Title: A hybrid approach to replica management in data grids

Authors: Ghalem Belalem, Yahya Slimani

Addresses: Department of Computer Science, Faculty of Sciences, University of Oran – Es Senia, BP. 1524 El M'Naouer, Oran (31000), Algeria. ' Department of Computer Science, Faculty of Sciences of Tunis, 1060 Tunis, Tunisia

Abstract: Data grids are current solutions suggested to meet the needs of large-scale systems. They provide a set of various resources which are geographically distributed. A data grid allows quick and efficient access to data, enhancement of availability, and fault tolerance. In large-scale systems, these advantages are possible only by the use of replication. The latter, however, poses the problem of the maintenance of the consistency of replicas of the same data set. In this paper, we propose a hybrid method combining the pessimistic and optimistic approaches conceived for data consistency maintenance. Our approach is based on a hierarchical representation model with two levels, which facilitates the management of replica consistency in the large-scale systems.

Keywords: data grids; replication; local consistency; global consistency; optimistic approach; pessimistic approach; replica management; data consistency maintenance; grid services; large-scale systems.

DOI: 10.1504/IJWGS.2007.012634

International Journal of Web and Grid Services, 2007 Vol.3 No.1, pp.2 - 18

Published online: 01 Mar 2007 *

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