View source for Installing Titan mesoscale model on spirit

== Install FCM ==

On your home, do:

<syntaxhighlight lang="Bash">
mkdir TOOLS
cd TOOLS
svn checkout https://forge.ipsl.jussieu.fr/fcm/svn/PATCHED/FCM_V1.2
cd
vi .bash_profile
</syntaxhighlight>

In your ~/.bash_profile, add:
<syntaxhighlight lang="Bash">
export PATH=$PATH:$HOME/TOOLS/FCM_V1.2/bin
</syntaxhighlight>

== Configure your ~/.bashrc ==
In your ~/bashrc, add:

<syntaxhighlight lang="Bash">
# Source global definitions
if [ -f /etc/bashrc ]; then
        . /etc/bashrc
fi

# User specific aliases and functions

ulimit -s unlimited

declare -x PATH=./:$PATH
declare -x WRFIO_NCD_LARGE_FILE_SUPPORT=1

module purge
module load intel/2021.4.0
module load intel-mkl/2020.4.304
module load openmpi/4.0.7
module load hdf5/1.10.7-mpi
module load netcdf-fortran/4.5.3-mpi
module load netcdf-c/4.7.4-mpi
declare -x WHERE_MPI=/net/nfs/tools/u20/22.3/PrgEnv/intel/linux-ubuntu20.04-zen2/openmpi/4.0.7-intel-2021.4.0-43fdcnab3ydwu7ycrplnzlp6xieusuz7/bin/
declare -x NETCDF=/scratchu/spiga/les_mars_project_spirit/netcdf_hacks/SPIRIT
declare -x NCDFLIB=$NETCDF/lib
declare -x NCDFINC=$NETCDF/include
</syntaxhighlight>

== Add private key ==
If you don't have one already, you need to add a private key file on your home, that corresponds to the public key file you have on GitLab.

To do this, put your id_rsa file in the directory ~/.ssh/.
Then, change the rights to the file, so that only you can access and read it:


<syntaxhighlight lang="Bash">
chmod go-r ~./ssh/id_rsa
</syntaxhighlight>

== Install the code ==

=== Load les_planet_workflow from Git ===
On one of the scratch disks (e.g. scratchu), do:

<syntaxhighlight lang="Bash">
git clone git@gitlab.in2p3.fr:aymeric.spiga/les_mars_project.git les_planet_workflow
</syntaxhighlight>

=== Create a new branch and adapt it to Titan ===
In the les_planet_workflow directory, do:

<syntaxhighlight lang="Bash">
git branch new_branch
git checkout new_branch
</syntaxhighlight>

Adapt 0_defining file to Titan.

Run install.sh:
<syntaxhighlight lang="Bash">
./install.sh
</syntaxhighlight>

== Run a simulation ==

Go to a test directory, for instance:
<syntaxhighlight lang="Bash">
cd titan_pbl
</syntaxhighlight>

Adapt the simulation parameters in namelist.input (e.g. the duration of the simulation).

Update the GCM data path: in callphys.def, set datadir to the same path as the datadir defined in physiq.def (e.g. /data/mlefevre/SIMU/filephys/TITAN/datagcm).

Then initialize and launch the simulation:
<syntaxhighlight lang="Bash">
./ideal.exe
./wrf.exe
</syntaxhighlight>