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Subject: Re: [OMPI users] Passing LD_LIBRARY_PATH to orted
From: Ralph Castain (rhc_at_[hidden])
Date: 2008-10-14 15:03:59


You might consider using something like "module" - we use that system
for exactly this reason. Works quite well and solves the multiple
compiler issue.

Ralph

On Oct 14, 2008, at 12:56 PM, Craig Tierney wrote:

> George Bosilca wrote:
>> The option to expand the remote LD_LIBRARY_PATH, in such a way that
>> Open MPI related applications have their dependencies satisfied, is
>> in the trunk. The fact that the compiler requires some
>> LD_LIBRARY_PATH is out of the scope of an MPI implementation, and I
>> don't think we should take care of it.
>> Passing the local LD_LIBRARY_PATH to the remote nodes doesn't make
>> much sense. There are plenty of environment, where the head node
>> have a different configuration than the compute nodes. Again, in
>> this case my original solution seems not that bad. If you copy (or
>> make a link if you prefer) in the Open MPI lib directory to the
>> compiler shared libraries, this will work.
>> george.
>
> This does work. It just increases maintenance for each new version
> of OpenMPI. How often does a head node have a different
> configuration
> than the compute node? It would see that this would even more
> support the
> passing of LD_LIBRARY_PATH for OpenMPI tools to support a
> heterogeneous
> configuration as you described.
>
>
> Thanks,
> Craig
>
>
>
>
>> On Oct 14, 2008, at 12:11 PM, Craig Tierney wrote:
>>> George Bosilca wrote:
>>>> Craig,
>>>> This is a problem with the Intel libraries and not the Open MPI
>>>> ones. You have to somehow make these libraries available on the
>>>> compute nodes.
>>>> What I usually do (but it's not the best way to solve this
>>>> problem) is to copy these libraries somewhere on my home area and
>>>> to add the directory to my LD_LIBRARY_PATH.
>>>> george.
>>>
>>> This is ok when you only ever use one compiler, but it isn't very
>>> flexible.
>>> I want to keep it as simple as possible for my users, while having
>>> a maintainable
>>> system.
>>>
>>> The libraries are on the compute nodes, the problem deals with
>>> supporting
>>> multiple versions of compilers. I can't just list all of the lib
>>> paths
>>> in ld.so.conf, because then the user will never get the correct
>>> one. I can't
>>> specify a static LD_LIBRARY_PATH for the same reason. I would
>>> prefer not
>>> to build my system libraries static.
>>>
>>> To the OpenMPI developers, what is your opinion on changing
>>> orterun/mpirun
>>> to pass LD_LIBRARY_PATH to the remote hosts when starting OpenMPI
>>> processes?
>>> By hand, all that would be done is:
>>>
>>> env LD_LIBRARY_PATH=$LD_LIBRARY_PATH $OPMIPATH/orted <args>
>>>
>>> This would ensure that orted is launched correctly.
>>>
>>> Or is it better to just build the OpenMPI tools statically? We also
>>> use other compilers (PGI, Lahey) so I need a solution that works for
>>> all of them.
>>>
>>> Thanks,
>>> Craig
>>>
>>>
>>>
>>>> On Oct 10, 2008, at 6:17 PM, Craig Tierney wrote:
>>>>> I am having problems launching openmpi jobs on my system. I
>>>>> support multiple versions
>>>>> of MPI and compilers using GNU Modules. For the default
>>>>> compiler, everything is fine.
>>>>> For non-default, I am having problems.
>>>>>
>>>>> I built Openmpi-1.2.6 (and 1.2.7) with the following configure
>>>>> options:
>>>>>
>>>>> # module load intel/10.1
>>>>> # ./configure CC=icc CXX=icpc F77=ifort FC=ifort F90=ifort --
>>>>> prefix=/opt/openmpi/1.2.7-intel-10.1 --without-
>>>>> gridengine --enable-io-romio --with-io-romio-flags=--with-file-
>>>>> sys=nfs+ufs --with-openib=/opt/hjet/ofed/1.3.1
>>>>>
>>>>> When I launch a job, I run the module command for the right
>>>>> compiler/MPI version to set the paths
>>>>> correctly. Mpirun passes LD_LIBRARY_PATH to the executable I am
>>>>> launching, but not orted.
>>>>>
>>>>> When orted is launched on the remote system, the LD_LIBRARY_PATH
>>>>> doesn't come with, and the Intel 10.1 libraries can't be found.
>>>>>
>>>>> /opt/openmpi/1.2.7-intel-10.1/bin/orted: error while loading
>>>>> shared libraries: libintlc.so.5: cannot open shared object file:
>>>>> No such file or directory
>>>>>
>>>>> How do others solve this problem?
>>>>>
>>>>> Thanks,
>>>>> Craig
>>>>>
>>>>>
>>>>> --
>>>>> Craig Tierney (craig.tierney_at_[hidden])
>>>>> _______________________________________________
>>>>> users mailing list
>>>>> users_at_[hidden]
>>>>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>>>> _______________________________________________
>>>> users mailing list
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>>>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>>>
>>>
>>> --
>>> Craig Tierney (craig.tierney_at_[hidden])
>>> _______________________________________________
>>> users mailing list
>>> users_at_[hidden]
>>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>> _______________________________________________
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>
>
> --
> Craig Tierney (craig.tierney_at_[hidden])
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