I am wondering if any of you use some "advanced" topologies (like tree/fat-tree/mesh/torus/hypercube [1]) that is used in the HPC world, with commodity hardware and scale-out properties.
[1]: http://www.ssrc.ucsc.edu/Papers/hospodor-mss04.pdf
[1]: http://www.ssrc.ucsc.edu/Papers/hospodor-mss04.pdf