A Scalable Packet-Switch Architecture Based on OQ NoCs for Data Center Networks
| Autor: | Lotfi Mhamdi, Fadoua Hassen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Computer Networks and Communications
business.industry Network packet Computer science 05 social sciences 020206 networking & telecommunications Throughput 02 engineering and technology Load balancing (computing) Scheduling (computing) Packet switch Packet switching Clos network Scalability Next-generation network 050501 criminology 0202 electrical engineering electronic engineering information engineering Data center business 0505 law Computer network |
| ISSN: | 1389-1286 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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