[Beowulf] Re: building a new cluster

Glen Gardner Glen.Gardner at verizon.net
Sat Sep 4 13:11:25 EDT 2004


I am not familiar with infiniband, but if you have a switch with both 
infiniband and ethernet, I suspect you can probably do okay with it. You 
just have to realize that the 100 MBit network is not as fat a paipe as 
infiniband. So when the infiniband network wants to talk to the 
ethernet, that transaction is going to be slow.

Recently I needed to connect a couple of gigabit ethernet macines to 
multiple fast ethernet machines, and ended up building a concentrator 
out of cheap gigabit switches so that the gigabit bandwidth was more or 
less usable. I picked up a little latency, but it was still an 
improvement over plugging the gigabit nodes straight into a fast 
ethernet switch.


Michael Lodico K1EG wrote:

>That might be a solution. But we also want to chain our current old
>cluster (based on 100 Mbps ethernet switch) into the new cluster. Will
>that be a problem (Infiniband + Ethernet)?
>
>SCH
>
>I would think that combining the two you are going to limit the system
>to 100 Mbps plus you could start getting data clashes from the faster IB
>which could slow down the network even more.
>
>Michael Lodico
>
>_______________________________________________
>Beowulf mailing list, Beowulf at beowulf.org
>To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
>
>  
>

-- 
Glen E. Gardner, Jr.
AA8C
AMSAT MEMBER 10593



http://members.bellatlantic.net/~vze24qhw/index.html



_______________________________________________
Beowulf mailing list, Beowulf at beowulf.org
To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf



More information about the Beowulf mailing list