dm: 
DM Object: 2 MPI processes
  type: network
  NSubnets: 1; NEdges: 2; NVertices: 3; NSharedVertices: 0.
  [0] nEdges: 1; nVertices: 2; nSharedVertices: 0
     Subnet 0: nEdges 1, nVertices(include shared vertices) 2
       edge 0: 1 ----> 0
  [1] nEdges: 1; nVertices: 2; nSharedVertices: 0
     Subnet 0: nEdges 1, nVertices(include shared vertices) 2
       edge 1: 2 ----> 0
PetscSection Object: 2 MPI processes
  type not yet set
Process 0:
  (   0) dof  2 offset   0
  (   1) dof  2 offset   2
  (   2) dof  2 offset   4
Process 1:
  (   0) dof  2 offset   0
  (   1) dof  2 offset   2
  (   2) dof  2 offset   4

 dmclone: 
DM Object: 2 MPI processes
  type: network
  NSubnets: 1; NEdges: 2; NVertices: 3; NSharedVertices: 0.
  [0] nEdges: 1; nVertices: 2; nSharedVertices: 0
     Subnet 0: nEdges 1, nVertices(include shared vertices) 2
       edge 0: 1 ----> 0
  [1] nEdges: 1; nVertices: 2; nSharedVertices: 0
     Subnet 0: nEdges 1, nVertices(include shared vertices) 2
       edge 1: 2 ----> 0
PetscSection Object: 2 MPI processes
  type not yet set
Process 0:
  (   0) dof  2 offset   0
  (   1) dof  0 offset   2
  (   2) dof  0 offset   2
Process 1:
  (   0) dof  2 offset   0
  (   1) dof  0 offset   2
  (   2) dof  0 offset   2

 dm vec:
Vec Object: 2 MPI processes
  type: mpi
Process [0]
  Edge 0:
    1.
    1.
  Vertex 1:
    1.
    1.
Process [1]
  Edge 1:
    1.
    1.
  Vertex 0:
    1.
    1.
  Vertex 2:
    1.
    1.

 dmclone vec:
Vec Object: 2 MPI processes
  type: mpi
Process [0]
  Edge 0:
    2.
    2.
Process [1]
  Edge 1:
    2.
    2.