[gmx-users] scaling on xeons

[Anton Feenstra]

Y U Sasidhar wrote:

> I have run dppc bench mark on our dual xeon(1.8 GHz/1.4Ghz):
> 
> on 1.8 GHz Machine
> 1 node = 129 ps/day
> 2 nodes on same machine = 198 ps/day
> scaling = 76%
> ==============
> 2 nodes:  1.8 GHz + 1.4 GHz  = 167 ps/day
> scaling = 64%
> =================
> 
> will I benefit if I use Gigabit switch and ethernet card ?
> right now we use 10/100 fast ethernet switch and intel ether express pro 
> 100B network card

Your main problem will be load imablance between the 1.4G and 1.8G machines,
so that both can never be faster than twice the speed of the slowest. There
doesn't seem much to gain by Gb ethernet.


-- 
Groetjes,

Anton
  _____________ _______________________________________________________
|             |                                                       |
|  _   _  ___,| K. Anton Feenstra                                     |
| / \ / \'| | | Dept. of Pharmacochem. - Vrije Universiteit Amsterdam |
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