[OMPI users] Newbie question continues, a step toward real app

[Tena Sakai]

Hi,

I have a script I call fib.r.  It looks like:

   #!/usr/bin/env r

   fib <- function( n ) {
                a <- 0
                b <- 1
                for ( i in 1:n ) {
                    t <- b
                    b <- a
                    a <- a + t
                }
                a
            }

   print( fib(argv[1]) )

When I run this script with a parameter, it generates a fibonocci number:

   $ fib.r 5
   5
   $ fib.r 6
   8

and if I stick this into <program> part of MIMD example I have used previously:

   $ mpirun -H vixen -np 1 hostname : --hostfile myhosts -np 8 fib.r 7

I get:

   vixen.egcrc.org
   [1] 13
   [1] 13
   [1] 13
   [1] 13
   [1] 13
   [1] 13
   [1] 13
   [1] 13

This is good as proof of concept, but what I really want to do is to have that 7
different for each (slave) process.  Ie., I want to run “rfib 5” on node 0, 
“rfib 6”
on node 1, “rfib 7” on node 2, and so on.  Is there any way to give a different
parameter(s) to different process/slot?

I thought maybe I can use –rf option to do this, but I am leaning toward –app
option.  Unfortunately, I see no example for the application context file.  
Would
someone kindly explain how I can do what I describe?

Thank you.

Tena Sakai
tsa...@gallo.ucsf.edu