mpirun -np 4 ./app -ksp_type preonly -pc_type mpi -mpi_linear_solver_server -mpi_pc_type lu -mpi_pc_factor_mat_solver_type mumps -mpi_mat_mumps_icntl_7 5 -mpi_ksp_view

so the output is as below

KSP Object: (mpi_) 1 MPI process
  type: gmres
    restart=30, using Classical (unmodified) Gram-Schmidt Orthogonalization with no iterative refinement
    happy breakdown tolerance 1e-30
  maximum iterations=10000, initial guess is zero
  tolerances:  relative=1e-05, absolute=1e-50, divergence=10000.
  left preconditioning
  using PRECONDITIONED norm type for convergence test
PC Object: (mpi_) 1 MPI process
  type: lu
    out-of-place factorization
    tolerance for zero pivot 2.22045e-14
    matrix ordering: external
    factor fill ratio given 0., needed 0.
      Factored matrix follows:
        Mat Object: (mpi_) 1 MPI process
          type: mumps
          rows=192, cols=192
          package used to perform factorization: mumps
          total: nonzeros=17334, allocated nonzeros=17334
            MUMPS run parameters:
              Use -mpi_ksp_view ::ascii_info_detail to display information for all processes
              RINFOG(1) (global estimated flops for the elimination after analysis): 949441.
              RINFOG(2) (global estimated flops for the assembly after factorization): 18774.
              RINFOG(3) (global estimated flops for the elimination after factorization): 949441.
              (RINFOG(12) RINFOG(13))*2^INFOG(34) (determinant): (0.,0.)*(2^0)
              INFOG(3) (estimated real workspace for factors on all processors after analysis): 17334
              INFOG(4) (estimated integer workspace for factors on all processors after analysis): 1724
              INFOG(5) (estimated maximum front size in the complete tree): 96
              INFOG(6) (number of nodes in the complete tree): 16
              INFOG(7) (ordering option effectively used after analysis): 5
              INFOG(8) (structural symmetry in percent of the permuted matrix after analysis): 100
              INFOG(9) (total real/complex workspace to store the matrix factors after factorization): 17334
              INFOG(10) (total integer space store the matrix factors after factorization): 1724
              INFOG(11) (order of largest frontal matrix after factorization): 96
              INFOG(12) (number of off-diagonal pivots): 0
              INFOG(13) (number of delayed pivots after factorization): 0
              INFOG(14) (number of memory compress after factorization): 0
              INFOG(15) (number of steps of iterative refinement after solution): 0
              INFOG(16) (estimated size (in MB) of all MUMPS internal data for factorization after analysis: value on the most memory consuming processor): 1
              INFOG(17) (estimated size of all MUMPS internal data for factorization after analysis: sum over all processors): 1
              INFOG(18) (size of all MUMPS internal data allocated during factorization: value on the most memory consuming processor): 1
              INFOG(19) (size of all MUMPS internal data allocated during factorization: sum over all processors): 1
              INFOG(20) (estimated number of entries in the factors): 17334
              INFOG(21) (size in MB of memory effectively used during factorization - value on the most memory consuming processor): 1
              INFOG(22) (size in MB of memory effectively used during factorization - sum over all processors): 1
              INFOG(23) (after analysis: value of ICNTL(6) effectively used): 0
              INFOG(24) (after analysis: value of ICNTL(12) effectively used): 1
              INFOG(25) (after factorization: number of pivots modified by static pivoting): 0
              INFOG(28) (after factorization: number of null pivots encountered): 0
              INFOG(29) (after factorization: effective number of entries in the factors (sum over all processors)): 17334
              INFOG(30, 31) (after solution: size in Mbytes of memory used during solution phase): 0, 0
              INFOG(32) (after analysis: type of analysis done): 1
              INFOG(33) (value used for ICNTL(8)): 7
              INFOG(34) (exponent of the determinant if determinant is requested): 0
              INFOG(35) (after factorization: number of entries taking into account BLR factor compression - sum over all processors): 17334
              INFOG(36) (after analysis: estimated size of all MUMPS internal data for running BLR in-core - value on the most memory consuming processor): 0
              INFOG(37) (after analysis: estimated size of all MUMPS internal data for running BLR in-core - sum over all processors): 0
              INFOG(38) (after analysis: estimated size of all MUMPS internal data for running BLR out-of-core - value on the most memory consuming processor): 0
              INFOG(39) (after analysis: estimated size of all MUMPS internal data for running BLR out-of-core - sum over all processors): 0
  linear system matrix = precond matrix:
  Mat Object: 1 MPI process
    type: seqaij
    rows=192, cols=192
    total: nonzeros=9000, allocated nonzeros=36864
    total number of mallocs used during MatSetValues calls=0
      using I-node routines: found 64 nodes, limit used is 5

Is it correct that I successfully computed with mumps by using metis(icntl_7 5)?