基于软交换的集群媒体服务器高可用性系统建模与分析

在研究基于软交换的集群媒体服务器的系统结构基础上,提出了一个高可用性系统方案。利用广义随机Petri网理论对高可用性方案进行了建模和仿真实验。实验结果表明,该方案可以显著提高系统的可用性,是一个有效方案。基于可用性模型分析了系统修复速率、请求处理机数量、以及请求处理机故障特征对集群可用性的影响,分析结论对基于软交换的集群媒体服务器的可用性设计具有重要参考价值。

Modeling and analysis for high-availability softswitch-based clustered media server

Based on the system architecture of the softswitch-based clustered media server,a high availability system solution was proposed.Generalized stochastic Petri net theory was employed to model the solution and a lot of simu-lations had been conducted on the model.Results of simulation experiments show that the high availability system solution can improve the availability greatly and thus it is valid.The influences on the availability made by the system repair rate,the number of the request processors and the fault character of the request processor had been analyzed on the basis of the model.The analysis conclusion is important to the availability design of the softswitch-based clustered media server.