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High Performance Datacenter Networks

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Author by : Dennis Abts
Languange Used : en
Release Date : 2011
Publisher by : Morgan & Claypool Publishers

ISBN : 9781608454020

This book describes the design and engineering tradeoffs of datacenter networks. It describes interconnection networks from topology and network architecture to routing algorithms, and presents opportunities for taking advantage of the emerging technology trends that are influencing router microarchitecture. With the emergence of "many-core" processor chips, it is evident that we will also need "many-port" routing chips to provide a bandwidth-rich network to avoid the performance limiting effects of Amdahl's Law. We provide an overview of conventional topologies and their routing algorithms and show how technology, signaling rates and cost-effective optics are motivating new network topologies that scale up to millions of hosts. The book also provides detailed case studies of two high performance parallel computer systems and their networks. --Book Jacket....

High Performance Networks

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Author by : Dennis Abts
Languange Used : en
Release Date : 2022-05-31
Publisher by : Springer Nature

ISBN : 9783031017308

Datacenter networks provide the communication substrate for large parallel computer systems that form the ecosystem for high performance computing (HPC) systems and modern Internet applications. The design of new datacenter networks is motivated by an array of applications ranging from communication intensive climatology, complex material simulations and molecular dynamics to such Internet applications as Web search, language translation, collaborative Internet applications, streaming video and voice-over-IP. For both Supercomputing and Cloud Computing the network enables distributed applications to communicate and interoperate in an orchestrated and efficient way. This book describes the design and engineering tradeoffs of datacenter networks. It describes interconnection networks from topology and network architecture to routing algorithms, and presents opportunities for taking advantage of the emerging technology trends that are influencing router microarchitecture. With the emergence of "many-core" processor chips, it is evident that we will also need "many-port" routing chips to provide a bandwidth-rich network to avoid the performance limiting effects of Amdahl's Law. We provide an overview of conventional topologies and their routing algorithms and show how technology, signaling rates and cost-effective optics are motivating new network topologies that scale up to millions of hosts. The book also provides detailed case studies of two high performance parallel computer systems and their networks. Table of Contents: Introduction / Background / Topology Basics / High-Radix Topologies / Routing / Scalable Switch Microarchitecture / System Packaging / Case Studies / Closing Remarks...

High Performance Datacenter Networks

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Author by : Dennis Abts
Languange Used : en
Release Date : 2011-02-02
Publisher by : Morgan & Claypool Publishers

ISBN : 9781608454037

High Performance Data Network Design

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Author by : Tony Kenyon
Languange Used : en
Release Date : 2002-01-24
Publisher by : Elsevier

ISBN : 9780080491455

High-Performance Data Network Design contains comprehensive coverage of network design, performance, and availability. Tony Kenyon provides the tools to solve medium- to large-scale data network design problems from the ground up. He lays out a practical and systematic approach that integrates network planning, research, design, and deployment, using state-of-the-art techniques in performance analysis, cost analysis, simulation, and topology modeling. The proliferation and complexity of data networks today is challenging our ability to design and manage them effectively. A new generation of Internet, e-commerce, and multimedia applications has changed traditional assumptions on traffic dynamics, and demands tight quality of service and security guarantees. These issues, combined with the economics of moving large traffic volumes across international backbones, mean that the demands placed on network designers, planners, and managers are now greater than ever before. High-Performance Data Network Design is a "must have" for anyone seriously involved in designing data networks. Together with the companion volume, Data Networks: Routing, Security, and Performance Optimization, this book gives readers the guidance they need to plan, implement, and optimize their enterprise infrastructure. · Provides real insight into the entire design process · Includes basic principles, practical advice, and examples of design for industrial-strength enterprise data networks · Integrates topics often overlooked—backbone optimization, bottleneck analysis, simulation tools, and network costing...

Improving Datacenter Network Performance Via Intelligent Network Edge

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Author by : Keqiang He
Languange Used : en
Release Date : 2017
Publisher by :

ISBN : OCLC:1013189973

Datacenter networks are critical building blocks for modern cloud computing infrastructures. In this dissertation, we show how we can leverage the flexibility and high programmability of datacenter network edge (i.e., end-host networking) [101, 102] to improve the performance of three key functionalities in datacenter networks -- traffic load balancing, congestion control and rate limiting. Datacenter networks need to deal with a variety of workloads, ranging from latency-sensitive small flows to bandwidth-hungry large flows. In-network hardware-based load balancing schemes which are based on flow hashing, e.g., ECMP, cause congestion when hash collisions occur. To solve this problem, we propose a soft-edge load balancing scheme called Presto. Presto load-balances on near uniform-sized small data units (flowcells) and spreads flowcells across the symmetric network via the virtual switches on the senders. Because of fine-grained flowcell-level load balancing, packets may arrive out of order at the receiver side, so we propose a mechanism to handle reordering in the Generic Receive Offload (GRO) functionality below the TCP layer. Presto avoids the hash collision problem and improves traffic load balancing performance significantly. Optimized traffic load balancing alone is not sufficient to guarantee high-performance datacenter networks. Virtual Machine (VM) technology plays an integral role in modern multi-tenant clouds by enabling a diverse set of software to be run on a unified underlying framework. This flexibility, however, comes at the cost of dealing with outdated, inefficient, or misconfigured TCP stacks implemented in the VMs. We propose a congestion control virtualization technique called AC/DC TCP. AC/DC TCP exerts fine-grained control over arbitrary tenant TCP stacks by enforcing per-flow congestion control in the virtual switch (vSwitch) in the hypervisor. AC/DC TCP is light-weight, flexible, scalable and can police non-conforming flows. Besides queueing latency in network switches, we observe that rate limiters on end-hosts can also increase network latency by an order of magnitude or even more. To this end, we propose two techniques -- DEM and SPRING to improve the performance of rate limiters. Our experiment results demonstrate that DEM and SPRING-enabled rate limiters can achieve high stable throughput and low latency....

Network Architectures And Energy Efficiency For High Performance Data Centers

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Author by : Emna Baccour
Languange Used : en
Release Date : 2017
Publisher by :

ISBN : OCLC:1104156856

The increasing trend to migrate applications, computation and storage into more robust systems leads to the emergence of mega data centers hosting tens of thousands of servers. As a result, designing a data center network that interconnects this massive number of servers, and providing efficient and fault-tolerant routing service are becoming an urgent need and a challenge that will be addressed in this thesis. Since this is a hot research topic, many solutions are proposed like adapting new interconnection technologies and new algorithms for data centers. However, many of these solutions generally suffer from performance problems, or can be quite costly. In addition, devoted efforts have not focused on quality of service and power efficiency on data center networks. So, in order to provide a novel solution that challenges the drawbacks of other researches and involves their advantages, we propose to develop new data center interconnection networks that aim to build a scalable, cost-effective, high performant and QoS-capable networking infrastructure. In addition, we suggest to implement power aware algorithms to make the network energy effective. Hence, we will particularly investigate the following issues: 1) Fixing architectural and topological properties of the new proposed data centers and evaluating their performances and capacities of providing robust systems under a faulty environment. 2) Proposing routing, load-balancing, fault-tolerance and power efficient algorithms to apply on our architectures and examining their complexity and how they satisfy the system requirements. 3) Integrating quality of service. 4) Comparing our proposed data centers and algorithms to existing solutions under a realistic environment. In this thesis, we investigate a quite challenging topic where we intend, first, to study the existing models, propose improvements and suggest new methodologies and algorithms....

Optical Interconnects For Future Data Center Networks

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Author by : Christoforos Kachris
Languange Used : en
Release Date : 2012-11-07
Publisher by : Springer Science & Business Media

ISBN : 9781461446309

Optical Interconnects in Future Data Center Networks covers optical networks and how they can be used to provide high bandwidth, energy efficient interconnects for future data centers with increased communication bandwidth requirements. This contributed volume presents an integrated view of the future requirements of the data centers and serves as a reference work for some of the most advanced solutions that have been proposed by major universities and companies. Collecting the most recent and innovative optical interconnects for data center networks that have been presented in the research community by universities and industries, this book is a valuable reference to researchers, students, professors and engineers interested in the domain of high performance interconnects and data center networks. Additionally, Optical Interconnects in Future Data Center Networks provides invaluable insights into the benefits and advantages of optical interconnects and how they can be a promising alternative for future data center networks....

Cloud Networking

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Author by : Gary Lee
Languange Used : en
Release Date : 2014-06-09
Publisher by : Morgan Kaufmann

ISBN : 9780128008164

Cloud Networking: Understanding Cloud-Based Data Center Networks explains the evolution of established networking technologies into distributed, cloud-based networks. Starting with an overview of cloud technologies, the book explains how cloud data center networks leverage distributed systems for network virtualization, storage networking, and software-defined networking. The author offers insider perspective to key components that make a cloud network possible such as switch fabric technology and data center networking standards. The final chapters look ahead to developments in architectures, fabric technology, interconnections, and more. By the end of the book, readers will understand core networking technologies and how they’re used in a cloud data center. Understand existing and emerging networking technologies that combine to form cloud data center networks Explains the evolution of data centers from enterprise to private and public cloud networks Reviews network virtualization standards for multi-tenant data center environments Includes cutting-edge detail on the latest switch fabric technologies from the networking team in Intel...

Datacenter Connectivity Technologies

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Author by : Frank Chang
Languange Used : en
Release Date : 2022-09-01
Publisher by : CRC Press

ISBN : 9781000794939

In recent years, investments by cloud companies in mega data centers and associated network infrastructure has created a very active and dynamic segment in the optical components and modules market. Optical interconnect technologies at high speed play a critical role for the growth of mega data centers, which flood the networks with unprecedented amount of data traffic. Datacenter Connectivity Technologies: Principles and Practice provides a comprehensive and in-depth look at the development of various optical connectivity technologies which are making an impact on the building of data centers. The technologies span from short range connectivity, as low as 100 meters with multi-mode fiber (MMF) links inside data centers, to long distances of hundreds of kilometers with single-mode fiber (SMF) links between data centers.This book is the first of its kind to address various advanced technologies connecting data centers. It represents a collection of achievements and the latest developments from well-known industry experts and academic researchers active in this field....

Centralized Performance Control For Datacenter Networks

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Author by : Jonathan Perry (Ph. D.)
Languange Used : en
Release Date : 2017
Publisher by :

ISBN : OCLC:1005140050

An ideal datacenter network should allow operators to specify policy for resource allocation between users or applications, while providing several properties, including low median and tail latency, high utilization (throughput), and congestion (loss) avoidance. Current datacenter networks inherit the principles that went into the design of the Internet, where packet transmission and path selection decisions are distributed among the endpoints and routers, which impede obtaining the desired properties. Instead, we propose that a centralized controller should tightly regulate senders' use of the network according to operator policy, and evaluate two architectures: Fastpass and Flowtune. In Fastpass, the controller decides when each packet should be transmitted and what path it should follow. Fastpass incorporates two fast algorithms: the first determines the time at which each packet should be transmitted, while the second determines the path to use for that packet. We deployed and evaluated Fastpass in a portion of Facebook's datacenter network. Our results show that Fastpass achieves high throughput comparable to current networks at a 240 x reduction is queue lengths, achieves much fairer and consistent flow throughputs than the baseline TCP, scales to schedule 2.21 Terabits/s of traffic in software on eight cores, and achieves a 2.5 x reduction in the number of TCP retransmissions in a latency-sensitive service at Facebook. In Flowtune, congestion control decisions are made at the granularity of a flowlet, not a packet, so allocations change only when flowlets arrive or leave. The centralized allocator receives flowlet start and end notifications from endpoints, and computes optimal rates using a new, fast method for network utility maximization. A normalization algorithm ensures allocations do not exceed link capacities. Flowtune updates rate allocations for 4600 servers in 31 ps regardless of link capacities. Experiments show that Flowtune outperforms DCTCP, pFabric, sfqCoDel, and XCP on tail packet delays in various settings, and converges to optimal rates within a few packets rather than over several RTTs. EC2 benchmarks show a fairer rate allocation than Linux's Cubic....