A reconfigurable, regular-topology cluster/datacenter network using commodity optical switches

Lugones, Diego; Katrinis, Kostas; Theodoropoulos, Georgios; Collier, Martin

doi:10.1016/j.future.2013.04.016

Cited by 15 publications

(27 citation statements)

References 16 publications

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“…The bandwidth of the interconnection is wasted during this RTT which results in decreased overall network through-put in the presence of high diversity traffic. A similar trend of performance of decreasing bandwidth with increasing traffic diversity is also observed in other optical interconnects [16,32].…”

Section: Throughputsupporting

confidence: 79%

“…It can be observed that the size of the optical switch (port density) controls the maximum number of racks while the number of optical switches controls the core oversubscription ratio. Single-stage core interconnect topology with multiple optical switches allows our design to both incrementally scaled up (in capacity) and scaled out (in the number of racks) without requiring major re-cabling and network reconfiguration similar to the topology used in reconfigurable architecture [32].…”

Section: Scalabilitymentioning

confidence: 99%

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Performance evaluation of hybrid optical switch architecture for data center networks

Imran

Collier

Landais

et al. 2016

Optical Switching and Networking

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In response to the need for high bandwidth and power efficient data center interconnection networks, different interconnects have been proposed based on the optical technology used: microelectromechanical system (MEMS), optical cross connects (OXCs), arrayed waveguide grating routers (AWGRs) and semiconductor optical amplifier (SOAs). MEMS switches are based on mature technology, have low insertion loss and cross-talk, and are data rate independent. They are also the most scalable and the cheapest class of optical switches. However, the reconfiguration time of these switches is of the order of tens of milliseconds while fast optical switches have switching time in the range of a few nanoseconds. Fast optical switches can be based on AWGRs in conjunction with tunable wavelength converters or tunable lasers or they are based on SOAs in broadcast-and-select architecture. In this paper, we propose an optical interconnect architecture for the large scale data centers. The proposed interconnect: Hybrid Optical Switch Architecture (HOSA) is a hybrid design that features slow and fast optical switches. The hybrid design leverages strengths of both types of optical switches. To reduce complexity, we employ a single stage core topology that can be easily scaled up (in capacity) and scaled out (in the number of racks) without requiring major re-cabling and network reconfiguration. We investigate the scalability of the HOSA and show that by using a single stage core topology, it can be scaled to a hundreds of thousands of servers. We also investigate a trade-off between cost and power consumption of our design by comparing it with other well-known interconnects by using analytical modelling. We demonstrate power efficiency as compared to other conventional interconnects on account of upfront CAPEX but the additional CAPEX incurred in deploying our solution instead of traditional architecture is mitigated to some extent by reduced OPEX, due to its greater energy efficiency. We evaluate the performance of the system using network-level simulation by considering diverse workload communication patterns and system design parameters. Our results show low latency and high throughput with different workload communication patterns. 1.1.2. Scalability Large cloud computing data centers owned by Amazon, Microsoft and Google have tens of thousands of servers. With the expected growth in data center traffic, the number of servers in data centers is destined to increase which poses a significant challenge to the data center interconnection network. 1.1.3. Traffic locality The projection of traffic growth in data centers according to the Cisco cloud index [3] is shown in Fig. 2. Observe that during the period from 2013 to 2018, the majority of data center traffic will remain within the data center while only a small portion of the traffic will go to the external network. Some of the traffic will also be exchanged between data centers for distributed and replicated services between databases in different data centers. Due to this high traff...

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Section: Throughputsupporting

confidence: 79%

Section: Scalabilitymentioning

confidence: 99%

Performance evaluation of hybrid optical switch architecture for data center networks

Imran

Collier

Landais

et al. 2016

Optical Switching and Networking

Self Cite

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show abstract

“…Optical interconnect architectures that are based on optical MEMS switches are presented in studies [9,11,12,24,31]. A hybrid electrical/optical switch (Helios) architecture for data centers [12] uses a single optical MEMS switch and an array of electrical switches at the core while A hybrid packet/circuit switch (HyPaC) [31] also uses a single optical MEMS switch at the core but it has various layers of electrical switches i.e.…”

Section: Architectures Based On Memsmentioning

confidence: 99%

“…Other MEMS based architectures [9,11,24] do not have these limitation because they provide full bandwidth between any ToR pair. The optical switch architecture (OSA) [9] uses only a MEMS switch at the core and no electrical switches at the core.…”

Section: Architectures Based On Memsmentioning

confidence: 99%

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Optical Interconnects for Cloud Computing Data Centers: Recent Advances and Future Challenges

Imran¹,

Haleem²

2018

Proceedings of International Symposium on Grids and Clouds 2018 in Conjunction With Frontiers in Computational Drug Discovery —

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Flat ball topology basics multi‐transceivers 100 km/2.5 Tbps gigabit‐ethernet PON architecture for energy efficiency in data centers

Kumari,

Arya

2023

Trans Emerging Tel Tech

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Existing electronic data sources desire high‐power requisites, in order to obtain a large bandwidth, minimum power dissipation and low latency in networks. In this instance, a gigabit ethernet passive optical network (GEPON) architecture based on a dynamic Flat Ball topology incorporating multi‐transceivers to minimize network energy consumption via passive devices along with bandwidth reconfiguration potential and low latency is reported in this paper. The proposed architecture connected with 200 nodes exhibits 26 as well as 40 dB total loss in uplink as well as downlink considerably, compared to Sirius and Sandwich tree. Also, Flat ball GEPON architecture permits 9 and 10 dBm energy saving in downlink as well as uplink, respectively, than conventional GEPON architecture at 1 ms delay. The proposed architecture with 50 Erlang load allows energy ratio of 39% in downlink and 37% in uplink, at 25 × 100 Gbps traffic rate for 55 nodes. Besides this, the faithful fiber range of 100 km considering fiber no‐linearities and impairments can be obtained successfully. The architecture can be bordered with 1:64 splitting ratio with 35 ms in downlink as well as 31 ms in uplink transmission delay at bit error rate of 10−3. Additionally, on comparing the proposed topology with existing architectures depict its superiority with minimal implementation cost, low‐power dissipation, less traffic delay as well as high scalability and high flexibility.

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A reconfigurable, regular-topology cluster/datacenter network using commodity optical switches

Cited by 15 publications

References 16 publications

Performance evaluation of hybrid optical switch architecture for data center networks

Performance evaluation of hybrid optical switch architecture for data center networks

Optical Interconnects for Cloud Computing Data Centers: Recent Advances and Future Challenges

Flat ball topology basics multi‐transceivers 100 km/2.5 Tbps gigabit‐ethernet PON architecture for energy efficiency in data centers

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