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Vienna, Austria
April 20, 2006 to April 22, 2006
ISBN: 0-7695-2567-9
pp: 400-407
J. Osrael , Vienna University of Technology
L. Froihofer , Vienna University of Technology
K. M. Goeschka , Vienna University of Technology
S. Beyer , Universidad Politecnica de Valencia, Spain
P. Galdamez , Universidad Politecnica de Valencia, Spain
F. Munoz , Universidad Politecnica de Valencia, Spain
ABSTRACT
<p>We present a system architecture which facilitates enhanced availability of tightly coupled distributed systems by temporarily relaxing constraint consistency.</p> <p>Three different types of consistency are distinguished in tightly coupled distributed systems - replica consistency, concurrency consistency, and constraint consistency. Constraint consistency defines the correctness of the system with respect to a set of data integrity rules (application defined predicates). Traditional systems either guarantee strong constraint consistency or no constraint consistency at all. However, a class of systems exists, where data integrity can be temporarily relaxed in order to enhance availability, i.e. constraint consistency can be traded against availability. This allows for a context- and situation-specific optimum of availability.</p> <p>This paper presents the basic concepts of the trading process and the proposed system architecture to enable a fine-grained tuning of the trade-off in tightly coupled distributed systems.</p>
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CITATION
J. Osrael, L. Froihofer, K. M. Goeschka, S. Beyer, P. Galdamez, F. Munoz, "A System Architecture for Enhanced Availability of Tightly Coupled Distributed Systems", ARES, 2006, Proceedings. The First International Conference on Availability, Reliability and Security, Proceedings. The First International Conference on Availability, Reliability and Security 2006, pp. 400-407, doi:10.1109/ARES.2006.19
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