# WRF作業
> [name=李侑庭]

[toc]

# Compile WRF
## Install gcc and gfortran ==(5%)==

sudo apt install gcc gfortran

- Check `which gcc`
- Check `gfortran`

## Install OpenMPI ==(10%)==

cd $APPROOT/build

wget https://download.open-mpi.org/release/open-mpi/v3.1/openmpi-3.1.6.tar.gz
tar xf openmpi-3.1.6.tar.gz
cd openmpi-3.1.6/
./configure --prefix=$APPROOT/opt/openmpi-3.1.6 --enable-orterun-prefix-by-default
mkdir $APPROOT/opt/openmpi-3.1.6

make -j
make install

export PATH=$APPROOT/opt/openmpi-3.1.6/bin:$PATH
export LD_LIBRARY_PATH=$APPROOT/opt/openmpi-3.1.6/lib

- [x] Not using `sudo` or root
- Check `which mpicc` and `which mpirun`
- Run the sample program

wget https://raw.githubusercontent.com/mpitutorial/mpitutorial/gh-pages/tutorials/mpi-hello-world/code/mpi_hello_world.c
mpicxx -o mpi mpi_hello_world.c
mpirun -H 10.21.21.1:4,10.21.21.2:4 ./mpi

**if '''have error ORTE does not know how to route a message ....'''
solution:ssh-copy-id


## Install HDF5 & NetCDF ==(15%)==
HDF5

cd $APPROOT/build
module load openmpi-3.1.6-t

wget https://docs.hdfgroup.org/archive/support/ftp/HDF5/prev-releases/hdf5-1.10/hdf5-1.10.5/src/hdf5-1.10.5.tar.gz
tar xf hdf5-1.10.5.tar.gz
cd hdf5-1.10.5/
CC=mpicc CXX=mpicxx F77=mpifort F90=mpif90 F9X=mpif90 FC=mpif90 ./configure --enable-parallel --enable-fortran --prefix=$APPROOT/opt/hdfd-1.10.5 --disable-shared --enable-static --enable-hl

make -j
make install

- Check `which ncdump`
- Report (What compile arguments did you use? Why?)
## Get WRF.exe ==(20%)==
- Check `tail -15 build_wrf.log`
# Run WRF:
## Just run on head node (No need to finish) ==(5%)==
- Check Screenshot
## Run on both nodes ==(15%)==
- Check `./validate.csh ./VALIDATION ./VALIDATE`
## Optimization(Multiple Node, AVX512...) ==(20% ⬆️)==
- Check `./timing.csh TIMING/rsl.out.0000`
- Report (What do you do?)
- Parallel scalability test for
- 1 node
- 2 nodes
- 4 nodes

# Others
## Display the WRF output ==(10%)==:
- Check Screenshot
## Profile WRF (Bonus) ==(15%)==:
- Check profiler screenshot
- Report (Based on the results, What are your assumptions?)

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