Star-Replaced Networks: A Generalised Class of Dual-Port Server-Centric Data Centre Networks
We propose a new generic construction for the design of dual-port server-centric data centre networks so that: every server-node is adjacent to exactly one switch-node and exactly one server-node; and every switch-node is adjacent only to server-nodes. Our construction facilitates the transformation of well-studied topologies from interconnection networks, along with their networking properties, into viable server-centric data centre network topologies. As an example, we instantiate this construction with generalized hypercubes as the base graphs so as to obtain the data centre networks GQ*. We empirically compare GQ* with well-established architectures, namely FiConn and DPillar, using a comprehensive number of performance metrics: network throughput, mean distance, load balancing capability, scalability, and fault tolerance. We find that GQ* performs much better than FiConn as regards these metrics and that it seems a competitive alternative to DPillar because it offers similar performance with a much lower number of networking components. Further, we present a routing algorithm for GQ* and show it provides excellent performance in terms of average path-lengths as well as high reliability in the presence of a significant number of link failures.
dual-port server-centric data centre networks interconnection networks generalized hypercubes fault tolerance routing performance evaluation topological properties