NeTS: Small: WaveCube: A Scalable, Fault-Tolerant, High-Performance Optical Data Center Architecture

有两种方法可以防止数据中心网络中的局部瓶颈：1)构建一个能够支持最坏情况数据流的过度供应的网络，或者2)在数据中心的通信热点之间提供快速（微秒到毫秒）的按需供应链路（通常是光链路）。该项目通过一种新颖的数据中心网络（dcn）互连设计来研究和原型化第二种方法，该互连设计具有良好的容错性和可扩展性，称为WaveCube。特别是，使用光波长选择开关（WSS）技术可以在实现多路径和动态带宽调度的同时节省成本，从而提高性能。WaveCube拓扑结构是一个多维立方体，光纤承载多个波长（波分复用或WDM）。WDM极大地减少了数据中心所需的光纤数量，但也产生了波长分配问题。因此，该项目将研究通过多个wss提供连接所需的波长分配算法，同时考虑到容错性和性能。该项目将比较WaveCube的布线复杂性和其他建议的方法。该项目还将研究基于wavecube的数据中心在各种处理负载下的性能，其中一些来自实际测量，一些来自合成。更广泛的影响：PI将创建本科生数据中心网络课程。倡议还描述了一项计划，旨在增加未被充分代表的少数民族和妇女参与拟议的研究活动，并通过与AGEP、REU、CRA CREW等项目的合作，展示了这种推广活动。PI正在与一个工业组织合作。

There are two approaches to preventing localized bottlenecks in datacenter networks: 1) building an over-provisioned network capable of supporting worse-case dataflows, or 2) providing rapid (microseconds to millisecond) on-demand provisioning of links, usually optical, between communication hotspots in the datacenter. This projects studies and prototypes the second approach via a novel interconnect design for datacenter networks (DCNs) with good fault-tolerance and scalability features, termed WaveCube. In particular, optical wavelength selective switch (WSS) technology is used to achieve cost savings while implementing multipathing and dynamic bandwidth scheduling for improved performance. The WaveCube topology is a multi-dimension cube with fiber carrying multiple wavelengths (Wavelength Division Multiplexing or WDM). WDM dramatically cuts down on the number of fibers needed in a datacenter but gives rise to a wavelength assignment problem. Thus the project will study wavelength assignment algorithms needed to provide connections via multiple WSSs taking into account fault-tolerance and performance. The project will compare WaveCube wiring complexity to that of other suggested approaches. The project will also study the performance of WaveCube-based data centers under a variety of processing loads, some derived from actual measurements and some synthetic.Broader Impact:The PI will create undergraduate datacenter networking courses. The PI also describes a plan to increase participation of underrepresented minorities and women in the proposed research activities and had previous demonstrations of such outreach via work with programs such as AGEP, REU, CRA CREW. The PI's are collaborating with an industrial organization.