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From: Rainer Keller (Keller_at_[hidden])
Date: 2006-02-07 10:21:04


Hello dear Andreas,
On Tuesday 07 February 2006 13:51, Andreas Fladischer wrote:
> i have a question to the parallel mpirun!i have a small cluster (for
> testing purpose one headnode and one node) which running fedora core 3!
> i installed openmpi on both nodes and created a user with the same uid
> on both nodes; now i try to build the glibc tools from the headnode but
> there couldn't be a connection to the second node;
>
> time mpirun -np 2 --hostfile /mnt/wolf/lamhosts make
You don't really want to run a parallel make on a distributed set of computers
using MPI.

There is a Distributed Make for fast parallel building of large projects, but
they analyse the Makefile and distribute directories to be compiled
concurrently.
Your standard "make" doesn't do that, so You'd run in all kinds of troubles
(e.g. each make writes the same output object files on Your NFS-shared
directory to name the least).

If, however, Your MPI-parallel Program (featuring at least an MPI_Init and
MPI_Finalize) is not running, then we have a case...
(hint: You must be able to at least log in to Your node (ssh or rsh), without
having to enter the password).

With best regards,
Rainer

-- 
---------------------------------------------------------------------
Dipl.-Inf. Rainer Keller       email: keller_at_[hidden]
  High Performance Computing     Tel: ++49 (0)711-685 5858
    Center Stuttgart (HLRS)        Fax: ++49 (0)711-685 5832
  POSTAL:Nobelstrasse 19             http://www.hlrs.de/people/keller
  ACTUAL:Allmandring 30, R. O.030      AIM:rusraink
  70550 Stuttgart