You can use PMI_RANK. I just tried it and it works as expected. Which version of MPICH are you using? -- Pavan On 02/25/2013 10:06 AM US Central Time, Kirill Lykov wrote:

Dear mpich users,

I'm looking for an environmental variable which can be used in a bash script to identify the process rank. I launch a bash script using mpi: mpirun ./my-script.sh

In my-script I want to use the rank of the process to identify which input file to use. In OpenMPI, I used OMPI_COMM_WORLD_RANK and my-script.sh looked like the following:

inputName="MyInput_$OMPI_COMM_WORLD_RANK"./myexe $inputName

What can be used in MPICH instead of OMPI_COMM_WORLD_RANK? I found somewhere that $PMI_RANK is the same but I found that it is empty.

Kirill Lykov, Mr.

Doctoral Assistant Institute of Computational Science Faculty of Informatics Universit� della Svizzera italiana, USI Via G. Buffi 13 CH - 6904 Lugano (e) [email protected] (t) +41 (0) 788413392

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