Long geometry preprocessing time for a large amount of cpus

Orangade · October 30, 2023, 09:01

Hello,
I am trying to run a simulation of 70M cells, and for that reason I need to use at least 128 cores (16 cores per cpu) on my server to get reasonable time per iteration.
The problem is, when I try to use that many cores the geometry preprocessing takes a very long time (3 hours at least..).
Is it possible to run only the geometry preprocessing on a smaller number of cores (so it finishes more quickly) and then load the partitioned mesh to the solver later?
Thank you

bigfootedrockmidget · October 30, 2023, 12:14

That doesn't sound right. Can you tell a bit more about the case? Which part of the preprocessing takes so much time?

October 30, 2023, 09:01	Long geometry preprocessing time for a large amount of cpus	#1
Orangade New Member Join Date: Oct 2021 Posts: 7 Rep Power: 5	Hello, I am trying to run a simulation of 70M cells, and for that reason I need to use at least 128 cores (16 cores per cpu) on my server to get reasonable time per iteration. The problem is, when I try to use that many cores the geometry preprocessing takes a very long time (3 hours at least..). Is it possible to run only the geometry preprocessing on a smaller number of cores (so it finishes more quickly) and then load the partitioned mesh to the solver later? Thank you

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October 30, 2023, 12:14		#2
bigfootedrockmidget Senior Member bigfoot Join Date: Dec 2011 Location: Netherlands Posts: 676 Rep Power: 21	That doesn't sound right. Can you tell a bit more about the case? Which part of the preprocessing takes so much time?