Le 16-03-14 15:07, Rob Latham a écrit :
On mpich's discussion list the point was made that libraries like HDF5
and (Parallel-)NetCDF provide not only the sort of platform
portability Eric desires, but also provide a self-describing file format.
==rob
But I do not agree with that.
If MPI can provide me a simple solution like user datarep, why in the
world would I bind my code to another library?
Instead of re-coding all my I/O in my code, I would prefer to contribute
to MPI I/O implementations out there... :)
So, the never answered question: How big is that task????
Also, in 2012, I can state that having looked at HDF5, there was no
functions that used collective MPI I/O for *randomly distributed*
data... Collective I/O was available only for "structured" data. So I
coded it all directly into MPI natives calls... and it works like a charm!
Thanks,
Eric
