Guidance/suggestions for small (6-12 port) gigabit switches and gigabit NICs?
Michael T. Prinkey
mprinkey at aeolusresearch.com
Sat Sep 6 12:30:19 EDT 2003
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
> 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
> 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.
Aeolus Research, Inc.
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