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Parallel and Distributed Processing Symposium, International (2007)
Long Beach, CA, USA
Mar. 26, 2007 to Mar. 30, 2007
ISBN: 1-4244-0909-8
pp: 141
Anne Benoit , Laboratoire LIP, UMR CNRS - ENS Lyon - INRIA - UCB Lyon 5668, ?cole Normale Sup?rieure de Lyon, 46 All?e d'Italie, 69364 Lyon Cedex 07, France. E-mail: Anne.Benoit@ens-lyon.fr
Veronika Rehn , Laboratoire LIP, UMR CNRS - ENS Lyon - INRIA - UCB Lyon 5668, ?cole Normale Sup?rieure de Lyon, 46 All?e d'Italie, 69364 Lyon Cedex 07, France. E-mail: Veronika.Rehn@ens-lyon.fr
Yves Robert , Laboratoire LIP, UMR CNRS - ENS Lyon - INRIA - UCB Lyon 5668, ?cole Normale Sup?rieure de Lyon, 46 All?e d'Italie, 69364 Lyon Cedex 07, France. E-mail: Yves.Robert@ens-lyon.fr
ABSTRACT
In this paper, we discuss and compare several policies to place replicas in tree networks, subject to server capacity constraints. The client requests are known beforehand, while the number and location of the servers are to be determined. The standard approach in the literature is to enforce that all requests of a client be served by the closest server in the tree. We introduce and study two new policies. In the first policy, all requests from a given client are still processed by the same server, but this server can be located anywhere in the path from the client to the root. In the second policy, the requests of a given client can be processed by multiple servers. One major contribution of this paper is to assess the impact of these new policies on the total replication cost. Another important goal is to assess the impact of server heterogeneity, both from a theoretical and a practical perspective. In this paper, we establish several new complexity results, and provide several efficient polynomial heuristics for NP-complete instances of the problem. These heuristics are compared to an absolute lower bound provided by the formulation of the problem in terms of the solution of an integer linear program.
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CITATION
Anne Benoit, Veronika Rehn, Yves Robert, "Strategies for Replica Placement in Tree Networks", Parallel and Distributed Processing Symposium, International, vol. 00, no. , pp. 141, 2007, doi:10.1109/IPDPS.2007.370331
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