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检索条件"任意字段=Proceedings of the 14th USENIX Conference on Networked Systems Design and Implementation"

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BTrDB: optimizing storage system design for timeseries processing 16

BTrDB: optimizing storage system design for timeseries proce...

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proceedings of the 14th usenix conference on File and Storage Technologies

作者： Michael P. Andersen David E. Culler University of California Berkeley

ISBN: (纸本)9781931971287

the increase in high-precision, high-sample-rate telemetry timeseries poses a problem for existing timeseries databases which can neither cope with the throughput demands of these streams nor provide the necessary primitives for effective analysis of them. We present a novel abstraction for telemetry timeseries data and a data structure for providing this abstraction: a time-partitioning version-annotated copy-on-write tree. An implementation in Go is shown to outperform existing solutions, demonstrating a throughput of 53 million inserted values per second and 119 million queried values per second on a four-node cluster. the system achieves a 2.9× compression ratio and satisfies statistical queries spanning a year of data in under 200ms, as demonstrated on a year-long production deployment storing 2.1 trillion data points. the principles and design of this database are generally applicable to a large variety of timeseries types and represent a significant advance in the development of technology for the Internet of things.

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the design and implementation of open vSwitch 15

The design and implementation of open vSwitch

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proceedings of the 12th usenix conference on networked systems design and implementation

作者： Ben Pfaff Justin Pettit Teemu Koponen Ethan J. Jackson Andy Zhou Jarno Rajahalme Jesse Gross Alex Wang Jonathan Stringer Pravin Shelar Keith Amidon Martín Casado VMware Awake Networks

ISBN: (纸本)9781931971218

We describe the design and implementation of Open vSwitch, a multi-layer, open source virtual switch for all major hypervisor platforms. Open vSwitch was designed de novo for networking in virtual environments, resulting in major design departures from traditional software switching architectures. We detail the advanced flow classification and caching techniques that Open vSwitch uses to optimize its operations and conserve hypervisor resources. We evaluate Open vSwitch performance, drawing from our deployment experiences over the past seven years of using and improving Open vSwitch.

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Explicit path control in commodity data centers: design and applications 15

Explicit path control in commodity data centers: design and ...

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proceedings of the 12th usenix conference on networked systems design and implementation

作者： Shuihai Hu Kai Chen Haitao Wu Wei Bai Chang Lan Hao Wang Hongze Zhao Chuanxiong Guo Hong Kong University of Science and Technology Microsoft UC Berkeley Duke University

ISBN: (纸本)9781931971218

Many data center network (DCN) applications require explicit routing path control over the underlying topologies. this paper introduces XPath, a simple, practical and readily-deployable way to implement explicit path control, using existing commodity switches. At its core, XPath explicitly identifies an end-to-end path with a path ID and leverages a two-step compression algorithm to pre-install all the desired paths into IP TCAM tables of commodity switches. Our evaluation and implementation show that XPath scales to large DCNs and is readily-deployable. Furthermore, on our testbed, we integrate XPath into four applications to showcase its utility.

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High throughput data center topology design 14

High throughput data center topology design

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proceedings of the 11th usenix conference on networked systems design and implementation

作者： Ankit Singla P. Brighten Godfrey Alexandra Kolla University of Illinois at Urbana-Champaign

ISBN: (纸本)9781931971096

With high throughput networks acquiring a crucial role in supporting data-intensive applications, a variety of data center network topologies have been proposed to achieve high capacity at low cost. While this work explores a large number of design points, even in the limited case of a network of identical switches, no proposal has been able to claim any notion of optimality. the case of heterogeneous networks, incorporating multiple line-speeds and port-counts as data centers grow over time, introduces even greater *** this paper, we present the first non-trivial upper-bound on network throughput under uniform traffic patterns for any topology with identical switches. We then show that random graphs achieve throughput surprisingly close to this bound, within a few percent at the scale of a few thousand servers. Apart from demonstrating that homogeneous topology design may be reaching its limits, this result also motivates our use of random graphs as building blocks for design of heterogeneous networks. Given a heterogeneous pool of network switches, we explore through experiments and analysis, how the distribution of servers across switches and the interconnection of switches affect network throughput. We apply these insights to a real-world heterogeneous data center topology, VL2, demonstrating as much as 43% higher throughput with the same equipment.

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Clotho: An elastic MapReduce workload/runtime co-design

Clotho: An elastic MapReduce workload/runtime co-design

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12th International Workshop on Adaptive and Reflective Middleware, ARM 2013 - Co-located with ACM/IFIP/usenix 14th International Middleware conference, Middleware 2013

作者： Shi, Weiming Hong, Bo Georgia Institute of Technology United States

ISBN: (纸本)9781450325530

the resource management of a multi-tenant MapReduce cluster can be hard given unpredictable user demands. Conventional resource management scheme would inevitably create a fair amount of spare resource fragments in the system. On the other hand, MapReduce workloads are prone to have a bottleneck stage in the execution pipeline. To address these two issues under a coherent framework, this paper presents Clotho, a MapReduce workload and runtime co-design that can opportunistically utilize the spare resource fragments in the system to alleviate the bottleneck stage of MapReduce workloads while honoring the SLAs of existing systems. We describe the design and the implementation of Clotho, evaluate it with benchmarks drawn from real MapReduce applications, and demonstrate that it can effectively utilize the spare CPU resource fragments and meanwhile improve the performance of user programs if there is potential to speed up the bottleneck stage of the entire MapReduce execution pipeline. © 2013 ACM.

关键词： MapReduce

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Collaborative Services for Customized Production in networked Companies

Collaborative Services for Customized Production in Networke...

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14th IFIP WG 5.5 Working conference on Virtual Enterprises (PROVE-VE)

作者： Fornasiero, Rosanna Bastos, Joao Azevedo, Americo Zangiacomi, Andrea Coscia, Eva CNR ITIA Inst Ind Technol & Automat Via Bassini 15 I-20133 Milan Italy Univ Porto INESC TEC P-4200465 Oporto Portugal Univ Porto Fac Engn P-4200465 Oporto Portugal TXT E Solut SPA I-20126 Milan Italy

ISBN: (纸本)9783642405433;9783642405426

Increasingly, consumer demand of fashionable products is arising as significant challenge for company managers. In order to respond to this demand, companies are asked to supply small series of innovative and fashionable goods of high quality, affordable price and eco-compatibility in short periods of time and with high service levels. As a result of these rapidly evolving challenges, companies are forming collaborative networks in order to design, develop, produce and distribute such products and services in a collaboratively way. these highly integrated and dynamic supply networks depend intensively in new set of tools, methods and related services in which rely the collaborative networking operation. this paper presents a specific case study implementation of these collaborative supporting services, through the realization of a collaborative portal.

关键词： Collaborative Networks Collaborative Portal Supply Networks

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design and implementation of a consolidated middlebox architecture 12

Design and implementation of a consolidated middlebox archit...

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proceedings of the 9th usenix conference on networked systems design and implementation

作者： Vyas Sekar Norbert Egi Sylvia Ratnasamy Michael K. Reiter Guangyu Shi Intel Labs Huawei UC Berkeley UNC Chapel Hill

Network deployments handle changing application, workload, and policy requirements via the deployment of specialized network appliances or "middleboxes". Today, however, middlebox platforms are expensive and closed systems, with little or no hooks for extensibility. Furthermore, they are acquired from independent vendors and deployed as standalone devices with little cohesiveness in how the ensemble of middleboxes is managed. As network requirements continue to grow in both scale and variety, this bottom-up approach puts middlebox deployments on a trajectory of growing device sprawl with corresponding escalation in capital and management *** address this challenge, we present CoMb, a new architecture for middlebox deployments that systematically explores opportunities for consolidation, both at the level of building individual middleboxes and in managing a network of middleboxes. this paper addresses key resource management and implementation challenges that arise in exploiting the benefits of consolidation in middlebox deployments. Using a prototype implementation in Click, we show that CoMb reduces the network provisioning cost 1.8-2.5× and reduces the load imbalance in a network by 2-25×.

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CORFU: a shared log design for flash clusters 12

CORFU: a shared log design for flash clusters

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proceedings of the 9th usenix conference on networked systems design and implementation

作者： Mahesh Balakrishnan Dahlia Malkhi Vijayan Prabhakaran Ted Wobber Michael Wei John D. Davis Microsoft Research Silicon Valley University of California San Diego

CORFU organizes a cluster of flash devices as a single, shared log that can be accessed concurrently by multiple clients over the network. the CORFU shared log makes it easy to build distributed applications that require strong consistency at high speeds, such as databases, transactional key-value stores, replicated state machines, and metadata services. CORFU can be viewed as a distributed SSD, providing advantages over conventional SSDs such as distributed wear-leveling, network locality, fault tolerance, incremental scalability and geo-distribution. A single CORFU instance can support up to 200K appends/sec, while reads scale linearly with cluster size. Importantly, CORFU is designed to work directly over network-attached flash devices, slashing cost, power consumption and latency by eliminating storage servers.

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design, implementation and evaluation of congestion control for multipath TCP 11

Design, implementation and evaluation of congestion control ...

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proceedings of the 8th usenix conference on networked systems design and implementation

作者： Damon Wischik Costin Raiciu Adam Greenhalgh Mark Handley University College London

Multipath TCP, as proposed by the IETF working group mptcp, allows a single data stream to be split across multiple paths. this has obvious benefits for reliability, and it can also lead to more efficient use of networked resources. We describe the design of a multipath congestion control algorithm, we implement it in Linux, and we evaluate it for multihomed servers, data centers and mobile clients. We show that some 'obvious' solutions for multipath congestion control can be harmful, but that our algorithm improves throughput and fairness compared to single-path TCP. Our algorithmis a drop-in replacement for TCP, and we believe it is safe to deploy.

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A semantic framework for data analysis in networked systems 11

A semantic framework for data analysis in networked systems

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proceedings of the 8th usenix conference on networked systems design and implementation

作者： Arun Viswanathan Alefiya Hussain Jelena Mirkovic Stephen Schwab John Wroclawski USC Information Sciences Institute USC Information Sciences Institute and Sparta Inc. Sparta Inc.

Effective analysis of raw data from networked systems requires bridging the semantic gap between the data and the user's high-level understanding of the system. the raw data represents facts about the system state and analysis involves identifying a set of semantically relevant behaviors, which represent "interesting" relationships between these facts. Current analysis tools, such as wireshark and splunk, restrict analysis to the low-level of individual facts and provide limited constructs to aid users in bridging the semantic gap. Our objective is to enable semantic analysis at a level closer to the user's understanding of the system or process. the key to our approach is the introduction of a logic-based formulation of high-level behavior abstractions as a sequence or a group of related facts. this allows treating behavior representations as fundamental analysis primitives, elevating analysis to a higher semantic-level of abstraction. In this paper, we propose a behavior-based semantic analysis framework which provides: (a) a formal language for modeling high-level assertions over networked systems data as behavior models, (b) an analysis engine for extracting instances of user-specified behavior models from raw data. Our approach emphasizes reuse, composibility and extensibility of abstractions. We demonstrate the effectiveness of our approach by applying it to five analyses tasks; modeling a hypothesis on traffic traces, modeling experiment behavior, modeling a security threat, modeling dynamic change and composing higher-level models. Finally, we discuss the performance of our framework in terms of behavior complexity and number of input records.

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