*Two machines, each with 64 cores. The contents of the hosts file are:*
192.168.180.48 slots=1 192.168.60.203 slots=1 *Why do you get the following error when running with openmpi 5.0.0rc9?* (py3.9) [user@machine01 share]$ mpirun -n 2 --machinefile hosts hostname -------------------------------------------------------------------------- There are not enough slots available in the system to satisfy the 2 slots that were requested by the application: hostname Either request fewer procs for your application, or make more slots available for use. A "slot" is the PRRTE term for an allocatable unit where we can launch a process. The number of slots available are defined by the environment in which PRRTE processes are run: 1. Hostfile, via "slots=N" clauses (N defaults to number of processor cores if not provided) 2. The --host command line parameter, via a ":N" suffix on the hostname (N defaults to 1 if not provided) 3. Resource manager (e.g., SLURM, PBS/Torque, LSF, etc.) 4. If none of a hostfile, the --host command line parameter, or an RM is present, PRRTE defaults to the number of processor cores In all the above cases, if you want PRRTE to default to the number of hardware threads instead of the number of processor cores, use the --use-hwthread-cpus option. Alternatively, you can use the --map-by :OVERSUBSCRIBE option to ignore the number of available slots when deciding the number of processes to launch.
