OSA: An Optical Switching Architecture for Data Center Networks with Unprecedented Flexibility

Chen, Kai; Singlay, Ankit; Singhz, Atul; Ramachandranz, Kishore; Xuz, Lei; Zhangz, Yueping; Wen, Xuyun; Chen, Yan

doi:10.1007/978-3-319-61052-8_4

Cited by 95 publications

(118 citation statements)

References 19 publications

(9 reference statements)

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“…However, current research do not meet the demands of exascale computer. On one hand, the diverse applications do not have a clear characteristic of traffic convergence, like current datacenters for certain communication purposes or clear point-to-point hotspots traffic among persistent partner processors (Chen et al 2014(Chen et al , 2015. On the other hand, the state-of-art optoelectronic designs are based on fat-tree (Ghobadi et al 2016) and dragonfly (Wen et al 2017), but their application to torus-interconnected network remains unknown.…”

Section: Related Workmentioning

confidence: 99%

Wormhole optical network: a new architecture to solve long diameter problem in exascale computer

et al. 2019

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The exascale computer will be built in the near future thanks to rapid innovations in semiconductor logic, memory, architectures, interconnections and other essential technologies. It is difficult to design an interconnection network that combines high performance with low power consumption. Therefore, building an interconnection network with high cost performance plays a critical role in building such a large scale system. Currently, torus-interconnected network like 6D-Torus possesses suitable properties for the petascale computer. However, the diameter within the torus-interconnected network is too long to achieve efficient global communication in the exascale computer. In addition, a direct connection method is not adaptive to the diverse characteristics of traffic. Here, we propose an architecture called Wormhole Optical Network (WON) for the exascale computer which is based on optical circuit switching. WON was designed to fully integrate into the electrical network of 6D-Torus. WON allows for the use of three novel technologies, namely the dynamic topology with optical links, algorithm of cross dimension order routing, and strategy of flow control for deadlock-free. We evaluated WON using both a prototype system and a simulator for the exascale computer. Our analysis shows that compared to the traditional electrical architecture, WON architecture reduced the time of data communication by 14-29% on exascale, a result obtained for a wide selection of diverse applications. Through enabling an SDN controller to adjust topology, WON maintains high utilization of optical links for inter-process communication from diverse applications. Further, we quantified WON's flexibility of job deployment for mitigating hotspot traffic. We show that WON reduced latency by 20-35% in the large-range deployment and improved throughput by 30% in the long-distance deployment.

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Section: Related Workmentioning

confidence: 99%

Wormhole optical network: a new architecture to solve long diameter problem in exascale computer

et al. 2019

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“…This implies that no new transponders will be introduced at both end‐nodes and optical grooming takes place at the physical optical layer. The signal remains exclusively in the optical domain, avoiding time and resource consuming Optical‐Electrical‐Optical operations (O‐E‐O). A shortest path algorithm like Dijkstra is required to fetch the right path according to its physical length property.…”

Section: Ichnaea Heuristicmentioning

confidence: 99%

Towards energy efficiency in virtual topology design of elastic optical networks

Kyriakopoulos

Papadimitriou

Nicopolitidis

2018

Int J Communication

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Elastic optical networks offer a reliable platform for achieving energy efficiency by supporting extensive optical grooming of variable-rate data traffic along with the traditional electrical data aggregation methods. The procedure of routing and spectrum allocation in a topology of nodes has explicit effect to the amount of consumed power. A new energy-efficient method for designing the virtual topology in IP-over-elastic networks is introduced and evaluated. It is concluded that it consumes less power under different elastic transponder types, it designs the virtual topology using fewer transponders, and finally, there is a slight increase in the number of end-to-end lightpath hops. The proposed method is characterized by high performance and low lightpath establishment complexity. Therefore, it is suitable for a broad range of network configurations and transponder types.

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“…Moreover, optical circuit switching has been proposed to combine both inter-and intra-DC connectivity for long-lived flows [18]. Indeed, dynamic optical provisioning has been proposed for DCs using micro-electromechanical systems (MEMS) in Helios [19] and cThrough [20] architectures; and with a combination of MEMS and WSS in Proteus [5] and OSA [8].…”

Section: B Inter-datacenter Assumptions / Requirementsmentioning

confidence: 99%

“…These solutions offer fast switching capabilities in the order of tens of milliseconds, but do not permit wavelength signals to be routed independently [5], [6]. On the contrary, WSSbased solutions enable wavelengths to be switched individually [7], [8]. However, the drawback of these latter solutions is the relatively slow switching time of the WSS devices.…”

Section: Introduction Lastic Optical Networking (Eon) Is a Viablementioning

confidence: 99%

Traffic Allocation Strategies in WSS-Based Dynamic Optical Networks

Shakeri¹,

Garrich

Bravalheri³

et al. 2017

J. Opt. Commun. Netw.

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-Elastic optical networking (EON) is a viable solution to meet future dynamic capacity requirements of Internet Service Provider (ISP) and inter-datacenter networks. At the core of EON, Wavelength Selective Switches (WSSs) are applied to individually route optical circuits, while assigning an arbitrary bandwidth to each circuit. Critically, the WSS control scheme and configuration time may delay the creation time of each circuit in the network. In this paper, we first detail the WSS-based optical data-plane implementation of a metropolitan network test-bed. Then, we review an SDN application, designed to enable dynamic and fast circuit setup. Subsequently, we introduce a WSS logical model that captures the WSS time-sequence and is used to estimate the circuit setup response time. Then, we present two batch service policies that aim to reduce the circuit-setup response time by bundling multiple WSS reconfiguration steps into a single SDN command. Resulting performance gains are estimated through simulation.

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OSA: An Optical Switching Architecture for Data Center Networks with Unprecedented Flexibility

Cited by 95 publications

References 19 publications

Wormhole optical network: a new architecture to solve long diameter problem in exascale computer

Wormhole optical network: a new architecture to solve long diameter problem in exascale computer

Towards energy efficiency in virtual topology design of elastic optical networks

Traffic Allocation Strategies in WSS-Based Dynamic Optical Networks

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