"Buesing, Henrik" <[email protected]> writes: >> >>> 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. But if built and > linked correctly, it should work in parallel with PETSCViewerHDF5Open and > VecView?
Yes.
