PERFORMANCE EVALUATION OF M-PDDRA ALGORITHM UNDER PRIORITIZED TRAFFIC

Abstract

Database replication is a process, which keeps the multiple copies of the same data at a different geographical location, thus allowing data security and reduces load and access delay. In the recent past PDDRA, a pre-fetching based dynamic data replication algorithm was proposed and later on further modifications are done to increase throughput and reduce latency. In previous work, the performance of the algorithms is measured for random traffic arrival process for both local and global network. The performance is also evaluated under load balancing condition. However, an important feature in request generation is a priority of the request, which needs to be addressed. This work considers the priority of generated requests in request loss analysis, and thus it lifts the assumption of the previous algorithm which assumes that member of the virtual organization has similar interest. The performance evaluation of the algorithm is performed using Monte-Carlo simulation.

Keywords

• Database replication
• M-PDDRA
• PDDRA
• Priority