Free-scaling your data center |
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Authors: | László Gyarmati András Gulyás Balázs Sonkoly Tuan A Trinh Gergely Biczók |
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Affiliation: | 1. Telefonica Research, Plaza de Ernest Lluch i Martín, 5, floor 15, 08019 Barcelona, Spain;2. Budapest University of Technology and Economics, Department of Telecommunications and Media Informatics, 2 Magyar tudósok körútja, Budapest, H-1117, Hungary;3. Norwegian University of Science and Technology, Department of Telematics, O.S. Bragstads plass 2a, N-7491 Trondheim, Norway;4. Hungarian Academy of Science (MTA) Information System Research Group, Széchenyi István tér 9., 1051 Budapest, Hungary;5. MTA-BME Future Internet Research Group, Széchenyi István tér 9., 1051 Budapest, Hungary;6. Inter-University Centre for Telecommunications and Informatics, Kassai út 26., 4028 Debrecen, Hungary;1. Télécom ParisTech, 46 rue Barrault, 75634 Paris, France;2. Bell Labs, Alcatel-Lucent Villarceaux, Route de Villejust 91620 Nozay, France;3. France Télécom R&D – Orange Labs, 38-40 rue du général Leclerc, 92794 Issy-les-Moulineaux, France;1. Department of Computing, Curtin University of Technology, Perth, WA, Australia;2. University of Wollongong, Northfields Ave., Wollongong, NSW, Australia;1. Dep. Matemàtica Aplicada IV, EPSC, Universitat Politècnica de Catalunya, c/Esteve Terradas 5, Castelldefels (Barcelona), Catalonia, Spain;2. Shanghai Key Lab of Intelligent Information Processing, School of Computer Science, Fudan University, Shanghai 200433, China |
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Abstract: | The increasing popularity of both small and large private clouds and expanding public clouds poses new requirements to data center (DC) architectures. First, DC architectures should be incrementally scalable allowing the creation of DCs of arbitrary size with consistent performance characteristics. Second, initial DC deployments should be incrementally expandable supporting small-scale upgrades without decreasing operation efficiency. A DC architecture possessing both properties satisfies the requirement of free-scaling.Recent work in DC design focuses on traditional performance and scalability characteristics, therefore resulting in symmetric topologies whose upgradability is coarse-grained at best. In our earlier work we proposed Scafida, an asymmetric, scale-free network inspired DC topology which scales incrementally and has favorable structural characteristics. In this paper, we build on Scafida and propose a full-fledged DC architecture achieving free-scaling called FScafida. Our main contribution is threefold. First, we propose an organic expansion algorithm for FScafida; this combined with Scafida’s flexible original design results in a freely scalable architecture. Second, we introduce the Effective Source Routing mechanism that provides near-shortest paths, multi-path and multicast capability, and low signaling overhead by exploiting the benefits of the FScafida topology. Third, we show based on extensive simulations and a prototype implementation that FScafida is capable of handling the traffic patterns characteristic of both enterprise and cloud data centers, tolerates network equipment failures to a high degree, and allows for high bisection bandwidth. |
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Keywords: | Data center Scale-free Routing Fault-tolerance Asymmetric topology |
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