Figure also shows that using two compute nodes can decrease the total wall time for a single simulation time step, albeit not perfectly with double the perfor-mance. To avoid having to save the ground and excited state coefficient files to a network shared storage system for every time step and for every TeraChem excited state job, each server maintains its own local copy of the coefficient files. This strategy further ensures that future users of PySCES, who may wish to distribute their TeraChem jobs over dissimilar hardware, are not faced with the possibility that the (binary) coefficient files are incompatible between the different computing environments. As a result, each TeraChem server generates its own ground and excited state coefficient files.