10. Launching MPI applications
Open MPI can launch MPI processes in a wide variety of environments, but they can generally be broken down into two categories:
Scheduled environments: these are systems where a resource manager and/or scheduler are used to control access to the compute nodes. Popular resource managers include Slurm, PBS/Pro/Torque, and LSF.
Non-scheduled environments: these are systems where resource managers are not used. Launches are typically local (e.g., on a single laptop or workstation) or via
ssh(e.g., across a small number of nodes).