I probably won't get around to adding openmpi myself before release, but it
is the sort of thing that can be added pretty easily after release, since it
is just a matter of some config files and perhaps a few lines in the config
script. I guess I have found both mpich and lam very suitable for use
myself, so have not been in a panic to add every mpi implementation
imaginable. As of the last release, I looked at openmpi and actually chose
to not add it at that time because they effectively had no documentation
yet; I found it hard to believe that documentation is unnecessary. To me, a
much bigger issue on cluster usability is interconnect hardware. Folks
often buy gigabit ethernet because it is cheap, but infiniband will do a
much better job. If you are only talking about 2-4 cpu's, it may not be
such a big deal.
Regards - Bob Duke
----- Original Message -----
From: "Francesco Pietra" <chiendarret.yahoo.com>
To: "Amber" <amber.scripps.edu>
Sent: Wednesday, February 27, 2008 1:08 PM
Subject: AMBER: Amber: shared memory vs cluster
>I need more power from my private computing equipments, currently running
>Amber
> 9, Dock6.1 and NWChem5.1 on Debian Linux amd64 multi dual opteron shared
> memory.
>
> In the perspective of Amber 10, where should my (modest) investment be
> better
> directed: shared memory or cluster? I mean, will Amber 10 deal efficiently
> with
> a home-arranged cluster from dual-opteron units? All that in the
> perspective
> that for both NWChem and Dock I also need much much RAM.
>
> In particular, will efforts by Amber developers be spent to let easily
> compile
> pmend on OpenMPI? I found OpenMPI easy to use in combination with Intel
> compilers, while I had no good config file from where to start, this is
> the
> reason.
>
> Thanks for helping my planning
>
> francesco pietra
>
>
>
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Received on Sun Mar 02 2008 - 06:07:11 PST
