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Analysis of data replication with two levels of consistency

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2 Author(s)
Misra, M. ; Dept. of Comput. Sci., Newcastle upon Tyne Univ., UK ; Mitrani, I.

A system employing data replication is structured as a two-level logical hierarchy. Replicas at level 0 maintain strong consistency, while those at level 1 may contain out-of-date information. Accesses which change the data have to be executed at level 0, and require an appropriate quorum of replicas. Read requests may be executed either at level 0 or at level 1, depending on whether the most recent information is required or not. A read quorum is necessary in the former case, but not in the latter. The performance and reliability characteristics of the system are evaluated by means of two models-one with reliable servers and one with random breakdowns and repairs. Much of the analysis is exact, but there are also some approximations

Published in:

Computer Performance and Dependability Symposium, 1996., Proceedings of IEEE International

Date of Conference:

4-6 Sep 1996