Updated: 22 December 2023
1. Load required modules and set environment variables
Paste the below lines into your terminal. (Putting these in ~/.bashrc is not recommended.)
module purge
module purge
module load ParallelIO/2.6.2-cpeIntel-23.09
module load METIS/5.1.0-cpeIntel-23.09
export PIO=${EBROOTPARALLELIO}
export NETCDF=${CRAY_NETCDF_HDF5PARALLEL_PREFIX}
export PNETCDF=${CRAY_PARALLEL_NETCDF_PREFIX}
export OPENMP=true
### Common mistake :: insert spaces before or after =
2. Download MPAS source code
An example for MPAS 8.0.1 is as shown below.
wget https://github.com/MPAS-Dev/MPAS-Model/archive/refs/tags/v8.0.1.tar.gz tar xzf v8.0.1.tar.gz mv MPAS-Model-8.0.1 MPAS cd MPAS
For other version, check https://github.com/MPAS-Dev/MPAS-Model/releases.
3. Compile MPAS
Compile each MPAS core you want.
make -j4 intel-nersc CORE=init_atmosphere PRECISION=single AUTOCLEAN=true make -j4 intel-nersc CORE=atmosphere PRECISION=single AUTOCLEAN=true ...
User still has to use make clean CORE=XXX before recompiling each core.
Additional notes:
CORE=ocean only supports double.
CORE=seaice only supports double and only serial build (-j1) works.
Users may have to add parentheses for the print function, i.e., print xxx → print(xxx), in
./src/core_ocean/BGC/makedep.py
./src/core_ocean/cvmix/makedep.py
to make these files compatible with Python3.
4. Example: Job submission script
#!/bin/bash
#SBATCH -p compute # Partition
#SBATCH -N 1 # Number of nodes
#SBATCH --ntasks-per-node=64 # Number of MPI processes per node
#SBATCH --cpus-per-task=2 # Number of OpenMP threads per MPI process
#SBATCH -t 5-00:00:00 # Job runtime limit
#SBATCH -J MPAS # Job name
#SBATCH -A ltxxxxxx # Account *** {USER EDIT} ***
module purge
module load ParallelIO/2.6.2-cpeIntel-23.09
module load METIS/5.1.0-cpeIntel-23.09
export OMP_STACKSIZE="32M"
export OMP_NUM_THREADS=${SLURM_CPUS_PER_TASK}
ulimit -s unlimited
srun -n${SLURM_NTASKS} -c${SLURM_CPUS_PER_TASK} ./init_atmosphere_model
srun -n${SLURM_NTASKS} -c${SLURM_CPUS_PER_TASK} ./atmosphere_model
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