[petsc-dev] getting ready for PETSc release

[Matthew Knepley]

On Sun, Jun 8, 2014 at 3:02 PM, Blaise A Bourdin <bourdin at lsu.edu> wrote:

> Hi,
>
> I hate to be the party pooper, especially when I don’t have code to
> contribute, but I/O with DMComplex is still far from release ready. Is it
> reasonable that having functional I/O in a stable release is going to wait
> until 3.6?
>

I agree with Barry that since this will not mean any interface changes, it
can be done with patch releases.


>
> I still can’t figure out how to deal with cell sets of different types
> (say quads and tri).
>

I have not tried this. I had been focusing getting higher order (Q2) and
either quads or tris to work. This
all seems to be working correctly now. I have been using it to
visualize/restart a magma dynamics app
with 3 fields all with different discretizations.


> All cell and vertex sets seem to be contained in the hdf5 file, but not in
> a way that is usable by post processing tools (visit, paraview, ensight).
>

For restarting, mixed meshes should work fine. They are stored in

  /topology/cells
                   /cones
                   /order
                   /orientation

and the field values are in

  /fields/<name>

For visualization and most post-processing, there are separate arrays

  /viz/topology
        /geometry

which are exactly what I needed to make Paraview understand the xdmf. The
fields
sampled down to cells and vertices are in

  /vertex_fields/<name>
  /cell_fields/<name>


> The xdmf generation script bin/pythonscripts/petsc_gen_xdmf.py is quite
> fragile.
>

I have not had it fail for me, but would be happy to look at the failure
you are getting.

  Thanks,

     Matt


> I understand that it is probably too late to get this fixed and tested in
> 3.5. What is the best course of action?
>
> Blaise
>
> >
> >   We’ll be making a PETSc release in a few days so please get anything
> you need into next for testing and movement over to master.
> >
> >  Barry
> >
> > Tentative plan for release Wed June 11
> >
>
> --
> Department of Mathematics and Center for Computation & Technology
> Louisiana State University, Baton Rouge, LA 70803, USA
> Tel. +1 (225) 578 1612, Fax  +1 (225) 578 4276
> http://www.math.lsu.edu/~bourdin
>
>
>
>
>
>
>
>


-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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