With the rapid spread of cloud-based services, intra-datacenter traffic is growing exponentially. In typical present datacenters, top-of-rack switches, which act as gateways to computer systems, are interconnected via multi-tier electrical-switching networks. The electrical switch necessitates costly optical-to-electrical and electrical-to-optical conversion. Furthermore, its power consumption will explode due to the ever-increasing intra-datacenter traffic. To handle the large volumes of traffic in a cost-effective manner, optical switches are expected to play a key role in future intra-datacenter networks. To realize such cost-effective networks, high-port-count optical circuit switches will be a critical component. High-port-count optical circuit switches can be used to construct a flat network, and we can reduce the dependence on costly multi-tier electrical-switching networks. In this tutorial paper, we overview high-port-count optical circuit switch architectures for future intra-datacenter networks and discuss their characteristics. The high-port-count switch can be attained by combining the different dimensions of space and wavelength.

中文翻译：

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用于数据中心网络的高端口数光路交换机【特邀教程】

随着基于云的服务的快速普及，数据中心内的流量呈指数级增长。在当前典型的数据中心中，作为计算机系统网关的架顶式交换机通过多层电气交换网络互连。电开关需要昂贵的光电和电光转换。此外，由于数据中心内流量的不断增加，其功耗将呈爆炸式增长。为了以经济高效的方式处理大量流量，预计光交换机将在未来的数据中心内网络中发挥关键作用。为了实现这种具有成本效益的网络，高端口数的光电路开关将是一个关键组件。高端口数光路交换机可用于构建扁平网络，我们可以减少对昂贵的多层电气交换网络的依赖。在本教程论文中，我们概述了未来数据中心内网络的高端口数光电路交换机架构并讨论了它们的特性。结合空间和波长的不同维度，可以实现高端口数的开关。