mpisppy: using model from PySP and using hubs and spokes on top

[abodh]

Hello,

Is there an example in mpisppy where we can import a concrete model from PySP with networkx scenario creator and invoke hubs and spoke cylinders to run the PySP imported model in parallel? I want to use Progressive Hedging to do this.

I just started reviewing mpisppy and would appreciate any help on this :) Furthermore, are there good examples of running two-stage problems in parallel using mpisppy without learning too many HPC terminologies?

Regards,
Abodh

[DLWoodruff]

Hi Abodh, When you say "networkx scenario creator" I think you mean networkx scenario tree creator. For two-stage problems in mpi-sppy, tree creation is extremely easy. The scenario creator just has a function call to sputils.attach_root_node like the one in the farmer.py example: varlist = [model.DevotedAcreage] sputils.attach_root_node(model, model.FirstStageCost, varlist) The farmer example is a pretty good example. You don't have to learn too much HPC terminology, but you do have to install MPI and mpi4py as described in the github readme and the documentation: https://mpi-sppy.readthedocs.io/en/latest/

…

On Wed, Nov 16, 2022 at 4:01 PM Abodh Poudyal ***@***.***> wrote: Hello, Is there an example in mpisppy where we can import a concrete model from PySP with networkx scenario creator and invoke hubs and spoke cylinders to run the PySP imported model in parallel? I want to use Progressive Hedging to do this. I just started reviewing mpisppy and would appreciate any help on this :) Furthermore, are there good examples of running two-stage problems in parallel using mpisppy without learning too many HPC terminologies? Regards, Abodh — Reply to this email directly, view it on GitHub <#284>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AD4VTBD3X5NRCKVMWFKAYO3WIVYWFANCNFSM6AAAAAASCZK73U> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[abodh]

I count your response as a boost to my learning experiences. I will check the farmer example as you suggested and come back here if I have more questions. Thank you, Dr. Woodruff.