...

Domain & resolution

First you should decide if your upon the final(!) simulation (see "Cascading" below) should be on a regional or a global grid and at which domain and resolution you want to run. For this it is important to know that:

• the more grid points a grid has , => the more cores are needed and
• the smaller higher the resolution and with that => the shorter the model timestep => the longer the simulation will take.the runtime of the simulation

Have a look at the following wiki about how to set up a model grid: Set up a model grid

Number of points

Topology (MPI & OpenMP)

...