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Preguiça, N., R. Rodrigues, C. Honorato, and J. M. Lourenço, "Byzantium: Byzantine-fault-tolerant database replication providing snapshot isolation", Proceedings of the Fourth conference on Hot topics in system dependability, Berkeley, CA, USA, USENIX Association, pp. 9–9, 2008. Abstractbyzantium-hotdep.pdf

Database systems are a key component behind many of today's computer systems. As a consequence, it is crucial that database systems provide correct and continuous service despite unpredictable circumstances, such as software bugs or attacks. This paper presents the design of Byzantium, a Byzantine fault-tolerant database replication middleware that provides snapshot isolation (SI) semantics. SI is very popular because it allows increased concurrency when compared to serializability, while providing similar behavior for typical workloads. Thus, Byzantium improves on existing proposals by allowing increased concurrency and not relying on any centralized component. Our middleware can be used with off-the-shelf database systems and it is built on top of an existing BFT library.

Silva, J., J. M. Lourenço, and H. Paulino, "Boosting Locality in Multi-version Partial Data Replication", Proceedings of the 30th ACM/SIGAPP Symposium On Applied Computing (SAC'15), 2015. Abstractsac15_cache.pdf