The Research On Hybrid Electrical/Optical Data Center Networks And Scheduling Strategy

The mature application of virtualization technology and the rapid development of cloud computing technology has brought explosive growth in business volume for the data center.Only in 2016 years,the data generated by the business volume has reached 7000 EByte level,and will continue to grow at an average rate of 24.7% per annum.Explosive growth in business volume and data drives the growth of data center scale and presents new challenges for data center networks.Due to low throughput,high latency and energy consumption,traditional electrical data center networks cannot meet the performance needs of future data centers.In order to overcome the performance bottleneck caused by the traditional data center network,the researchers introduced the optical interconnection technology for the data center network,and proposed two types of data center networks: hybrid electrical/optical interconnect and all optical interconnect.The introduction of optical interconnect technology improves the performance of data center networks.However,there are still three main problems: centralized control system constraints,non-modularity and the lack of scalability.In order to solve the three main problems existing in the current optical data center network,the N-Dimensional Modular Data Network(NDM)is proposed.For centralized control system constraints,NDM eliminates the constraints by deploying multiple smallersized optical switches based on distributed control systems in the network;for non-modular problem,NDM makes the arbitrary dimension structure can be constructed by the basic module,so the data center network construction process can be standardized,and the construction efficiency can be improved;for the lack of scalability,thanks to the distributed control system and the modular expansion mode,the scale of NDM is not limited by the port number of optical switches and controllers,thus NDM can contain tens of millions of racks.In order to make the NDM more feasible and applicable,firstly,the thesis uses the commercial AWG to design the switching node supporting the optical packet switching and the AWG-based scheduling strategy for NDM.Secondly,the thesis uses the commercial MEMS designs a switching node that supports optical circuit switching for NDM,and designs a wavelength scheduling strategy to avoid the internal wavelength conflict of MEMS.In addition,the corresponding MEMS configuration strategy is designed to support more to one match of MEMS.The simulation results show that the latency saturation point of AWGbased NDM architecture is increased by 33.3% and the saturation throughput is increased by 24.3%;the latency saturation of MEMS-based NDM architecture Point increased by 28.8%,saturation point throughput increased by 22.9% compared with the c-Through architecture in the same scale and traffic mode.In addition,AWG-based and MEMS-based NDM architectures are stable over both latency saturation and saturation throughput,and are better than c-Through architectures when faced with changes in network size or network traffic.However,the MEMS-based NDM architecture has a higher average network latency than the c-Through architecture,subject to MEMS configuration latency.