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Hi OpenMPI folks,
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
Q1: Would this work?
2. use MCA parameters described in
to bend the call to my wrapper, e.g.
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.
Why I believe so?
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?
P.S. reproducing: just set the envvars and do 'strace -f mpiexec ...'
---> look'n for 'WrapPer';
= -1 ENOENT (No such file or directory)
(do not forget to unset OMPI_MCA_plm_rsh_agent :o)
---> still looking for 'ssh'
stat64("/opt/lsf/8.0/linux2.6-glibc2.3-x86_64/bin/ssh", 0xffff8324) = -1
ENOENT (No such file or directory)
===> 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