[OMPI users] runtime MCA parameters

[marcin.krotkiewski]

I was wondering if it is possible, or considered to make it possible to 
change the various MCA parameters by individual ranks during runtime in 
addition to the command line?

I tried to google a bit, but did not get any indication that such topic 
has even been discussed. It would be a very useful thing, especially in 
multi-threaded applications when using MPI_THREAD_MULTIPLE, but I could 
come up with plenty uses in usual single-threaded ranks setups.

Marcin