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Worked Example:

We explain the model installation and the process of running of a forecast experiment on the ECMWF Atos Sequana XH2000 HPC facility (hpc2020). 

• All model sources, data files and configuration scripts that are required for the worked example experiment described in this guide can be found on the ECMWF file system web site here: https:  /perm//sites.ecmwf.int/openifs/oifs_data/48r1/exampleopenifs-data/ (only registered OpenIFS users will be given access)
• For users without with access to the ECMWF HPC facility we provide URLs for downloading all required data files and configuration scripts.an internal filepath location for the data packages (without the model source code). 
• In our example the The model will be installed into $HOME/openifs-48r1.1/ as a default location.
• The example forecast experiment will be set up in directory $OIFS_EXPT/ab2a/

It is important to note that the installation process on hpc2020 will not directly translate to alternative systems. To address this we present details about a docker install in the last section of this guide.

cd $HOME
wget https://sites.ecmwf.int/openifs/openifs-data/src/48r1/# download the openifs-48r1.tar.gz model package and copy the tarball to your home directory:
cp openifs-48r1.tar.gz $HOME
tar -xvzf openifs-48r1.tar.gz