Diversity with Off-The-Shelf Components: A Study with SQL Database Servers

By Peter Popov and Lorenzo Strigini; presented as a "fast abstract" at DSN 2003, International Conference on Dependable Systems and Networks, San Francisco, U.S.A., 2003.

ABSTRACT
Fault tolerance is often the only feasible remedy available to a user or integrator when using insufficiently dependable off-the-shelf software products. In particular, modular redundancy with diversity, as e.g. in N-version software, may be an affordable solution, but there has been little study of its practical effectiveness and implementation difficulties with off-the-shelf components. We have started an experiment to help to remedy this situation. We report preliminary observations from the development and early use of the experimental set-up.

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