Talks and Poster Presentations (with Proceedings-Entry):
J. Osrael, L. Froihofer, K. Göschka, S. Beyer, P. Galdamez, F. Munoz-Escoí:
"A System Architecture for Enhanced Availability of Tightly coupled Distibuted Systems";
Talk: ARES 2006 Proceedings,
- 2006-04-22; in: "Proceedings of the First International Conference on Availability, Reliability and Security",
IEEE Computer Society,
We present a system architecture which facilitates enhanced availability of thightly coupled distributed systems by temporarily relaxing constraaint consistency.
Three different types of consistency are distinguished in tightlycoupled 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 system 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.
This paper presents the basic concepts of the trading process and the proposed system architecture to enable a fine-grained tunign of the trade-off in tightly coupled distributed systems.
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
Created from the Publication Database of the Vienna University of Technology.