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Software-defined optical intra-data center network and access control Strategy
Optical Switching and Networking ( IF 1.9 ) Pub Date : 2022-05-06 , DOI: 10.1016/j.osn.2022.100679
P.A. Baziana 1 , G. Drainakis 2 , E. Sykas 2
Affiliation  

The continuously emerging cloud services provide an unprecedented traffic growth into the large-scale data centers (DCs) globally. In this paper, we introduce an optical DC network (DCN) architecture to organize the servers into computing clusters. Since a high percentage of the total DCΝ traffic is served within a cluster, we assume two distinct networks: the intra-cluster passive optical network that handles the traffic destined to any server of the same cluster and the inter-cluster one to route the traffic to any other cluster. The servers interconnection within the passive optical intra-cluster network causes low power consumption, while the Top-of-Cluster (ToC) switch requires less ports than a relative Top-of-Rack (ToR) one to interconnect the same number of servers within the intra network, reducing even more the total power consumption. In the data plane, the intra- and the inter-cluster networks use separate wavelengths. In the control plane, the software-defined networking (SDN) paradigm is followed. Especially, in each cluster we adopt a cluster controller to coordinate the medium access control (MAC) in both the intra and inter-cluster networks. Unlike other studies that assume electrical connectivity with the controller, we consider that it is performed in the optical domain to guarantee the effective synchronized operation of the control and data planes. In our work, we focus on the intra-cluster network. We propose a synchronous transmission software-defined bandwidth allocation (SD-BA) MAC protocol to fairly coordinate the collisions-free transmission of different quality of service traffic categories in the intra-cluster network, based on the wavelength and time division multiplexing (W&TDM) techniques. The proposed DCN architecture along with the SD-MAC protocol provides scalability and efficiency. Simulations results show that the proposed SD-BA MAC protocol achieves almost 100% bandwidth utilization, while it reaches at high loads 145% higher throughput, 573% lower delay and 233% less dropped packets as compared to the relative DMAC network architecture (Zheng and Sun, Apr. 2020) [24]. Also, the proposed intra-cluster DCN architecture is compared to some other currently leading relative ones in terms of throughput and power consumption and it is proven to be a performance and energy efficient DCN solution.



中文翻译:

软件定义的光数据中心内网络和访问控制策略

不断涌现的云服务为全球大型数据中心 (DC) 提供了前所未有的流量增长。在本文中,我们介绍了一种光 DC 网络 (DCN) 架构,将服务器组织成计算集群。由于总 DCN 流量的很大一部分是在集群内提供服务,我们假设有两个不同的网络:集群内无源光网络处理发往同一集群的任何服务器的流量,以及集群间路由流量到任何其他集群。无源光纤集群内网络中的服务器互连导致低功耗,而集群顶部 (ToC) 交换机需要的端口比相对的机架顶部 (ToR) 交换机要少,以便在内部互连相同数量的服务器内部网络,进一步降低总功耗。在数据平面中,集群内和集群间网络使用不同的波长。在控制平面中,遵循软件定义网络 (SDN) 范式。特别是,在每个集群中,我们采用集群控制器来协调集群内和集群间网络中的媒体访问控制(MAC)。与其他假设与控制器电连接的研究不同,我们认为它是在光域中执行的,以保证控制和数据平面的有效同步操作。在我们的工作中,我们专注于集群内网络。我们提出了一种同步传输软件定义带宽分配(SD-BA)MAC协议,以公平地协调集群内网络中不同服务质量流量类别的无冲突传输,基于波长和时分复用 (W&TDM) 技术。提议的 DCN 架构以及 SD-MAC 协议提供了可扩展性和效率。仿真结果表明,与相关的 DMAC 网络架构相比,所提出的 SD-BA MAC 协议实现了几乎 100% 的带宽利用率,而在高负载下,吞吐量提高了 145%,延迟降低了 573%,丢包率降低了 233%(Zheng 和2020 年 4 月,星期日)[24]。此外,所提出的集群内 DCN 架构在吞吐量和功耗方面与其他一些目前领先的相关架构进行了比较,并被证明是一种高性能和节能的 DCN 解决方案。仿真结果表明,与相关的 DMAC 网络架构相比,所提出的 SD-BA MAC 协议实现了几乎 100% 的带宽利用率,而在高负载下,吞吐量提高了 145%,延迟降低了 573%,丢包率降低了 233%(Zheng 和2020 年 4 月,星期日)[24]。此外,所提出的集群内 DCN 架构在吞吐量和功耗方面与其他一些目前领先的相关架构进行了比较,并被证明是一种高性能和节能的 DCN 解决方案。仿真结果表明,与相关的 DMAC 网络架构相比,所提出的 SD-BA MAC 协议实现了几乎 100% 的带宽利用率,而在高负载下,吞吐量提高了 145%,延迟降低了 573%,丢包率降低了 233%(Zheng 和2020 年 4 月,星期日)[24]。此外,所提出的集群内 DCN 架构在吞吐量和功耗方面与其他一些目前领先的相关架构进行了比较,并被证明是一种高性能和节能的 DCN 解决方案。

更新日期:2022-05-06
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