Dear PETSc Developers,
I got the following information from VecScatterCreate() manpage.
"
PetscErrorCode VecScatterCreate(Vec xin,IS ix,Vec yin,IS iy,VecScatter *newctx)
Collective on Vec
Input Parameters
xin - a vector that defines the shape (parallel data layout of the
vector) of vectors from which we scatter
yin - a vector that defines the shape (parallel data layout of the
vector) of vectors to which we scatter
ix - the indices of xin to scatter (if PETSC_NULL scatters all
values)
iy - the indices of yin to hold results (if PETSC_NULL fills entire
vector yin)
"
My question is about "ix". If xin and yin are parallel Vec, how about ix?
Is "ix" an IS only containing local index set or a parallel IS
containing all the index set on all the processors (each local index
set on its processor)? Thanks a lot.
Regards,
Yujie
