Translations:Ansys/2852/en: Difference between revisions

As of Sep1,2022 each researcher can run 4 jobs using a total of 188 anshpc (plus 4 anshpc per job).  Thus any of the following simultaneously running maximum uniform job size combinations are possible: single 192 core job, two 98 core jobs, three 66 core jobs, or four 51 core jobs according to ( (188 + 4 * num_jobs) / num_jobs ).  Since typically best parallel performance is achieved using all cores on a compute node (aka full node) one can determine the maximum number of full nodes by dividing the total anshpc cores by the compute node size.   For example, consider  graham which has many 32 core (broadwell) and some 44 core (cascade) compute nodes.  The maximum number of nodes per job one could request when using full 32 core nodes would be: 192/32=6, 98/32=3, 66/32=2 or 51/32=1 to run 1, 2, 3 or 4 simultaneous jobs respectively. For any given compute node size, on any cluster, the number of compute nodes can be calculated from ( 188 anshpc + (4 anshpc/job * num_jobs) ) / cores_per_node ) then rounding down any remainder.