[OMPI users] MPI I/O, ROMIO and showing io mca parameters at run-time

[Eric Chamberland via users]

Hi,

I want to try romio with OpenMPI 4.1.2 because I am observing a big 
performance difference with IntelMPI on GPFS.

I want to see, at *runtime*, all parameters (default values, names) used 
by MPI (at least for the "io" framework).

I would like to have all the same output as "ompi_info --all" gives me...

I have tried this:

mpiexec --mca io romio321  --mca mca_verbose 1  --mca 
mpi_show_mca_params 1 --mca io_base_verbose 1 ...

But I cannot see anything about io coming out...

With "ompi_info" I do...

Is it possible?

Thanks,

Eric


--
Eric Chamberland, ing., M. Ing
Professionnel de recherche
GIREF/Université Laval
(418) 656-2131 poste 41 22 42