Eric, Error codes are **not** mandated to be consistent across ranks in the MPI standard. Although file errors are not expected to cause the program to abort, there is no special case for I/O in that regard in the MPI standard. The Open MPI implementation acts accordingly and will not automatically ‘reduce’ error codes.
> On Jun 30, 2021, at 23:53, Eric Chamberland via users > <users@lists.open-mpi.org> wrote: > > Hi, > > I have a simple question about error codes returned by MPI_File_*_all* and > MPI_File_open/close functions: > > If an error is returned will it be the same for *all* processes? In other > worlds, are error codes communicated under the hood so we, end users, can > avoid to add "reduce" on those error codes? > > Thanks, > > Eric > > -- > Eric Chamberland, ing., M. Ing > Professionnel de recherche > GIREF/Université Laval > (418) 656-2131 poste 41 22 42 > Best Regards, Aurelien -- Aurelien Bouteiller, Ph.D. Innovative Computing Laboratory; The University of Tennessee; 1122 Volunteer Blvd.; Claxton suite 203; 37996, Knoxville, TN, USA +1 865 974 9308 (p); +1 865 974 8296 (f); Claxton 316 (f2f)
