[Paraview] Xdmf wrappers for our HDF5

[Jean Favre]

Eric E. Monson wrote:
>  We use the Xdmf wrappers for our HDF5 for now.
I am still encounteering major difficulties with Xdmf (cvs version of 
yesterday). Speed and Memory. When reading in parallel for example, the 
Xdmf reader attemps to allocate memory for the WHOLE grid on every node 
(independent of the number of pvserver nodes) causing memory crashes. 
There must be a problem reading the Extents. Using straight HDF5, I pass 
the Extents as hyperslabs and it works fine. I can read 2048^3 in 
parallel. For smaller grids, if memory is not a problem, the Xdmf 
wrapper works too, still considerably slower.

Jean -- Swiss National Supercomputing Centre