Am 31.01.2012 um 06:33 schrieb Rayson Ho: > On Mon, Jan 30, 2012 at 11:33 PM, Tom Bryan <tom...@cisco.com> wrote: >> For our use, yes, spawn_multiple makes sense. We won't be spawning lots and >> lots of jobs in quick succession. We're using MPI as an robust way to get >> IPC as we spawn multiple child processes while using SGE to help us with >> load balancing our compute nodes. > > Note that spawn_multiple is not going to buy you anything as SGE and > Open Grid Scheduler (and most other batch systems) do not handle > dynamic slot allocation. There is no way to change the number of slots > that are used by a job once it's running.
Agreed, the problem is first to phrase it in a submission command like: I need 2 cores for 2 hours, 4 cores for one hour and finally 1 core for 8 hours. And the application must act accordingly. This all sounds more like a real-time queuing system and application, where this can be ensured to happen in time. -- Reuti > For this reason, I don't recall seeing any users using spawn_multiple > (and also, IIRC, the call was introduced in MPI-2)... and you might > want to make sure that normal MPI jobs work before debuging a > spawn_multiple() job. > > Rayson > > ================================= > Grid Engine / Open Grid Scheduler > http://gridscheduler.sourceforge.net/ > > Scalable Grid Engine Support Program > http://www.scalablelogic.com/ > > >> >>> Anyway: >>> do you see on the master node of the parallel job in: >> >> Yes, I should have included that kind of output. I'll have to run it again >> with the cols option, but I used pstree to see that I have mpitest --child >> processes as children of orted by way of sge_shepherd and sge_execd. >> >> Thanks, >> ---Tom >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users > > > > -- > Rayson > > ================================================== > Open Grid Scheduler - The Official Open Source Grid Engine > http://gridscheduler.sourceforge.net/ > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
