[OMPI users] How to use a wrapper for ssh?

[Paul Kapinos]

Hi OpenMPI folks,






Q1: Would this work?

2. use MCA parameters described in
http://www.open-mpi.org/faq/?category=rsh#rsh-not-ssh
to bend the call to my wrapper, e.g.
export OMPI_MCA_plm_rsh_agent=WrapPer
export OMPI_MCA_orte_rsh_agent=WrapPer


Why I believe so?





Best wishes,
Paul

P.S. reproducing: just set the envvars and do 'strace -f mpiexec ...'

example:

export OMPI_MCA_plm_rsh_agent=WrapPer
---> look'n for 'WrapPer';


export OMPI_MCA_orte_rsh_agent=WrapPer
(do not forget to unset OMPI_MCA_plm_rsh_agent :o)
---> still looking for 'ssh'


===> OMPI_MCA_orte_rsh_agent does not work?!

--
Dipl.-Inform. Paul Kapinos   -   High Performance Computing,
RWTH Aachen University, Center for Computing and Communication
Seffenter Weg 23,  D 52074  Aachen (Germany)
Tel: +49 241/80-24915

Using the version 1.4.3 of OpenMPI, I wanna to wrap the 'ssh' calls, which are made from the OpenMPIs 'mpiexec'. For this purpose, at least two ways seem to be possible for me: 1. let the wrapper have the name 'ssh' and paste the path where it is into the PATH envvar *before* the path to real ssh the oddly thing is, that the OMPI_MCA_orte_rsh_agent envvar seem not to have any effect, whereas OMPI_MCA_plm_rsh_agent works. Because "strace -f mpiexec ..." says still trying for opening 'ssh' if OMPI_MCA_orte_rsh_agent is set, and correctly trying to open the 'WrapPer' iff OMPI_MCA_plm_rsh_agent is set. Q2: Is the supposed non-functionality of OMPI_MCA_orte_rsh_agent a bug, or do I have just misunderstood something? stat64("/opt/lsf/8.0/linux2.6-glibc2.3-x86_64/bin/WrapPer", 0xffff8324) = -1 ENOENT (No such file or directory) stat64("/opt/lsf/8.0/linux2.6-glibc2.3-x86_64/bin/ssh", 0xffff8324) = -1 ENOENT (No such file or directory)

smime.p7s
Description: S/MIME Cryptographic Signature