A Network Topology for Composable Infrastructures

Abstract: This paper proposes a passive optical backplane as a new network topology for composable computing infrastructures. The topology provides a high capacity, low-latency and flexible fabric that interconnects disaggregated resource components. The network topology is dedicated to inter-resource communication between composed logical hosts to ensure effective performance. We formulated a mixed integer linear programming (MILP) model that dynamically creates logical networks to support intra logical host communication over the physical network topology. The MILP performs energy efficient logical network instantiation given each application resource demand. The topology can achieve 1Tbps capacity per resource node given appropriate wavelength transmission data rate and the right number of wavelengths per node.