[mpich-discuss] Non-constant extent for derived data types

[mhgardner]

Hi,

I'm rather new to MPI, but I'm trying to define a derived MPI struct data
type. The data type is made up of int, float and vector types. The number
of entries in the vector elements are not constant throughout the analysis,
so is there a way to define an MPI data type that can deal with vectors of
changing size? Or is it better to create vectors of fixed extent and just
add enough padding so they don't overflow?

Thanks,

Mike
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