Re: [ESPResSo] Hardware Requirements for Espresso and Other Things

[Olaf Lenz]

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Hi!

Torsten Stuehn wrote:
>> The even more expensive big shared memory machines are not really worth
>> it, as ESPResSo only uses MPI parallelization, so the shared memory can
>> not be effectively used.

> I do not agree to that. The native MPI implementations of the big expensive
> shared memory machines (e.g. IBM Regatta Clusters) are usually very well
> optimized for the underlying architecture.

I didn't want to imply that the machines cannot be effectively used, I
only wanted to say that ESPResSo cannot use the shared memory
effectively. Therefore, it is a waste of money to buy an expensive
shared memory machine, where a much cheaper cluster with fast
interconnects and distributed memory provides the same computing power.

Cheers
        Olaf
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