So I reread the piggybacking document on wiki. I am not thrilled with
the amount of new APIs this would be adding to the standard but can also
see the point of the paper. I am curious how the new API is expected to
be used? The proposal say's this API is needed for user-level fault
tolerance solutions. So do we expect a user to change all application
calls to the MPI library to use the PB calls? I wonder if a more
general solution that doesn't require a direct change to the API would work.
I wonder if there might be a way one could register piggybacking with a
communicator and somehow have the actual piggybacking occur as a
callback from an implementations messaging layer?
Just a thought,
--td
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