Research on Multi-controller Based Cluster Streaming Cache Proxy
多控制器集群流媒体缓存代理的研究

To satisfy the requirement of large-scale streaming application with dispersive users, a novel system architecture of Multi-controller based Cluster Streaming Cache Proxy (MCSCP) is proposed. Two subsystems are introduced in this architecture: a control subsystem consists of multiple candidate cooperative controllers, and a storage subsystem is composed of content storage group. Key techniques in the control subsystem are discussed deeply: based on the graph theory, an algorithm for the selection of candidate controllers is presented; a protocol of Priority based Master controller Election and Handover (PMEH) is designed. The mathematical models are achieved to analyze the improvement in system reliability by using cooperative controllers architecture, to discuss the performance of controller election algorithm and to evaluate the relationship between the system cost and the variable of message interval. Simulation experiment is also carried out to obtain the optimal range for the value of this variable.