Hi, >> How can I submit job for 10 CPU? > nodes=2:ppn=4+1:ppn=2 will do the trick When I saw this I just had to ask: Does it make sense to have a general attribute CPUs? As in: "I just want 10 CPUs, but I don't care how you allocate them". The scheduler will then decide how those 10 CPUs are allocated. Cheers, Ronny