Re: [gentoo-cluster] Switchable MPI

[Andrew D. Fant]

Donnie,
     I think the real solution here is to use modules ( 
http://modules.sourceforge.net ) to handle the different versions of mpi. I 
filed a bug about using this for switching alternate virtuals a couple years 
ago, but nobody seemed to be particularly interested.  I've got a grad student 
working on something to let users switch between mpi for gcc and mpi for the 
portland group compilers.  I am most certainly not the right person to do the 
heavy lifting on this, but I do have an ebuild for modules I could contribute to 
the cause.

Andy

Donnie Berkholz wrote:
> Hi all,
>
> One thing we really, really need to get working is allowing multiple MPI
> implementations to be installed at once and having a tool to switch
> between them at two levels: system, and per-user [1].
>
> The system level could operate via symlinks where needed and system
> variables such as LDPATH in /etc/env.d/, and the per-user level would
> have to operate using purely user-level environment variables.
>
> In my opinion, this is the single biggest thing we need right now to
> make Gentoo better for clustering, particularly as we start adding more
> MPI implementations such as mpich2 and open-mpi.
>
> I've spoken to a few people about making this happen in the past, but
> they all seem to have disappeared. Would anyone like to take this task on?
>
> Thanks,
> Donnie
>
> 1. http://bugs.gentoo.org/show_bug.cgi?id=44132
>


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Andrew Fant           | The lion and the calf shall lie   | Disclaimer:
andrew.fant@×××××.edu | down together, but the calf won't | Do you REALLY
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Tufts University      |                  W. Allen         | speak for Tufts?
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