Guidance/suggestions for small (6-12 port) gigabit switches and gigabit NICs?

Douglas Eadline deadline at plogic.com
Mon Sep 8 11:29:02 EDT 2003


On Sat, 6 Sep 2003, Michael T. Prinkey wrote:

> On Sat, 6 Sep 2003, Douglas Eadline wrote:
> 
> > Mike, a few questions, if you do not mind kernel and driver versions,
> > model of switch, motherboard?
> 
> 2.4.18 for those results, I believe.  I saw about the same with 2.4.19.  
> I haven't tested 2.4.20.  I used the tg3 drivers as packaged in the
> kernel.  I used the e1000 drivers for the onboards.  I think the
> motherboards were INTEL SE7500CW2.  CPUs were 2.4 GHz Xeons.  The 
> switch was a DLink DGS1016T.  I have built 3 or 4 clusters using similar 
> configurations.  More recent ones have used the Tyan Tiger i7501 
> motherboard instead.
> 
> > 
> > Have you run the 302t's thought the switch or the intel's
> > as xover? Just curious.
> >
>  
> No.  I only had time to benchmark while I was burning the units in and 
> didn't take the time to rewire the network.  Wanted to, but didn't find 
> time.
> 
> > Sounds like you are have built this machine to solve a
> > specific type of problem. How is it working?
> > 
> 
> All of the clusters are running a commercial CFD package (the big one!)  
> and are typically used for relatively small runs (2 to 16 CPUs).  For
> these runs, principle axis decomposition is the default and about 98% of
> the traffic crosses the low-latency nearest neighbor links.  For this
> application, I think such a configuration is near optimal.  One day I hope
> to have a long enough lead time on delivery to actually benchmark with and
> without the xover links.  For now, my only performance metric is
> anecdotal...I have several satisfied customers.

That is what counts.

> 
> Best,
> 
> Mike Prinkey
> Aeolus Research, Inc.
> 
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