Griffin: Programmable Optical DataCenter With SDN Enabled Function Planning and Virtualisation
Griffin: Programmable Optical DataCenter With SDN Enabled Function Planning and Virtualisation
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DOI：
10.1109/jlt.2015.2440480
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发表时间：
2015-12
影响因子：
4.7
通讯作者：
Bijan Rahimzadeh Rofoee;G. Zervas;Yan Yan-Yan;D. Simeonidou
中科院分区：
文献类型：
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作者：
Bijan Rahimzadeh Rofoee;G. Zervas;Yan Yan-Yan;D. Simeonidou
光网络技术由于其固有的高带宽和低延迟特性，在数据中心内部互联中具有很大的吸引力。随着带宽需求的增长，IT和网络基础设施的数量和规模也在不断增加，这给电力、成本和空间消耗带来了压力。因此，可编程光网络解决方案具有高度的可控性、业务粒度和可扩展性，可以极大地提高直流互联的运营效率和资源效率。本文提出并报道了一种新的功能可编程和应用感知的dc内技术。硬件平台采用FPGA实现机架顶（ToR）交换机，支持两种主要的软件定义网络功能(a)以太网over WDM和(b)以太网over TDM子WDM。每个交换机都可以被编程成一个光学以太网或亚波长传输系统。时分复用功能进一步支持时间片和帧的一系列附加可编程功能。该系统可以按需控制和无故障切换功能。该平台在功能和特性上具有独特的灵活性，可配置为在不同的处理时间、吞吐量和延迟下运行，支持按需服务质量（QoS）定义，以匹配不同的云应用程序需求。光快速交换机支持tor之间的全光传输，进一步支持低延迟和资源效率。建立了一个多级软件定义控制器，在第一阶段，通过重新利用数据平面功能和控制平面（算法）特征，利用应用需求虚拟地创建功能可编程子网。在第二阶段，它允许在应用程序期间动态分配子网的资源。该平台的特点是使用不同的QoS指标，并针对数据中心用例进行了评估。
Optical networking technologies are very attractive for intra-DataCenter (DC) interconnectivity due to their intrinsic high-bandwidth and low-latency characteristics. As the bandwidth demand grows, quantity and size of IT and network infrastructure grows, which puts pressure on power, cost, and space consumption. Therefore, programmable optical networking solutions, which are highly controllable and provide granularity and scalability in services, can greatly enhance operations and resource efficiency for DC interconnects. This paper proposes and reports on a novel function-programmable and application-aware intra-DC technology. The hardware platform uses FPGA implementation of top-of-rack (ToR) switch which supports two main software-defined network functions of (a) Ethernet over WDM and (b) Ethernet over TDM sub-WDM. Each switch can be programmed to virtually operate as an optical Ethernet or subwavelength transport system. The TDM function further supports a range of additional programmable features in time-slice and frames. The system can be controlled to switch between the functions on-demand and on a hitless manner. This platform with unique flexibility in functions and features is configured to operate with various processing times, throughput, and delays, enables on-demand quality of service (QoS) definition to match diverse cloud application requirements. Optical fast switches enable all-optical transport between the ToRs, further supporting low-latency and resource efficiency. A multistage software-defined controller is built which at the first stage uses application requirements to virtually create function programmable subnetworks by repurposing the data plane functions as well as control plane (algorithms) features. In the second stage, it allows dynamic allocation of resources of the subnetwork for the duration of the application. This platform is characterised to operate with different QoS metrics and evaluated for DC use cases.