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From: Glenn Johnson (gjohnson_at_[hidden])
Date: 2006-09-28 15:03:58


I have an 8-way AMD64 system. I built a 64 bit open-mpi-1.1
implementation and then compiled software to use it. That all works
fine.

In addition, I have a 32 bit binary program (Schrodinger Jaguar) that I
would like to run on this machine with mpi. Schrodinger provides source
code to build an mpi compatibility layer. This compatibility layer
allows jaguar to use a different mpi implementation than that which the
software was compiled with. I do not want to give up the 64 bit open-mpi
that I already have and am using.

So my questions are:
     1. Can I build/install a 32 bit version of open-mpi even though I
        already have a 64 bit version installed?
     2. What "tricks" might I need to do to make sure a program calls
        the correct version of mpi (32 or 64 bit)?
     3. Would I do better considering running jaguar in a 32 bit chroot
        environment?

Thanks.

-- 
Glenn Johnson <gjohnson_at_[hidden]>
USDA, ARS, SRRC