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1. Node configurations 

To achieve a MHz rate, we need to consider the following:

• The heavy-lifting SMD0 core

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• (MPI rank 0) needs to be assigned on an individual node exclusively. This will allow the entire node to read smalldata in parallel at the full bandwidth.
• The Srv cores (data writing) should not exceed some limit (currently, we see 8 as the upper limit for data writing cores).

To assign node configurations To assign a specific node to SMD0, run 

#!/bin/bash

#SBATCH --partition=anagpu
#SBATCH --nodes=2
#SBATCH --ntasks-per-node=3
#SBATCH --output=%j.log


# setup node configurations
./setup_nodes.sh


# "-u" flushes print statements which can otherwise be hidden if mpi hangs
# "-m mpi4py.run" allows mpi to exit if one rank has an exception
mpirun python -u -m mpi4py.run /reg/g/psdm/tutorials/examplePython/mpiDataSource.py

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