Hi PETSc Developers, I see that in the examples for ISCreateGeneral, the index sets are created by copying values from int arrays (which were created by PetscMalloc1 which is not collective).
If I the ISCreateGeneral is called with PETSC_COMM_WORLD and the int arrays on each rank are independently created, does the index set created concatenate all the int-arrays into one ? If not, what needs to be done to get such an index set ? PS: For context, I want to write a fftshift convenience function (like numpy, MATLAB) but for large distributed vectors. I thought that I could do this with VecScatter and two index sets, one shifted and one un-shifted. Thank You, Sajid Ali Applied Physics Northwestern University
