Re: [OMPI users] How to use a wrapper for ssh?
Yes, I guess it looks like http://www.open-mpi.org/faq/?category=rsh#rsh-not-ssh is a little out of date. Thanks for the heads-up... On Jul 13, 2011, at 4:35 AM, Paul Kapinos wrote: > Hi Ralph, >>> 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 >>> >>> 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? >> orte_rsh_agent doesn't exist in the 1.4 series :-) >> Only plm_rsh_agent is available in 1.4. "ompi_info --param orte all" and >> "ompi_info --param plm rsh" will confirm that fact. > > If so, then the Wiki is not correct. Maybe someone can correct it? This would > save some time for people like me... > > Best wishes > Paul Kapinos > > > > > -- > 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 > ___ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
Re: [OMPI users] How to use a wrapper for ssh?
Hi Ralph, 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 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? orte_rsh_agent doesn't exist in the 1.4 series :-) Only plm_rsh_agent is available in 1.4. "ompi_info --param orte all" and "ompi_info --param plm rsh" will confirm that fact. If so, then the Wiki is not correct. Maybe someone can correct it? This would save some time for people like me... Best wishes Paul Kapinos -- 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 smime.p7s Description: S/MIME Cryptographic Signature
Re: [OMPI users] How to use a wrapper for ssh?
On Jul 12, 2011, at 2:34 PM, Paul Kapinos wrote:
> 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?
Probably - but I wouldn't recommend it
>
> 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
>
> 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?
orte_rsh_agent doesn't exist in the 1.4 series :-)
Only plm_rsh_agent is available in 1.4. "ompi_info --param orte all" and
"ompi_info --param plm rsh" will confirm that fact.
>
> 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?
>
> 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';
> stat64("/opt/lsf/8.0/linux2.6-glibc2.3-x86_64/bin/WrapPer", 0x8324) = -1
> ENOENT (No such file or directory)
>
> export OMPI_MCA_orte_rsh_agent=WrapPer
> (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", 0x8324) = -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
> ___
> users mailing list
> us...@open-mpi.org
> http://www.open-mpi.org/mailman/listinfo.cgi/users
[OMPI users] How to use a wrapper for ssh?
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
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
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?
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';
stat64("/opt/lsf/8.0/linux2.6-glibc2.3-x86_64/bin/WrapPer", 0x8324)
= -1 ENOENT (No such file or directory)
export OMPI_MCA_orte_rsh_agent=WrapPer
(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", 0x8324) = -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
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