Gigabit ethernet or myrinet ?
lindahl at conservativecomputer.com
Fri Feb 23 20:46:47 PST 2001
On Thu, Feb 22, 2001 at 11:13:18AM +0800, Woo Chat Ming wrote:
> I am going to set up a 100-nodes beowulf cluster
> to do scientific simulation. Is Gigabit ethernet or
> Myrinet better ? Does anyone has performance comparation
> of them ?
The main reason to choose one or another isn't necessarily
performance. Here's a summary:
cards expensive, big switches possible and relatively cheap
mpich/gm gives near peak performance
Gigabit Ethernet over TCP/IP:
cards cheap, big switches expensive and annoying
mpich over tcp/ip gives 1/2 peak performance and eats a lot of cpu
Gigabit Ethernet with MVIA driver:
cost is the same, but only a few cards work with MVIA
mvich (mpich + vi device) is fairly new, and isn't really ready
for prime time yet. (If I'm wrong about this, someone please
Try pricing a 100-port gigabit switch with good bisection bandwidth.
This just happens to be near the sweet spot for Myrinet.
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