On Tue, May 22, 2007 at 09:02:38AM -0400, Larry Stewart wrote: > I haven't heard of anyone using a diamond lattice to wire a cluster. > We're > using a Kautz graph, which already makes my brain hurt. > What would the advantages of a diamond lattice be? In terms of
4 is the smallest number of edges for a node to span a 3-d mesh, without using a switch. It is suitable for problems with a purely local communication pattern only. 6 edges/node would be better, since resulting in a cubic primitive lattice of nodes (3d torus, or similiar), but I haven't seen a low end box with more than four GBit NICs. Speaking of which, why is nobody integrating small (8-port) GBit switches on motherboards themselves? I've only seen this in firewalls so far. The disadvantage of a diamond lattice is that decomposing your physical system is more complicated (I don't even know which polyhedra and common faces one would wind up with). It is probably not worth the hassle. > bisection and diameter? > Ease of wiring? -- Eugen* Leitl <a href="http://leitl.org";>leitl</a> http://leitl.org ______________________________________________________________ ICBM: 48.07100, 11.36820 http://www.ativel.com http://postbiota.org 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE _______________________________________________ Beowulf mailing list, [email protected] To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
