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How to implement "PWM and PBM" under Windows MPI settings

MPI PWM and PBM Windows nlme

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#1 0521

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Posted 19 July 2023 - 01:20 PM

Hi Support,

 

I read "Phoenix_Framework_Guide" and that say, when Phoenix can run "Stepwise Cov Search" in Windows_MPI, it automatically assigns cores to each model to run based on the number of covariate relationships.

Phoenix supports both PBM and PWM and even supports a combination of the two. An example of combining PBM and PWM can be seen in a stepwise covariate search. During the first step, let’s assume there are 8 models to be run (base + 7 possible covariates). Phoenix will run all 8 models simultaneously (PBM) with each model using 20 computation cores (PWM).

 

 

But I can't see this when I use it.

 

For example:
 
My Environment information:
  • Phoenix NLME 8.4
  • CPU: 32 threads
 
Description of the scenario I used:
Stepwise 1st Find effect to add:
  • 1 Base Model + 11 covariate model =12 Model
Observed CPU state: Models are executed one by one, each model is executed by 32 cores
Expected  CPU state: 12 models run simultaneously, per model run under MPI by 2 core, total of 24 cores used
 
Stepwise 2ed Find effect to add:
  • 10 covariates model
Observed CPU state: Models are executed one by one, each model is executed by 32 cores
Expected  CPU state: 10 models run simultaneously, per model run under MPI by 3(or 2) core, total of 30(or 20) cores used

 

Phoenix-Edit-Preferces-RemoteExecution-ComputeGrid:

LocalHost|Windows|MPI|MPI_32||||32|

 

Did I set something wrong?

Could you help me?

 

Sincerely,
0521

Edited by 0521, 19 July 2023 - 01:22 PM.

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#2 bwendt@certara.com

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Posted 20 July 2023 - 10:12 AM

Hi 0521,

 

on Windows and for covariate searches we recommend using Multicore mode since it is more efficient.

Please see the the online-help for setting up parallelization on Windows computers and Linux grids:

 

https://onlinehelp.c...rhtocid=_41_4_0

 

Let us know if you have further questions.

 

Bernd



#3 0521

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Posted 20 July 2023 - 11:31 AM

Hi Bernd,

 

Thank you for your reply. As you suggested, I did eventually choose "Windows_Multicore" (PBM).

 

Do you mean that Windows_MPI does not support "PWM and PBM", only conjunction with job managers under Linux with MPI(eg. Linux_SLURM_MPI) supports "PWM and PBM"?

 

Deploying "SLURM_MPI (Linux)" is a bit difficult for me  :huh: , could you issue pre-deployed docker images ready to use?

(The management side, client side, and executive side are all in one docker. I don't plan to use a very large cluster built with multiple machines, I just expect to be able to implement "PBM and PWM" on my single machine.)

 

Thanks in advance!  :)

0521



#4 bwendt@certara.com

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Posted 21 July 2023 - 03:59 PM

Sorry, `PWM and PBM` mode is supported on grids only. 

For Slurm I would suggest you raise a support ticket at support@certara.com. We will see how we can help you setting up the  grid.

 

Bernd







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