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JohannesBuchner / UltraNest

Fit and compare complex models reliably and rapidly. Advanced nested sampling.
https://johannesbuchner.github.io/UltraNest/
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n subfolders are created when running on n cores #144

Closed ThomasKonings closed 3 months ago

ThomasKonings commented 4 months ago

I am having trouble when running ultranest in parallell with mpirun -np n python myscript.py. I have put resume='subfolder' in the ReactiveNestedSampler function.

n subfolders are created, from run1 to runn, instead of just one single output subfolder. However, sometimes (for unknown reasons) it does create a single subfolder. I don't change anything regarding the set-up/environment/code that can justify that the code switches between creating n subfolders, or creating a single subfolder.

I also do not understand the meaning of the results in every of those n subfolders, as one final output is needed.

Thank you in advance!

p.s. I am noticing similarities with Issue #27 , which seems to request a functionality that creates exactly n subfolders instead of one.

JohannesBuchner commented 4 months ago

Have a look at https://johannesbuchner.github.io/UltraNest/debugging.html#Parallelisation-issues and make sure mpi4py is installed.