Optimal Provisioning of Light-Trails for Optical Storage Area Networks
Storage area networks (SANs) are potential applications of current optical communications.Contemporary SANs over optical networks, usually limited to local area networks (LANs), use the optical layer for pure transport with minimal intelligence,leading to over-provisioning and high costs. Light-trail technology can play a role in extending SANs into metro and wide area networks (MANs and WANs).Since a light-trail is an optical path that allows multiple node pairs along its route to communicate in one direction, this multi-node bus-like structure allows efficient aggregation of backup data on the way to the data center without the need of expensive optical and electronic switches. In the other direction, a light-trail allows multicasting of recovery data from the data center to all the nodes along its route. We investigate optimal provisioning of light-trails in SANs with general mesh topologies. We formulate the problem in general as an integer linear programming (ILP) optimization problem whose objective is to minimize the maximum link load, yielding high wavelength utilizations. For specific results, we solve the formulated ILP problem for a hypothetical national SAN designed based on the geography of Myanmar. In addition, we vary the data center location and investigate the number of wavelengths required to support the traffic. We observe that locations that require the minimum number of wavelengths are the nodes with high node degrees in the SAN topology.
Phay Thet Lwin Poompat Saengudomlert
Asian Institute of Technology, Thailand
国际会议
成都
英文
372-375
2006-09-18（万方平台首次上网日期，不代表论文的发表时间）