code_saturne User's Forum

Hello everyone,

I am looking for a tutorial to launch a parallel computing, on code_saturne, is there anyone who can guide me or give me some tips to do it,

Thank you

Houda

Hello,

There is no specific tutorial. Just choose the number of processors/cores in the GUI when running the code. Use a choice adapted to the number of hardware cores available. Depending on the processor bandwidth, you will get a performance increase up to all cores (on high-end processors) or up to about half of the cores. On a cluster, there is (almost)no hard limit, but choosing a number of cores so that you have about 20000 to 80000 cells per core leads to best performance (more cores than that is usually not very useful, less will be slower but scale fine.

Regards,

Yvan

Thanks again Yvan, another question about the mesh list that we choose at the beginning, is there a way to launch simulation on more than one geometry (lancement en lot).

Thanks

Hello,

Not directly, but this is possible using the "studymanager" tool. The only current limitation is that to use this on a cluster (in batch mode), you need to use a same batch submission for all cases, so thei si not a god fit for mesh refinement sensitivity studeis for example (mixing smaler and larger cases) but it is otherwise useful (in our V&V process, studymanager is used for comparison between different meshes).

Best regards,

Yvan

Hello,

I have a version 5 of code Saturne and following some presentation about it, I should find the possibility to put several directories at the opening of the software, but it is not my case, is it a plug-in to install (study manager launcher).

thanks

Best regards