[petsc-users] Parallel output in PETSc with pHDF5 and VTK

[Jed Brown]

"Buesing, Henrik" <hbuesing at eonerc.rwth-aachen.de> 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.