Oversubscription Bounded Multicast Scheduling in Fat-Tree Data Center Networks

Zeng, Guo; Duan, Jun; Yang, Yuanyuan

doi:10.1109/ipdps.2013.30

Cited by 18 publications

(7 citation statements)

References 23 publications

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“…Each ToR is connected to two switches at the aggregation level providing intra-island connectivity as well as links to the core switches. Following an oversubscription approach [34], as it is typically done, the ToR switch is connected to each aggregation-level switch with a 100 Gb/s link. Following the same approach, each aggregation-level switch is also connected to each core-level switch with a 100 Gb/s link.…”

Section: Application Scenariosmentioning

confidence: 99%

10 OAM × 16 Wavelengths Two-Layer Switch Based on an Integrated Mode Multiplexer for 19.2 Tb/s Data Traffic

Scaffardi

Malik

Zhang

et al. 2021

J. Lightwave Technol.

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A two-layer switch exploiting orbital angular momentum (OAM) and wavelength of the light as switching domains is presented, aiming to increase the scalability with respect to the single-layer switches. The switch is able to accept 160 optical Gaussian data inputs on a 16-channel wavelength division multiplexing (WDM) grid and direct each input signals to different output ports exploiting 10 OAMs. The optical switch is based on an integrated OAM multiplexer followed by a compact OAM demultiplexer consisting of two refractive elements. Its experimental characterization confirmed a total enabled throughput of 19.2 Tb/s, thanks to the 30 GHz bandwidth available for each port. The switching time can be lower than 1 µs. The OAM switch power consumption, solely due to the thermal tuning of the OAM emitters, since the OAM demux is passive, is 1.35 mW/Gb/s.In the proposed switching architecture the number of active components, i.e. the power consumption, scales linear with the number of ports. This is favorable in comparison with singlelayer switches that cascade e.g. 2x2 elementary blocks to obtain large port counts, which scale with the square of the number of ports.The switch accepts input and output signals with Gaussian phase profile that propagate through optical fibers and waveguides, thus making it compatible with standard telecom devices. The suitability of the switch to support real data-traffic is proved by successfully testing it with 10G Ethernet and Fiber Channel over Ethernet (FCoE) data traffic and video traffic. A possible application scenario is represented by a data-center network where the switch can be used to create a low-power consumption network parallel to the network based on standard electronic routers, to manage large traffic flows.

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Section: Application Scenariosmentioning

confidence: 99%

10 OAM × 16 Wavelengths Two-Layer Switch Based on an Integrated Mode Multiplexer for 19.2 Tb/s Data Traffic

Scaffardi

Malik

Zhang

et al. 2021

J. Lightwave Technol.

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“…They do so by migrating a portion of their VMs to cold servers. Guo et al (2013) focus on optimizing the distribution of network traffic and throughput using a load balancing technique in a fat-tree data center network. attempt to improve bandwidth utilization by applying concepts of the Stochastic Bin Packing problem (SBP).…”

Section: Bandwidth Oversubscriptionmentioning

confidence: 99%

“…This can severely degrade the performance of the cloud and even lead to outages and failures for some customers (Moreno & Xu, 2012;Williams et al, 2011;Toms & Tordsson, 2013;Ghosh & Naik, 2012;Baset et al, 2012;Zhang et al, 2012;Hines et al, 2011;Jain et al, 2012;Wang, Hosn, & Tang, 2012;Wo et al, 2012;Guo et al, 2013;. CPU overload can result in an abundance of processes waiting to run in a VMs CPU queue (Baset et al, 2012).…”

Section: Risks Of Cloud Oversubscriptionmentioning

confidence: 99%

“…Large overheads and thrashing can seriously impede the performance of the system (Williams et al, 2011;Baset et al, 2012). Finally, network overload can cause bottlenecks that slow progress and can lead to a reduction in resource utilization and oversubscription gains (Baset et al, 2012;Jain et al, 2012;Wo et al, 2012;Guo et al, 2013).…”

Section: Risks Of Cloud Oversubscriptionmentioning

confidence: 99%

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Oimpacts of Multi-Class Oversubscription on Revenues and Performance in the Cloud

Householder¹,

Green²

2014

STCC

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Rising trends in the number of customers turning to the cloud for their computing needs has made effective resource allocation imperative for cloud service providers. In order to maximize profits and reduce waste, providers have started to explore the role of oversubscribing cloud resources. However, the benefits of oversubscription in the cloud are not without inherent risks. This work attempts to unveil the different incentives, risks, and techniques behind oversubscription in a cloud infrastructure. The discrete event simulator CloudSim is used to compare the generated revenue and performance of oversubscribed and non-oversubscribed datacenters. The idea of multi-class service levels used in other overbooked industries is implemented in simulations modeling a priority class of VMs that pay a higher price for better performance. Three simulations are implemented. The first two compare the results of different VM allocation policies without VM migration. The third implements VM migration in an oversubscribed, power-aware datacenter. Results show that oversubscription using multi-class service levels has the potential to increase datacenter revenue, but the benefit comes with the risk of degraded QoS, especially for non-priority customers.

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“…Examples of N-to-1 applications include MapReduce [13] and Search. Whereas efficient routing algorithms for group communication in electrical networks have been thoroughly investigated [19,22], to the best of our knowledge, no existing equivalent work leverages the reconfigurability of optical devices and the adjustable link capacity to optimize for the group communication in optical networks. Recent Data Center Networking (DCN) proposals that couple electrical network with optical network either schedule multicast packets over the pure electrical network (and thus completely ignore the optical components) [15,33], or schedule over the optical network using shortest path routing [11] which results in high packet duplication and network congestion.…”

Section: Introductionmentioning

confidence: 99%

1-to-N and N-to-1 Communication for Optical Networks

Lê

Gerla

2014

Proceedings of the Latin America Networking Conference on LANC 2014

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Efficient 1-to-N and N-to-1 communication benefits numerous data center applications that require group communication by reducing network traffic and improving application throughput. Meanwhile, optical interconnection networks are emerging as a key enabling technology for future data center networking. Optical networks not only support higher bit-rates through optical links, but can also dynamically reconfigure the network topology and link capacities through the optical switch, providing substantial flexibility to various traffic patterns. Currently, there exists limited support for efficient 1-to-N and N-to-1 routing that leverages the advanced features of optical networks.In this paper, we propose a set of algorithms to support 1-to-N and N-to-1 traffic flows in optical networks. We base our work on top of the Optical Switching Architecture (OSA). Through extensive analytical simulations, we show that the proposed algorithms are effective in minimizing the number of optical links used for 1-to-N traffic, while eliminating link bottlenecks for N-to-1 traffic.

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Oversubscription Bounded Multicast Scheduling in Fat-Tree Data Center Networks

Cited by 18 publications

References 23 publications

10 OAM × 16 Wavelengths Two-Layer Switch Based on an Integrated Mode Multiplexer for 19.2 Tb/s Data Traffic

10 OAM × 16 Wavelengths Two-Layer Switch Based on an Integrated Mode Multiplexer for 19.2 Tb/s Data Traffic

Oimpacts of Multi-Class Oversubscription on Revenues and Performance in the Cloud

1-to-N and N-to-1 Communication for Optical Networks

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