[Bug 173719] Review Request: openmpi - a new MPI implementation
bugzilla at redhat.com
bugzilla at redhat.com
Thu Feb 16 01:45:41 UTC 2006
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Summary: Review Request: openmpi - a new MPI implementation
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=173719
------- Additional Comments From ed at eh3.com 2006-02-15 20:45 EST -------
Hi Jason, is there any chance that you (and the other Red Hat packagers)
would consider using environment-modules for side-by-side installs of
different MPI implementations? Compared to the alternatives system,
environment-modules is far superior. Alternatives does not (and probably
never will) gracefully handle situations such as multiple implementations
of the same API. For instance, what do you do with the LAM, MPICH, etc.
man pages? If you use environment-modules, its very easy to install as
many different MPI implimentations (and their corresponding MAN pages,
etc.) as you want and then define multiple MPI "modules" (that is, scripts
within the environment-modules system) that each set the correct MANPATH and any
other values. And I mention man pages only as an example -- the idea readily
entends to binaries, libs, headers, what-have-you...
Further, the use of environment-modules is a __de facto__ standard. The
vast majority of (super-)computing centers, clusters, etc. where MPI is
chiefly used also use environment-modules. Its popular at these locations
exactly because it works so smoothly. Its a simple, easily understood,
extensible, and elegant approach. And it provides end users with maximal
flexibility and choice.
To the best of my knowledge, not a *single* system on this planet uses
alternatives for MPI. Its borderline moronic. Why would you folks
want to ignore the hard-won wisdom of an entire field and go with some
clunky, inferior alternatives-based approach when you can have something
so much better?
PS: Orion has very helpfully packaged environment-modules for Extras so
its *very* easy for you folks to adopt... [Hint-hint...!]
PPS: I'll be glad to discuss this further with anyone who has questions.
Feel free to contact me by email, etc.
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