I am new to MPI and trying to get mpi4py to work on SHARC.
I have a conda environment with python version 3.6.
I have only loaded the conda module, nothing else.
I have started an interactive session using the qrsh -pe mpi 2 command
Following the guide on http://docs.hpc.shef.ac.uk/en/latest/sharc/software/apps/python.html I added the repo to the conda config and installed openmpi and mpi4py to my current environment. This seemed to work fine with python 3.6 even though the guide does not specifically mention 3.6.
I tried testing the configuration using the following code:

from mpi4py import MPI
comm = MPI.COMM_WORLD  
name=MPI.Get_processor_name()  
print("hello world")  
print(("name:",name,"my rank is",comm.rank))

And running it using mpirun -n 2 python mpi_test.py
The output I get is:

hello world
name: sharc-node013.shef.ac.uk my rank is 0, my size is 1
hello world
name: sharc-node013.shef.ac.uk my rank is 0, my size is 1

Which, as far as I can tell, is not what I should be seing.

Will get best performance on ShARC if build OpenMPI with PSM2 support (./configure --with-psm2). May therefore need different version of openmpi conda package per cluster.