[CPMD-list] Performance on beowulf cluster

[Christian Tuma]

Hello,

your problem may be hardware related. What kind of network between the
nodes is used? For CPMD fast communication between the nodes is essential,
in our group we observed the same problem when using e.g. Fast Ethernet
which was totally insufficient. Even if you use a much better network 
hardware the chipset on the motherboard where the network is connected
to has to show the corresponding performance features. You should have a
look at all this.
Finally, you may switch from MPICH to LAM/MPI to get a little better, but,
however, the substantial hardware problem cannot be fixed this way.

Good luck,
Christian.

-- 
Christian Tuma             Humboldt-Universitaet Berlin
ct at chemie.hu-berlin.de     Arbeitsgruppe Quantenchemie (Prof. Sauer)
phone: +49-30-20937140     Brook-Taylor-Str. 2, 12489 Berlin, GERMANY
fax:   +49-30-20937136     http://www.chemie.hu-berlin.de/ag_sauer