Learning Forum

[J0sh8830]

Hi, my name is Joshua Howell and I am a student at the University of Tennessee: Space Institute at Tullahoma Tennessee. I am running electrostatic simulations using Maxwell 3D in the Ansys Electronics Desktop.

My goal is to submit my larger simulations to the HPC Cluster at our university. I have been able to run smaller scale simulations on the cluster with some success. However, when I try to submit my larger simulations, several errors can occur:

1.) I receive an error while opening or writing the mesh files. This tends to happen when I try to utilize a solve for multiple cores per task.

2.) I receive an error stating that the simulation ran out of memory (likely due to error 1.) above because I have to lower the amount of CPUs used to avoid the mesh error).

3.) A fellow student with experience in running simulations using HPC and Linux helped me to generate a script that is working to run smaller simulations. However, it will not run larger scale simulations. We tried to utilize the solutions matrix HPC method but it did not allow us to create child processes.

I have a few questions:

1.) Is there a certain version of Linux or settings that need to be altered so that the simulations can run in parallel?

2.) Is there a universal "test" simulation and script for parallel processing that could be used to diagnose whether the error is related to Ansys or the cluster?

3.) Is there a universal script available that can be used for Ansys Electronics simulations that utilizes parallel processing using HPC on clusters?

Any help on this topic would be greatly appreciated. I have attached two SLURM script files (.slr) as.txt files since the .slr files could not be uploaded. I have also attached the error and output files for the memory error and the meshing error which are named accordingly. If you need any other information or files, let me know!

Thanks so much for your time.

Best regards,

Joshua Howell

err_memory.txt

[Matt Madore]

Hello Joshua Please refer to Ansys Help for assistance with running under SLURM with 2021R2, which is now natively supported.
https://ansyshelp.ansys.com/Views/Secured/Electronics/v212/en/Subsystems/Maxwell/Maxwell.htm#IntegrationwithSLURMLinuxScheduler.htm%3FTocPath%3DMaxwell%2520Help%7CRunning%2520Simulations%7CHigh%2520Performance%2520Computing%2520(HPC)%2520Integration%7C_____8
https://ansyshelp.ansys.com/Views/Secured/Electronics/v212/en/Subsystems/HFSS/HFSS.htm#HPC/IntegrationwithSLURMLinuxScheduler.htm%3FTocPath%3DHFSS%2520Help%7CHigh%2520Performance%2520Computing%7CHigh%2520Performance%2520Computing%2520(HPC)%2520Integration%7C_____9
https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/Electronics/v212/en/Subsystems/HFSS/HFSS.htm%23HPC/IntegratingANSYSEMToolswithThirdPartySchedulers.htm

[J0sh8830]

Hello Thanks for the reply. I have had some success in submitting a script via SLURM. However, I did want to say that I could not access the links you provided. It requested that I create an account, which I did. But I am not a license holder so I could not complete the registration because I do not have a customer number I believe is what it said. Is there any way you can share the links without having to go through the registration?

Best regards Joshua Howell

[Matt Madore]

Unfortunately there is no way to share these without a login. While you are in Electronics Desktop, try going to 'Help' and then browsing to the sections in the links.