Hassen, F and Mhamdi, L (2017) A Scalable Packet-Switch Architecture Based on OQ NoCs for Data Center Networks. Computer Networks, 127. pp. 81-93. ISSN 1389-1286
Abstract
Data Center switches need guarantee high throughput, resiliency and scalability for large-scale networks with constantly floating requirements. Multistage packet switches have been a pervasive solution to implement high-capacity Data Center Networks (DCNs) switches and routers. Yet, classical multistage switching architectures with their Space-Memory variants have shown limited performance. Most proposals prove either too complex to implement or not cost effective. In this paper, we present a highly scalable packet-switch for the DCN environment, in which we exploit the Network-on-Chip (NoC) design paradigm to replace the single-hop crossbars with multi-hop Switching Elements (SEs). In particular, we describe a three-stage switch with Output-Queued Unidirectional NoCs (OQ-UDN) in the central stage of the Clos-network. The design has several advantages over conventional multistage switches. First, it uses a simple Round-Robin (RR) packet dispatching scheme and avoids the need for complex and costly input modules. Besides, it offers better load balancing, a pipelined scheduling and more path-diversity. We assess the performance of the switch in terms of throughput, end-to-end latency and blocking probability using Markov chain analysis, and we propose an analytical model that integrates the various design parameters. Through extensive simulations, we show that the switching architecture achieves high performance under different types of traffic, and that both the analytical and experimental results correlate over wide range of evaluation settings.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 Elsevier B.V. This is an author produced version of a paper published in Computer Networks. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Next-generation networking; Packet switching; Clos-network; NoC; OQ; Analytical model |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Institute of Communication & Power Networks (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 11 Aug 2017 12:10 |
Last Modified: | 10 Aug 2018 00:38 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.comnet.2017.08.003 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:120080 |