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ieee Conference on open architectures and network programming Proceedings (openarch 2003)

作者： Dharmalingam, K Collier, M Dublin City Univ Sch Elect Engn Res Inst Networks & Commun Engn Dublin 9 Ireland

ISBN: (纸本)0780377648

Replication of web content in the Internet has been found to improve service response time, performance and reliability offered by web services. When working with such distributed server systems, the location of servers with respect to client nodes is found to affect service response time perceived by clients in addition to server load conditions. This is due to the characteristics of the network path segments through which client requests get routed. Hence, a number of researchers have advocated making server selection decisions at the client-side of the network. In this paper, we present a transparent approach for clientside server selection in the Internet using Netlet services. Netlets are autonomous, nomadic mobile software components which persist and roam in the network independently, providing predefined network services. In this application, Netlet based services embedded with intelligence to support server selection are deployed by servers close to potential client communities to setup dynamic service decision points within the network. An anycast address is used to identify available distributed decision points in the network. Each service decision point transparently directs client requests to the best performing server based on its in-built intelligence supported by real-time measurements from probes sent by the Netlet to each server. It is shown that the resulting system provides a client-side server selection solution which is server-customisable, scalable and fault transparent.

关键词： Delay Electronic mail IP networks network servers Performance evaluation Probes Reliability engineering Telecommunication network reliability Web and internet services Web server

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2003 ieee Conference on open Architecture and network programming Proceedings. openarch 2003 (Cat. No.03TH8686)

2003 IEEE Conference on Open Architecture and Network Progra...

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ieee Conference on open architectures and network programming

The following topics are dealt with: open architectures and network programming; resource control in active networks; extensible datapath capabilities; endpoint adaptations; application platforms; and adaptive applica...

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Safe kernel programming in the OKE

Safe kernel programming in the OKE

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5th Annual ieee open architectures and network programming Conference (openarch 2002)

作者： Bos, H Samwel, B Leiden Univ LIAVS NL-2300 RA Leiden Netherlands

ISBN: (纸本)0780374576

This paper describes the implementation of the OKE, which allows users other than root to load native and fully optimised code in the Linux kernel. Safety is guaranteed by trust management, language customisation and a trusted compiler. By coupling trust management with the compiler, the OKE is able to vary the level of restrictions on the code running in the kernel, depending on the programmer's privileges. Static sandboxing is used as much as possible to check adherence to the security policies at compile time.

关键词： Computer operating systems

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Constructing end-to-end paths for playing media objects

Constructing end-to-end paths for playing media objects

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4th ieee Conference on open architectures and network programming (openarch)

作者： Nakao, A Peterson, L Bavier, A Princeton Univ Dept Comp Sci Princeton NJ 08544 USA

ISBN: (纸本)0780370643

This paper describes a framework for constructing network services for accessing media objects. The framework, called end-to-end media paths, provides a new approach for building multimedia applications from component pieces. Based on input from the user and resource requirements from the media object, the system first discovers the sequence of nodes (end-to-end path) that both connect the source device to the sink device and possess sufficient resources to play the object. It then configures the individual nodes along this path with the modules (path segment) that implement the service. (C) 2002 Published by Elsevier Science B.V.

关键词： Internet router QoS active network service construction adaptation

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The potential of just-in-time compilation in active networks based on network processors

The potential of just-in-time compilation in active networks...

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5th Annual ieee open architectures and network programming Conference (openarch 2002)

作者： Kind, A Pletka, R Stiller, B IBM Corp Zurich Res Lab CH-8803 Ruschlikon Switzerland

ISBN: (纸本)0780374576

Byte-code representations in active networks provide architectural neutrality and code compactness;however, the resulting execution speed is typically poor due to interpretation overhead. This paper shows that the performance of capsule-based active networks can benefit from compiling active network programs into native network processor instructions at traversed routers (just-in-time compilation). A key aspect of the paper is to demonstrate that just-in-time compilers for active networks can be fast and small enough for applicability in the datapath of network processors. The approach has been implemented based on the SNAP active network framework for the PowerNP network processor.

关键词： Program compilers

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network layer support for overlay networks

Network layer support for overlay networks

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5th Annual ieee open architectures and network programming Conference (openarch 2002)

作者： Jannotti, J MIT Cambridge MA 02139 USA

ISBN: (纸本)0780374576

Overlay networks represent a flexible and deployable approach for applications to obtain new network semantics, but they suffer from some efficiency concerns. To support overlay networks efficiently, two new primitives are proposed for implementation in the network layer. Packet Reflection allows end hosts to request short-circuit packet routing and duplication in nearby routers. Path Painting allows multiple end hosts to determine where their disparate paths to a rendezvous point meet, in order to facilitate overlay topology building. Both primitives are incrementally deployable. Numerous applications of these primitives are considered to demonstrate their utility: application level multicast systems with various semantics, an extended Resilient Overlay network with greater latency benefits, and a hierarchy of web caches.

关键词： Overlay networks

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New models and algorithms for programmable networks

New models and algorithms for programmable networks

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4th ieee Conference on open architectures and network programming (openarch)

作者： Raz, D Shavitt, Y Technion Israel Inst Technol Fac Comp Sci IL-32000 Haifa Israel Tel Aviv Univ Dept Elect Engn Syst IL-69978 Tel Aviv Israel

ISBN: (纸本)0780370643

In todays IP networks most of the network control and management tasks are performed at the end points. As a result, many important network functions cannot be optimized due to lack of sufficient support from the network. The growing need for quality guaranteed services brought on suggestions to add more computational power to the network elements. This paper studies the algorithmic power of networks whose routers are capable of performing complex tasks. It presents a new model that captures the hop-by-hop datagram forwarding mechanism deployed in todays IP networks, as well as the ability to perform complex computations in network elements as proposed in the active networks paradigm. Using our framework, we present and analyze distributed algorithms for basic problems that arise in the control and management of IP networks. These problems include: route discovery, message dissemination, multicast. topology discovery, and bottleneck detection. Our results prove that, although adding computation power to the routers increases the message delay, it shortens the completion time for many tasks, The suggested model can be used to evaluate the contribution of added features to a router, and allows the formal comparison of different proposed architectures. (C) 2002 Published by Elsevier Science B.V.

关键词： active networks distributed computing network management

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APE: Fast and secure active networking architecture for Active Packet Editing

APE: Fast and secure active networking architecture for Acti...

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5th Annual ieee open architectures and network programming Conference (openarch 2002)

作者： Takahashi, N Miyazaki, T Murooka, T NTT Network Innovation Labs. NTT Corp. Tokyo Japan

ISBN: (纸本)0780374576

This paper proposes an architecture for active network nodes, called Active Packet Editing (APE). The design of APE focuses on accelerating the functions that are essential to active network operation, such as packet classification and NAT. The twofold architecture of APE combines a software active packet processor with an efficient packet editor based on flexible hardware. Based on preset rules (pattern, action), the packet editor classifies and modifies, to a limited extent, packets that pass through the node. Upon the receipt of active packets, the software active packet processor dynamically configures the packet editor. To prevent interference among active applications, and thus ensure security, cryptographic techniques are used to distribute a flow specific key string, which is used to authenticate succeeding packets in the same flow. We are developing a prototype APE node.

关键词： network architecture

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Constructing end-to-end paths for playing media objects

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COMPUTER networkS 2002年第3期38卷 373-389页

作者： Nakao, A Peterson, L Bavier, A Princeton Univ Dept Comp Sci Princeton NJ 08544 USA

关键词： Internet router QoS active network service construction adaptation

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New models and algorithms for programmable networks

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COMPUTER networkS-THE INTERNATIONAL JOURNAL OF COMPUTER AND TELECOMMUNICATIONS networkING 2002年第3期38卷 311-326页

作者： Raz, D Shavitt, Y Technion Israel Inst Technol Fac Comp Sci IL-32000 Haifa Israel Tel Aviv Univ Dept Elect Engn Syst IL-69978 Tel Aviv Israel

关键词： active networks distributed computing network management

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