[petsc-dev] PetscSF vs. VecScatter

[Blaise A Bourdin]

Hi,

I am looking at adding full support for exodus to DMPlex (input and output).
Until I can understand better the nemesis format (a parallel extension of exodusII), my goal is to be able to scatter data back to cpu 0, re-use the pre-distribution ordering and use the sequential exo library.

I can figure out how to do that using VecScatter but I am intrigued by PetscSF.
Is there any documentation available, beside src/vec/is/sf/examples/tutorials/ex1.c?
In particular a short description of the basic concepts would be helpful.

Blaise 


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Department of Mathematics and Center for Computation & Technology
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