I'm working with open mpi and I would do a little experiment, i will try to pass one process by another process.

For example, assuming that there are 2 processes that are communicating say rank 1 and 2. And there is a process of rank 3, I would like the rank 3 (it could be assumed that this node is marked down at the initial hostfile) took the place of rank 2, and rank 1 still think that he is communicating with rank 2 when in fact is communicating with the rank 3.

I guess I'll have to modify tables as orte_job_map_t and orte_proc_t, but I wanted to know if someone already has experience doing something similar, and can guide me at least.

The communication between processes, in principle, would be irrelevant, so i will not need to use checkpoints / restarts for now.

Greetings

Hugo Meyer