I have to following problem: On the cluster I'm working, we use torque to submit jobs. The minimum number of processors one can get is 24 (since this is one node). Right now, I have some programs that do not need 24 procs. The programs are then launched via aprun (it's a launcher that basically does the same thing as mpirun)
My question: Does anybody know what happens if I submit a job which calls aprun several times, but with the number of procs per aprun < 24. Eg two times with 12 processors each. Is it guaranteed that these jobs will be executed in parallel, or will the first one finish and then the second one start (which would mean, that 12 cores stay idle all the time).
Hope somebody knows that :)