Optical path scheduling methods considering host bandwidth in data center networks

In recent years, data centers have needed to process large amounts of data because of various growing Internet services. In a data center, it is important to provide high performance and to reduce energy costs. Consequently, optical network technology is a solution for a data center network. In particular, optical circuit switching is considered as a realistic architecture. Helios, which is a data center network architecture with optical circuit switching, considers only rack-to-rack paths. Helios has a problem in that packet losses occur if many connections are sent to one host. In this paper, we propose two path establishment methods that occupy or share one wavelength link with optical circuit switching in a data center network. We also evaluate performance through simulation. As a result, we show that the proposed path establishment method sharing a wavelength link has approximately a 74% higher throughput than Helios.