We have a large fortran application designed to run doing IO with either mpi_io or fortran direct access. On a linux workstation (16 AMD cores) running openmpi 1.5.3 and Intel fortran 12.0 we are having trouble with random failures with the mpi_io option which do not occur with conventional fortran direct access. We are using ext3 file systems, and I have seen some references hinting of similar problems with the ext3/mpiio combination. The application with the mpi_io option runs flawlessly on Cray architectures with Lustre file systems, so we are also suspicious of the ext3/mpiio combination. Does anyone else have experience with this combination that could shed some light on the problem, and hopefully some suggested solutions?
T. Rosmond
