服务级管理中的性能可用性算法研究及实现

Research on Performance-Availability Algorithms and its Implementation in Service Level Management

随着网络和网络多媒体业务的迅速增长乃至基于Web的网络服务方式的普及,客观上要求Web服务不仅能够提供快速的服务,也要满足较高的服务可靠性和可用性的要求.为了更有效地管理Web服务质量,本文提出了一种服务级管理中的性能可用性分析算法.该算法能够在对QoS的延迟、抖动、丢失率、吞吐量等参数测量的基础上,基于网络服务元素多态性和周期性轮询机制完成对Web服务的性能可用性参数的计算和预测.最后将该算法应用到一个简单的Web服务器组中进行性能参数测量并计算出具体数值.

Along with Network and Network multi-media traffic's fast growth and Web traffic's widespread, which results in that web service must provide the fast service for users and satisfies the need of service reliability and availability. To improve the quality of web service, this paper presents a performance-availability algorithm in service level management. Algorithms that base network element's more status and period polling mechanism can calculate and forecast the performance-availability parameter of web service in terms of quality of service, loss-rate and throughout and so on. Then we use this algorithm to calculate the performance parameter and achieve numerical value in a web servers group.