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Summary: Review Request: mpich2 - An implementation of MPI
------- Additional Comments From ed@xxxxxxx 2005-11-05 22:09 EST -------
> My understanding previously was that extras package cannot replace
> core ones
Yes, I think thats correct but I can't locate any references in the
Wiki that spell it out. Maybe I just need to look harder? ;-)
> in the particular case of mpich and lam (or/and any other MPI
> implementation), one cannot have simultaneously install and use
> more than one implementation
Actually, you can! One of our clusters at work has no less than five
MPI versions installed, each of which has been built with multiple
different compiler suites (GCC, Intel, PGI, etc.). To visualize the
layout, imagine a directory structure such as:
where each of the above directories contains a complete install with
bin, include, lib, and man subdirs that contain, respectively, all the
necessary binaries, headers, libs, and man pages.
With the above directory layout, all users can manipulate their PATH,
MANPATH, and other environment variables to select the desired combination
of MPI and compiler, etc. And all the environment variable manipulation
can be done in a rather user-friendly way with the "modules" system:
which would also be a nice thing to add to Fedora Extras. So, please
consider installing essentially all of the mpich2 binaries, headers, libs,
man pages, etc. in
since, that way, it will not conflict with lam and one can readily add
additional MPI implementations such as mpich v1 (/usr/lib/mpich) by
following the same pattern.
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