摘要
在以服务为中心的下一代互联网络中,Web服务常常会由于节点的动态产生和消失而导致服务的可用性受到影响,如何有效地组织广域网的Web服务从而形成可用的候选服务集合,并在服务可用度不高时有效地进行服务的复制与备份以提高服务的可用性是面向服务网络需要解决的重要问题。文章提出了一种可扩展、动态自适应的高可用性服务模型——HighServer,该模型按Web服务间的关系聚集成多个服务集合,每个服务集合采用生成树的方式组织,根据服务的可用性需求为每个服务集合确定备份服务的数量,分析证明了模型的有效性,并给出了该算法的一个实例。
The usability of Web service is often influenced since nodes have generated and disappeared dynamically in the oriented service next generation network. How to organize effective Web service of WAN to form useful candidate set of service, duplicate and backup service effectively to improve the usability of service when the usability is not high, are the important problems to be solved by oriented service network. The paper proposes a high usability service model--HigbServer, which can be expanded and dynamic self-adaptive. This model is gathered into a lot of service set according to the relation of Web service, and organizes every service set by Spanning Tree, then confirms the quantity of backup service for each service set according to the usability demanded of application, The theory analyses verily the validity of the model, and an instance of this algorithm is stated at the end of paper.
出处
《计算机工程》
EI
CAS
CSCD
北大核心
2006年第24期90-92,106,共4页
Computer Engineering
基金
国家自然科学基金资助项目(60573127)
教育部高校博士点基金资助项目(20040533036)
关键词
服务网络
可用性
WEB服务模型
服务备份
Service oriented network
Usability
Web service model
Backup service
