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Technology-Driven, Highly-Scalable Dragonfly Topology

John Kim, Wiliam J. Dally, Steve Scott, Dennis Abts
2008 2008 International Symposium on Computer Architecture  
In this paper, we introduce the dragonfly topology which uses a group of high-radix routers as a virtual router to increase the effective radix of the network.  ...  Evolving technology and increasing pin-bandwidth motivate the use of high-radix routers to reduce the diameter, latency, and cost of interconnection networks.  ...  By increasing the effective radix, the dragonfly topology is highly scalable -with radix-64 routers, the topology scales to over 256k nodes with a network diameter of only three hops.  ... 
doi:10.1109/isca.2008.19 dblp:conf/isca/KimDSA08 fatcat:oitsuv223jbodf255rctr5kezi

Technology-Driven, Highly-Scalable Dragonfly Topology

John Kim, Wiliam J. Dally, Steve Scott, Dennis Abts
2008 SIGARCH Computer Architecture News  
In this paper, we introduce the dragonfly topology which uses a group of high-radix routers as a virtual router to increase the effective radix of the network.  ...  Evolving technology and increasing pin-bandwidth motivate the use of high-radix routers to reduce the diameter, latency, and cost of interconnection networks.  ...  By increasing the effective radix, the dragonfly topology is highly scalable -with radix-64 routers, the topology scales to over 256k nodes with a network diameter of only three hops.  ... 
doi:10.1145/1394608.1382129 fatcat:lytq7l3yivdbrlzrfqypxf4jr4

Simulation of the Performance and Scalability of MPI Communications of Atmospheric Models running on Exascale Supercomputers

Yongjun Zheng, Philippe Marguinaud
2018 Geoscientific Model Development Discussions  
In addition, we observe that the impacts of interconnect topologies and routing algorithms on the performance and scalability of transpositions, halo exchange, and allreduce operations are significant,  ...  The experiments show that the performance of communications can be improved when congestion is mitigated by a proper configuration of the topology and routing algorithm, which uniformly distribute the  ...  its congestion is not 466 uniform (Fig. 7a) , the congestion of the ugal routing algorithm for the dragonfly-MM topology 467 is large and highly non-uniform (Fig. 7c) .  ... 
doi:10.5194/gmd-2017-301 fatcat:uww7qlewlja2vdqca5rwbqcefi

Simulation of the performance and scalability of message passing interface (MPI) communications of atmospheric models running on exascale supercomputers

Yongjun Zheng, Philippe Marguinaud
2018 Geoscientific Model Development  
In addition, we observe that the impacts of interconnect topologies and routing algorithms on the performance and scalability of transpositions, halo exchange, and allreduce operations are significant.  ...  the problem of the scalability presented in the grid-point models.  ...  This work was supported by the ESCAPE (Energy-efficient Scalable Algorithms for Weather Prediction at Exascale) project.  ... 
doi:10.5194/gmd-11-3409-2018 fatcat:mcvjoed62zgbdk3ja6fbxfzanu

Optimal Low-Latency Network Topologies for Cluster Performance Enhancement [article]

Yuefan Deng, Meng Guo, Alexandre F. Ramos, Xiaolong Huang, Zhipeng Xu, Weifeng Liu
2019 arXiv   pre-print
We approach our heuristic by constructing clusters of up to 36 nodes having Dragonfly, torus, ring, Chvatal, Wagner, Bidiakis and several other topologies with minimal mean path lengths and by simulating  ...  In communication-intensive benchmarks, clusters with optimal network topologies out-perform those with mainstream topologies by several folds.  ...  Because of hardware homogeneity, we conclude that our results on the impact of network topology remain valid when cutting edge technology is used.  ... 
arXiv:1904.00513v1 fatcat:eyjwnbtdnnf5zd7oubfs2kmrgq

INRFlow: An interconnection networks research flow-level simulation framework

Javier Navaridas, Jose A. Pascual, Alejandro Erickson, Iain A. Stewart, Mikel Luján
2019 Journal of Parallel and Distributed Computing  
We conclude the paper with a case study that analyses the scalability of several typical topologies.  ...  It features a completely modular design in which adding new topologies, routings or traffic models requires minimum effort.  ...  This has both driven forward the development of a plethora of IT technologies and motivated the construction of increasingly larger computing facilities.  ... 
doi:10.1016/j.jpdc.2019.03.013 fatcat:m2pvuszu6ja2zjjgcndnhsvjai

PolarFly: A Cost-Effective and Flexible Low-Diameter Topology [article]

Kartik Lakhotia, Maciej Besta, Laura Monroe, Kelly Isham, Patrick Iff, Torsten Hoefler, Fabrizio Petrini
2022 arXiv   pre-print
PolarFly enjoys many other topological properties highly relevant in practice, such as a modular design and expandability that allow incremental growth in network size without rewiring the whole network  ...  Our evaluation shows that PolarFly outperforms competitive networks in terms of scalability, cost and performance for various traffic patterns.  ...  . • Scalability. At the same time, they asymptotically reach the Moore bound, surpassing the scalability of all other diameter-2 topologies.  ... 
arXiv:2208.01695v1 fatcat:w6kept4sk5fu3lnywqu6yedhza

A Survey of High-Performance Interconnection Networks in High-Performance Computer Systems

Ping-Jing Lu, Ming-Che Lai, Jun-Sheng Chang
2022 Electronics  
Its performance and scalability directly affect the performance and scalability of the whole system.  ...  This article also comprehensively discusses the latest technologies and trends in this field.  ...  The use of the dragonfly topology is largely driven by cost so as to reduce the length of the optical cable and the cost of the system.  ... 
doi:10.3390/electronics11091369 fatcat:lv7nczjbsbe3jikypuw6bfbc4u

The Landscape of Exascale Research

Stijn Heldens, Pieter Hijma, Ben Van Werkhoven, Jason Maassen, Adam S. Z. Belloum, Rob V. Van Nieuwpoort
2020 ACM Computing Surveys  
We use a three-stage approach in which we (1) discuss various exascale landmark studies, (2) use data-driven techniques to analyze the large collection of related literature, and (3) discuss eight research  ...  [20] propose routing techniques to prevent hot-spots in dragonfly networks. Totoni et al.  ...  [148] study the effect of task placement in systems with dragonfly networks. Dorier et al.  ... 
doi:10.1145/3372390 fatcat:jhtwt7pxd5c5darhz75hiqgsnq

Extreme Scale Plasma Turbulence Simulations on Top Supercomputers Worldwide

William Tang, Bei Wang, Stephane Ethier, Grzegorz Kwasniewski, Torsten Hoefler, Khaled Z. Ibrahim, Kamesh Madduri, Samuel Williams, Leonid Oliker, Carlos Rosales-Fernandez, Tim Williams
2016 SC16: International Conference for High Performance Computing, Networking, Storage and Analysis  
We observe good scalability for Mira (5D Torus) and Piz Daint (Dragonfly) with Titan (3D Torus) showing reduced scalability beyond 1K nodes.  ...  Different topologies affect the ratio between the bandwidth in toroidal and radial direction For example, on Mira's high-dimensional 5D torus topology with highly optimized collectives, GTC-P scales almost  ... 
doi:10.1109/sc.2016.42 dblp:conf/sc/TangWEKHIMWORW16 fatcat:7b4g3qga4faxhijxfocvajpibu

Challenges in Simulating Communication Systems

Peter Barnes
2022 SIGSIM Conference on Principles of Advanced Discrete Simulation  
Interconnect topologies considered include fat-tree, dragonfly, megafly (a fattree-dragonfly hybrid), and hyper-X, and for each multiple routing algorithms were used.  ...  Mubarak, et al, explore the relative performance of two interconnect topologies, torus and dragonfly, for a suite of application communication patterns. [24] This work is notable in a representing application  ... 
doi:10.1145/3518997.3534120 fatcat:ijaghtp4kbdshd3zjxjp6h375e

Leveraging Fog Computing for Scalable IoT Datacenter Using Spine-Leaf Network Topology

K. C. Okafor, Ifeyinwa E. Achumba, Gloria A. Chukwudebe, Gordon C. Ononiwu
2017 Journal of Electrical and Computer Engineering  
Besides, the scalability requirements found in the current IoT data processing (in the cloud) can hardly be used for applications such as assisted living systems, Big Data analytic solutions, and smart  ...  Its integration with a massively scaled spine-leaf (SL) network topology is highlighted. This is contrasted with a legacy multitier layered architecture housing network services and routing policies.  ...  Introduction Scalability is a desirable feature of a disruptive technology such as the Internet of Things (IoT) and IoE.  ... 
doi:10.1155/2017/2363240 fatcat:7x7xvrmuf5dm7ixlu4m33ryxta

Extreme Big Data (EBD): Next Generation Big Data Infrastructure Technologies Towards Yottabyte/Year

2014 Supercomputing Frontiers and Innovations  
by technologies such as IoT [12] .  ...  various predictions on "breaking down of silos" where organizations will open up their data for public consumption, either for free or for a fee, along with immense increase in varieties of data sources driven  ...  hypercube topologies, to highdegree fully-connected Dragonfly topologies [22] , to the HyperX [11] topology, and to recently proposed fully random topologies [23] .  ... 
doi:10.14529/jsfi140206 fatcat:fxzoyb3hgzaallrbrs4jkks2im

Efficient Routing Mechanisms for Dragonfly Networks

Marina Garcia, Enrique Vallejo, Ramon Beivide, Miguel Odriozola, Mateo Valero
2013 2013 42nd International Conference on Parallel Processing  
These networks, known as Dragonflies, outperform traditional topologies such as multi-trees or tori, in cost and scalability.  ...  High-radix hierarchical networks are costeffective topologies for large scale computers. In such networks, routers are organized in supernodes, with local and global interconnections.  ...  INTRODUCTION The search for scalable interconnection networks constitutes a key challenge in the design of highly parallel systems such as supercomputers and datacenters.  ... 
doi:10.1109/icpp.2013.72 dblp:conf/icpp/Garcia0BOV13 fatcat:fxtpogo4cfaknodsgpkxrc7laq

Aquila: A unified, low-latency fabric for datacenter networks

Dan Gibson, Hema Hariharan, Eric Lance, Moray McLaren, Behnam Montazeri, Arjun Singh, Stephen Wang, Hassan M. G. Wassel, Zhehua Wu, Sunghwan Yoo, Raghuraman Balasubramanian, Prashant Chandra (+13 others)
2022 Symposium on Networked Systems Design and Implementation  
RELATED WORK Topology and Cell-switching. Aquila uses a direct-connect topology, Dragonfly [30] . The Cray Cascade system [17] utilizes a Dragonfly topology as the basis for an HPC fabric.  ...  The Dragonfly cell fabric We selected the Dragonfly topology to manage the cost of optical links, shown in Figure 1 .  ... 
dblp:conf/nsdi/GibsonHLMMSWWWY22 fatcat:jfmbudr6trhttc6hixh2vyw5wa
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