[petsc-users] Vecscatter question

[Tabrez Ali]

Hello

If during Vecscatter (say from a global vector x to a local vector y) if 
'is' and 'iy' are such that almost all values being scattered happen to 
be on the local proc then almost 0 or very little MPI calls would be 
made internally. Is this correct?

Such a setup would not cause scalability problems except consuming some 
local proc memory due to 'y', 'is' and 'iy' being larger than required.

Thanks in advance.

Tabrez