IS to select slice from 3D DMDA vector : 
IS Object: 3 MPI processes
  type: general
[0] Number of indices in set 0
[1] Number of indices in set 16
[1] 0 32
[1] 1 33
[1] 2 34
[1] 3 35
[1] 4 36
[1] 5 37
[1] 6 38
[1] 7 39
[1] 8 40
[1] 9 41
[1] 10 42
[1] 11 43
[1] 12 44
[1] 13 45
[1] 14 46
[1] 15 47
[2] Number of indices in set 0

 Extracted slice vector, in DMDA ordering : 
Vec Object: 3 MPI processes
  type: mpi
Process [0]
Process [1]
196.
198.
200.
202.
194.
197.
200.
203.
192.
196.
200.
204.
190.
195.
200.
205.
Process [2]

 Extracted slice vector, in natural ordering : 
Vec Object: 3 MPI processes
  type: mpi
Process [0]
Process [1]
196.
198.
200.
202.
194.
197.
200.
203.
192.
196.
200.
204.
190.
195.
200.
205.
Process [2]