MIRROR: A State-Conscious Concurrency Control Protocol for Replicated Real-Time Databases

Data replication can help database systems meet the stringent temporal constraints of current time-critical applications, especially Internet-based services. A prerequisite, however, is the development of high-performance concurrency control mechanisms. We present here a new CC protocol called MIRROR (Managing Isolation in Replicated Real-time Object Repositories), specifically designed for firm-deadline applications operating on replicated real-time databases. MIRROR augments the optimistic two-phase locking (O2PL) algorithm developed for non-real-time databases with a novel and easily implementable state-based conflict resolution mechanism to finetune the real-time performance. A simulation-based study of MIRROR's performance against the real-time versions of a representative set of classical protocols shows that (a) the relative performance characteristics of replica concurrency control algorithms in the real-time environment could be significantly different from their perform...

• Type: Conference
• Year: 1999
• Where: RTAS
• Authors: Ming Xiong, Krithi Ramamritham, Jayant R. Haritsa, John A. Stankovic
• Keywords: Conflict Resolution Mechanism, Embedded Systems, Mirror, Real-time, RTAS 1999