[petsc-users] Scatter error

[Jed Brown]

Mohammad Mirzadeh <mirzadeh at gmail.com> writes:
> I assume I'm getting this since they somehow share a VecScatter
> internally because of VecDuplicate? If so how can I fix this?

Hmm, there is no VecScatterDuplicate so I think you'd have to make the
vectors independently.

> Also as a side question, if I stored fxx and fyy inside a block
> vector, would I gain any performance in terms of MPI traffic? What
> about in 3D?

It would be half the messages.  Why are these vectors separate in the
first place?
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