title: Can I run duplicates of mpi program with mpirun or in one job submit
body: <p>I want to run an mpi program which typically took 2-4 processes repeatedly for dozen times. </p>
  
  <p>For a serial program, I can simply run mpirun -n 24 ./hello_world. I can get the program ran in parallel for 24 times. </p>
  
  <p>However, if it is an mpi program itself. Can I run a 24 mpi program in parallel, each mpi program will take 2 or 4 processes? How should I approach this?</p>
  
  <p>Regards</p>