Reply To: Unable to run lsrun on HPC cluster

[Reno Genest]

Hello Rajesh,

The model needs to be large enough to use 147 cores. As a rule of thumb, we like to have 5-10k elements per core. So, for your model with 240 952 elements, this means running on 24-48 cores should be ideal. Running with more cores may degrade performance because the communication between the cores becomes the bottleneck.

Also, from your command line above, it looks like you are using Intel MPI 2021.9 and not 2021.13. Please try with 2021.13.

Could you post the Timing Information at the end of the d3hsp file? What part of the simulation takes most of the %CPU Clock time?

Also, is this a pure EM model or is it coupled with structural and thermal? If it is a pure EM solve, you can use rigid material models for the structural solver and set NCYFEM to a high value on *EM_CONTROL.

Do you have wires modeled? If so, have you tried modeling wires with beam elements instead of solid elements? This should speed up the calculation.

If you are a commercial customer, please create a support case on the Ansys Customer Support Space (ACSS) and we will be able to look at your model and help you better:

customer.ansys.com

 

Let me know how it goes.

 

Reno.