search

CDAT / cdms

8 stars 10 forks source link

Make mpi4py initialization optional #425

Closed jasonb5 closed 3 years ago

jasonb5 commented 3 years ago

Currently CDMS2 has two states; with and without mpi4py (dependent on whether mpi4py package is available).

Here we'll propose a change to add an environment variable that will prevent mpi4py initializing when the mpi4py package is available.

Proposed environment variable: CDMS_NO_MPI

jypeter commented 3 years ago

Sounds reasonable. This has reminded me of 2 months of discussion with Charles exactly 8 years ago, in the not good old times when you had to compile CDAT. The whole thing started with my sending this mail

Argh, f__k!

I thought I was almost there because I got
[ 71%] Completed 'CDAT'
[ 72%] Built target CDAT

but I can't import cdms2 because mpi4py is missing [...]

Is the usage of mpi4py by cdms explained in a tutorial somewhere, or is it just something that takes place under the hood, without the user needing to know about it?