At the moment the spawner module provides four different interfaces to start a new process, using a subprocess, mpiexec, srun or flux run. But different clusters might have different commands to trigger MPI parallel runs or in principle it would also be possible to add additional computing resources from a cloud provider to speed up an application running on your laptop. Either way it would be great to add the option to provide custom spawners.
At the moment the spawner module provides four different interfaces to start a new process, using a subprocess, mpiexec, srun or flux run. But different clusters might have different commands to trigger MPI parallel runs or in principle it would also be possible to add additional computing resources from a cloud provider to speed up an application running on your laptop. Either way it would be great to add the option to provide custom spawners.