The MIKE SHE solvers have been parallelized as much as possible and updated for 64-bit operating systems. Also, significant improvements in the memory and calculation efficiency was made. However, the scalability of the parallelization is dependent on the individual modules. Thus, every model will scale differently with respect to the running time.
The unsaturated module is highly scalable because each UZ column is completely independent. The saturated zone and overland flow modules, on-the-other-hand, are not nearly as scalable because of the connections between the cells. As an approximation, a typical model with a mix of modules will probably run between 1.8 and 2.5 times faster on a four-core computer.
The AUTOCAL program has also been updated to take advantage of multi-core computers. In this case, multiple simulations are sent automatically to each of the cores.
In all cases, the use of additional cores is restricted by the available licenses. The default number of run-time licenses is limited to eight, which means that the parallelization and AUTOCAL will support up to eight cores. If you want to use more than eight cores, then you must contact your local DHI office for additional run-time licenses.