solution if your program doesn't work. Try to convince > Amazon that you need SHMMAX increased, and that their default processor > affinity settings slow your code down. > > Herbert
I agree with Herbert here. Even if it is not something like SHMMAX etc., try and convince admins on a system you are not root that a global installation of a heavily used program does make sense (that is the easier bit) and ask them to install a group for that program. Try then to get users in that group. I am currently looking into that problem and I get stalled at the group-installation level here. Fortunately, as we are members of that facility there is light at the end of the tunnel. I doubt something like that could be done with Cloud Computing or other type or remote hosting. All the best from a grey London Jörg -- ************************************************************* Jörg Saßmannshausen University College London Department of Chemistry Gordon Street London WC1H 0AJ email: [email protected] web: http://sassy.formativ.net Please avoid sending me Word or PowerPoint attachments. See http://www.gnu.org/philosophy/no-word-attachments.html _______________________________________________ Beowulf mailing list, [email protected] sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
