[vtkusers] parallel mesh reading and writing

[John Shalf]

I think CEI has taken over maintenance/development of the parallel  
HDF5 mesh readers and writers.  There have been parallel HDF5 mesh  
reader/writers in CEI since approx Ensight 7.6.

-john

On Jan 25, 2007, at 7:12 AM, Karl Merkley wrote:
> On Jan 25, 2007, at 3:38 AM, Jean Favre wrote:
>
>> On 25, Jan 2007 11:27 AM, John Biddiscombe <biddisco at cscs.ch> wrote:
>>
>>
>>> If the geometry is fixed for subsequent time steps, then the scalars
>>> can
>>> be written out as groups in time order. If the geometry is changing,
>>> new
>>> groups would need to hold geom and scalars per time step. some
>>> convention would need to be agreed on on how to lay it out.
>>
>> Someone has already gone through this effort. Check out the following
>> link which might be helpful
>>
>> http://hdf.ncsa.uiuc.edu/HDF5/papers/prototypes/mesh/
>>
>
> I have followed through on that link previously.  They document one  
> possible arrangement but it appears that the effort has not been  
> pursued since the prototype proposal in 2002.  The mailing-list is  
> dead and one of the principals indicated in a private email that he  
> had done nothing more.  If someone knows more than this I would  
> still be interested.
>
> I have also investigated a couple of other possibilities.
>
> XMDF (not to be confused with XDMF!) is an open source project with  
> maintenance funded by the US Army Corp of Engineers.  It is  
> primarily used for ground water modeling although it appears to be  
> useful as general mesh storage format. I'm not yet sure how  
> complete the data model is for an arbitrary FE model (boundary  
> conditions, material properties, etc.)
>
> Another option may be CGNS (CFD General Notation System).   This is  
> promoted by NASA and according to their website they are now a  
> "AIAA recommended practice."   It appears they are in transition to  
> an HDF5 based model but they are still supporting an alternate  
> system during the full transition.  Once I stumbled across CGNS I  
> actually found a thread on this list talking about it.  I will  
> follow through up on that old thread.
>
>     Karl
>
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