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Towards a global IP anycast service

Towards a global IP anycast service Towards a Global IP Anycast Service Hitesh Ballani Cornell University Ithaca, NY Paul Francis Cornell University Ithaca, NY hitesh@cs.cornell.edu francis@cs.cornell.edu ABSTRACT IP anycast, with its innate ability to nd nearby resources in a robust and e ƒcient fashion, has long been considered an important means of service discovery. The growth of P2P applications presents appealing new uses for IP anycast. Unfortunately, IP anycast su €ers from serious problems: it is very hard to deploy globally, it scales poorly by the number of anycast groups, and it lacks important features like load-balancing. As a result, its use is limited to a few critical infrastructure services such as DNS root servers. The primary contribution of this paper is a new IP anycast architecture, PIAS, that overcomes these problems while largely maintaining the strengths of IP anycast. PIAS makes use of a proxy overlay that advertises IP anycast addresses on behalf of group members and tunnels anycast packets to those members. The paper presents a detailed design of PIAS and evaluates its scalability and e ƒciency through simulation. We also present preliminary measurement results on anycasted DNS root servers that suggest that IP anycast provides good a ƒnity. Finally, we describe http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Towards a global IP anycast service

Association for Computing Machinery — Aug 22, 2005

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Datasource
Association for Computing Machinery
Copyright
Copyright © 2005 by ACM Inc.
ISBN
1-59593-009-4
doi
10.1145/1080091.1080127
Publisher site
See Article on Publisher Site

Abstract

Towards a Global IP Anycast Service Hitesh Ballani Cornell University Ithaca, NY Paul Francis Cornell University Ithaca, NY hitesh@cs.cornell.edu francis@cs.cornell.edu ABSTRACT IP anycast, with its innate ability to nd nearby resources in a robust and e ƒcient fashion, has long been considered an important means of service discovery. The growth of P2P applications presents appealing new uses for IP anycast. Unfortunately, IP anycast su €ers from serious problems: it is very hard to deploy globally, it scales poorly by the number of anycast groups, and it lacks important features like load-balancing. As a result, its use is limited to a few critical infrastructure services such as DNS root servers. The primary contribution of this paper is a new IP anycast architecture, PIAS, that overcomes these problems while largely maintaining the strengths of IP anycast. PIAS makes use of a proxy overlay that advertises IP anycast addresses on behalf of group members and tunnels anycast packets to those members. The paper presents a detailed design of PIAS and evaluates its scalability and e ƒciency through simulation. We also present preliminary measurement results on anycasted DNS root servers that suggest that IP anycast provides good a ƒnity. Finally, we describe

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