graphics/opendx and dropping science/hdf

[Tomasz Plewa]

Hi -

If there would be some effort in developing data interface between
HDF5 and OpenDX, FLASH folks might be interested in that. We have HDF5
for parallel I/O and having support for data exchange with OpenDX
would make that free graphics package available to our users.

Tomek
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Thu, 11:43 CDT (16:43 GMT), Apr-08-2004
_______________________________________________________________________________

   Tomasz Plewa                                      www:   flash.uchicago.edu
   Computational Physics and Validation Group        email: tomek at uchicago.edu
   The ASCI Flash Center, The University of Chicago  phone: 773.834.3227
   5640 South Ellis, RI 475, Chicago, IL 60637       fax:   773.834.3230
_______________________________________________________________________________

On Thu, Apr 08, 2004 at 10:35:14AM -0500, Mike Folk wrote:
> (Thanks for cc'ing me Quincey.)
> Just a couple other comments about open dx:
> 
> The CACTUS project has been using open dx with hdf5 for several years.  I 
> strongly suspect there are others, but don't know specifics.  As far as I 
> know, the CACTUS folks haven't documented their work (I asked them a few 
> times, but that was a couple of years ago), so I don't know exactly how 
> they organize the data.
> 
> Open dx and hdf5 are a natural combination, and it's a pity we haven't 
> married them in some formal way, and we'd love to work with you if you move 
> in that direction.
> 
> Mike
> 
> At 09:27 AM 4/8/2004, Quincey Koziol wrote:
> >Hi Mikhail,
> >
> > > I intend to drop the science/hdf port. It was obsoleted by hdf5 long ago
> > > (was it?), it breaks on some some 64bit platforms, it conflicts with
> > > math/netcdf.
> > >
> > > All the technical issues are, probably, fixable, but the obsoleteness
> > > makes them not worth the effort. Or so it seems.
> > >
> > > The only port relying on science/hdf is graphics/opendx and only if
> > > WITH_HDF is defined. Unfortunately, opendx does not (yet?) support hdf5.
> > >
> > > So...
> > >       . Does hdf5 really obsolete hdf4?
> >     No, they are different file formats & libraries, etc.
> >
> > >       . Does hdf support add much value to opendx at all,
> > >         or can we just remove it?
> >     I don't know.
> >
> > >       . If not, should I (or some other helping hand) try to patch
> > >         opendx to use hdf5?
> >     It would certainly be nice if opendx supported hdf5.
> >
> > >               or
> > >       . bring the old hdf4 into the 21st century (fixing the types,
> > >         depending on math/netcdf instead of building its own)?
> >     It shouldn't be _too_ hard to fix the type information in hdf4 (I can 
> > help
> >you with that, if you'd like), but it would be _very_ hard to depend on
> >math/netcdf instead of its own.
> >
> >     Quincey
> >
> > >
> > > Thanks for any ideas,
> > >
> > >       -mi
> > >
> 
> --
> Mike Folk, Scientific Data Tech (HDF)   http://hdf.ncsa.uiuc.edu
> NCSA/U of Illinois at Urbana-Champaign          217-244-0647 voice
> 605 E. Springfield Ave., Champaign IL 61820     217-244-1987 fax  

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