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.
|Title of host publication||Conference on Computer systems (EuroSys)|
|Publication status||Published - 1 Jan 2011|
|Event||Conference on Computer systems (EuroSys) - |
Duration: 1 Jan 2011 → …
|Conference||Conference on Computer systems (EuroSys)|
|Period||1/01/11 → …|