> > >>> Can PETSc use parallel HDF5? > > >> Yeah, the implementation is in VecView_MPI_HDF5_DA and uses > > >> H5FD_MPIO_COLLECTIVE if supported. Did you build your HDF5 with > > MPI? > > > > > > I just --download-hdf5. Do I need to do something else? > > > > That should configure it with whichever MPI PETSc is using. How are > > you concluding that it's only using rank 0? > I have to ask back to the person working on the parallel IO. Ok. The guy was judging from a code part, that was irrelevant and not from doing a profile. Solved! Thank you!
Henrik
