Building and testing WRF on Triolith

This page describes the compiling and testing of the WRF v371 model on NSC's triolith system (Triolith). Source code can be downloaded from the WRF page ([1]) after filling in a registration form.

The notes below refer to compiling and testing version 3.7.1 of the model.

1. Ensure the correct intel compiler, HDF5 and netcdf modules are loaded using:

module load buildenv-intel/2015-1

module load hdf5/1.8.14-i1403-impi-5.0.2.044

module load netcdf/4.3.2-i1403-impi-5.0.2.044-hdf5-1.8.14

2. Set appropriate HDF5 and netcdf environment variables:

export PHDF5=/software/apps/hdf5/1.8.14/i1403-impi-5.0.2.044

export NETCDF=/software/apps/netcdf/4.3.2/i1403-impi-5.0.2.044-hdf5-1.8.14

3. Configure the model. In the WRF base folder (WRF3):

./configure

If you are using/testing the 3D version of the model, choose option 16

If you are using/testing the 2D version of the model, choose option 13 (serial). For the 2D case, at this point the configure.wrf file also needs to be edited - lines 241-244 should appear as:

LIB_EXTERNAL    = \
                     -L$(WRF_SRC_ROOT_DIR)/external/io_netcdf -lwrfio_nf -L/software/apps/netcdf/4.3.2/i1403-impi-5.0.2.044-hdf5-1.8.14/lib -lnetcdff -lnetcdf   \
                     -L/software/apps/intel/composer_xe_2015.1.133/compiler/lib/intel64 -liomp5

4. Compile the model:

./compile -j 4 wrf

5. Compile test case (see README_test_cases), e.g. 3D quarter-circle sheer supercell

./compile em_quarter_ss

6. After a successful build, go to the specific test directory, e.g.:

cd test/em_quarter_ss

and run the initialization (ideal.exe) followed by the simulation (wrf.exe).

• 3D case

The model should be launched using NSC's mpprun MPI launch application. The model can be tested using an interactive session e.g.

interactive -N 1 -A <your-SNCI-project-code> -t 01:00:00

mpprun ideal.exe

mpprun wrf.exe

or by submitting a run script to the batch queue system on Triolith e.g. run script:

#!/bin/csh
#SBATCH -t 01:00:00
#SBATCH -A <your-SNCI-project-code>
#SBATCH -N 1
mpprun ideal.exe
mpprun wrf.exe

More information regarding running applications on Triolith.

• 2D case

For the 2D case, the serial code can be launched directly e.g. ./ideal.exe however note that you should still run jobs within an interactive session:

interactive -n 1 -A <your-SNCI-project-code> -t 01:00:00

./ideal.exe

./wrf.exe

or through Triolith's batch system.

Building WPS

1. Ensure the correct intel compiler, HDF5 and netcdf modules are loaded:

module load buildenv-intel/2015-1

module load hdf5/1.8.14-i1403-impi-5.0.2.044

module load netcdf/4.3.2-i1403-impi-5.0.2.044-hdf5-1.8.14

When compiling WPS, assumes you have already compiled WRF and the location/name of the WRF folder is ../WRFV3 relative to the main WPS folder.

2. Set appropriate HDF5 and netcdf environment variables:

export PHDF5=/software/apps/hdf5/1.8.14/i1403-impi-5.0.2.044

export NETCDF=/software/apps/netcdf/4.3.2/i1403-impi-5.0.2.044-hdf5-1.8.14

3. Configure WPS:

./configure

Either option 17 or 20 should work.

At this point the configure.wps file needs to be edited - line 48 should appear as:

WRF_LIB         =      -L$(WRF_DIR)/external/io_grib1 -lio_grib1 \
                       -L$(WRF_DIR)/external/io_grib_share -lio_grib_share \
                       -L$(WRF_DIR)/external/io_int -lwrfio_int \
                       -L$(WRF_DIR)/external/io_netcdf -lwrfio_nf \
                       -L$(NETCDF)/lib -lnetcdff -lnetcdf \
                       -L/software/apps/intel/composer_xe_2015.1.133/compiler/lib/intel64 -liomp5

4. Finally, compile WPS:

./compile