Post-processing on HPC with CFX-Post

hand90 · October 6, 2020, 05:42

Hi everyone,

I have a large quantity of results files which I need to post process in the same way (extract data, no visuals rendering). For this I have written a session file which iterates through the different timesteps extracting some data and writing it to a file.

Since I have many results files and that process takes quite a while I want to do this on the HPC running slurm. I do manage to run the session file on the login node (which I really should not ) but I cannot create a job, submit the job and successfully run the script.Does anyone have experience with this?

I am using PuTTy and Xming. Though I use Xming for X11 forwarding, this does not work when submitting it as a job. I am getting the following error message:
"viewer_ogl.exe: cannot connect to X server localhost:10.0"

Many thanks for your help.

evcelica · October 6, 2020, 11:58

I'm not answering your question. But I believe the drive type is the most important factor for this. An SSD or better yet, an NVME SSD would be much faster than a spinning disk hard drive, so use one of those as your working directory to speed this up.

hand90 · October 7, 2020, 05:53

Thank you Erik for your response.
I am currently using an SSD. However, it is not necessary the speed which makes me move to the HPC, but the amount of simulation I have to extract data from. Being able to do this on the HPC frees up my workstation for other work.

October 6, 2020, 05:42	Post-processing on HPC with CFX-Post	#1
hand90 Member Thomas Join Date: Nov 2017 Posts: 37 Rep Power: 8	Hi everyone, I have a large quantity of results files which I need to post process in the same way (extract data, no visuals rendering). For this I have written a session file which iterates through the different timesteps extracting some data and writing it to a file. Since I have many results files and that process takes quite a while I want to do this on the HPC running slurm. I do manage to run the session file on the login node (which I really should not ) but I cannot create a job, submit the job and successfully run the script.Does anyone have experience with this? I am using PuTTy and Xming. Though I use Xming for X11 forwarding, this does not work when submitting it as a job. I am getting the following error message: "viewer_ogl.exe: cannot connect to X server localhost:10.0" Many thanks for your help.

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October 6, 2020, 11:58		#2
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,167 Rep Power: 23	I'm not answering your question. But I believe the drive type is the most important factor for this. An SSD or better yet, an NVME SSD would be much faster than a spinning disk hard drive, so use one of those as your working directory to speed this up.

October 7, 2020, 05:53		#3
hand90 Member Thomas Join Date: Nov 2017 Posts: 37 Rep Power: 8	Thank you Erik for your response. I am currently using an SSD. However, it is not necessary the speed which makes me move to the HPC, but the amount of simulation I have to extract data from. Being able to do this on the HPC frees up my workstation for other work.