[Carpet] Too many HDF5 files?

[Erik Schnetter]

Thomas,

I find that my output directories contain many HDF5 files.  There are  
many more HDF5 than ASCII files because each processor writes its own  
HDF5 file.  I assume that the performance win of this approach is  
worth it, although I haven't tested it.  Should we implement another  
method to reduce the number of files?  We could e.g. write one output  
file per group, per thorn, or even per iteration.  Do you have  
another suggestion?

If we combine different variables into the same file, is there  
anything special that needs to be added?  I think it should be  
possible to just write several variables into the same file, adding  
the meta-information (grid structure etc.) only once.  Is that correct?

-erik

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Erik Schnetter <schnetter at cct.lsu.edu>

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