Ralph Castain a écrit :
Did the version you are running get installed in /usr? Sounds like you are 
picking up a different version when running a command - i.e., that your PATH is 
finding a different installation than the one in /usr.

Right! I'm using OpenMPI with Rocks Cluster distribution. There is:
 openmpi-1.4-4.el5 rpm installed with
/usr/lib*/openmpi/1.4-gcc/etc/openmpi-mca-params.conf

but there is also  rocks-openmpi-1.4.3-1 with
/opt/openmpi/etc/openmpi-mca-params.conf

I never notice this double default install of OpenMPI in this linux 
distribution.
Thanks a lot for the suggestion, I was fixed on a syntax error in my config...

Patrick


On Oct 26, 2011, at 3:11 AM, Patrick Begou wrote:

I need to change system wide how OpenMPI launch the jobs on the nodes of my 
cluster.

Setting:
export OMPI_MCA_plm_rsh_agent=oarsh

works fine but I would like this config to be the default with OpenMPI. I've 
read several threads (discussions, FAQ) about this but none of the provided 
solutions seams to work.

I have two files:
/usr/lib/openmpi/1.4-gcc/etc/openmpi-mca-params.conf
/usr/lib64/openmpi/1.4-gcc/etc/openmpi-mca-params.conf

In these files I've set various flavor of the syntax (only one at a time, and 
the same in each file of course!):
test 1) plm_rsh_agent = oarsh
test 2) pls_rsh_agent = oarsh
test 3) orte_rsh_agent = oarsh

But each time when I run "ompi_info --param plm rsh" I get:
MCA plm: parameter "plm_rsh_agent" (current value: "ssh : rsh", data source: 
default value, synonyms:
                  pls_rsh_agent)
                  The command used to launch executables on remote nodes (typically either 
"ssh" or "rsh")

With the exported variable it works fine.
Any suggestion ?

The rpm package of my linux Rocks Cluster provides:
   Package: Open MPI root@build-x86-64 Distribution
   Open MPI: 1.4.3
   Open MPI SVN revision: r23834
   Open MPI release date: Oct 05, 2010

Thanks

Patrick



--
===============================================================
|  Equipe M.O.S.T.         | http://most.hmg.inpg.fr          |
|  Patrick BEGOU           |       ------------               |
|  LEGI                    | mailto:patrick.be...@hmg.inpg.fr |
|  BP 53 X                 | Tel 04 76 82 51 35               |
|  38041 GRENOBLE CEDEX    | Fax 04 76 82 52 71               |
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--
===============================================================
|  Equipe M.O.S.T.         | http://most.hmg.inpg.fr          |
|  Patrick BEGOU           |       ------------               |
|  LEGI                    | mailto:patrick.be...@hmg.inpg.fr |
|  BP 53 X                 | Tel 04 76 82 51 35               |
|  38041 GRENOBLE CEDEX    | Fax 04 76 82 52 71               |
===============================================================



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