Efficient middleware for byzantine fault tolerant database replication

Nuno Manuel Ribeiro Preguiça

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

31 Citations (Scopus)


Byzantine fault tolerance (BFT) enhances the reliability and availability of replicated systems subject to software bugs, malicious attacks, or other unexpected events. This paper presents Byzantium, a BFT database replication middleware that provides snapshot isolation semantics. It is the first BFT database system that allows for concurrent transaction exe- cution without relying on a centralized component, which is essential for having both performance and robustness. Byzantium builds on an existing BFT library but extends it with a set of techniques for increasing concurrency in the execution of operations, for optimistically executing opera- tions in a single replica, and for striping and load-balancing read operations across replicas. Experimental results show that our replication protocols introduce only a modest per- formance overhead for read-write dominated workloads and perform better than a non-replicated database system for read-only workloads.
Original languageUnknown
Title of host publicationConference on Computer systems (EuroSys)
Publication statusPublished - 1 Jan 2011
EventConference on Computer systems (EuroSys) -
Duration: 1 Jan 2011 → …


ConferenceConference on Computer systems (EuroSys)
Period1/01/11 → …

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