Web服务调整策略研究

Research on Web Services Adjustment Strategy

随着SOA技术的快速发展,由于分布式Web服务的不稳定性导致的服务组合失效问题逐渐成为Web服务领域的一个重要研究内容。为解决部分Web服务失效造成的组合服务失效问题,文中简要介绍了Web服务及其QoS属性指标,研究了几种常见的Web服务自适应调整方法,分析比较了典型的Web服务调整策略的优缺点。研究表明,建立服务备份集的方法能够有效地提高服务故障修复效率,同时在服务选择阶段引入评估优化机制能够大大降低服务失效率,因此,将两种方法进行有效结合将很好地提高组合服务的稳定性。

With the rapid development of SOA technology,the problem of composition service failures caused by the instability of the distributed Web Services,has become an important research content in Web Services field. In order to solve this problem,briefly introduce the Web Services and QoS attribute index,several common methods for adaption of Web Services are researched,and the advantages and disadvantages of typical Web Services adjustment strategy are analyzed and compared. Research show that the way of establishing the services backup set can effectively improve the efficiency of fault recovery,meanwhile,the evaluation and optimization mechanism is introduced in the service selection phase can greatly reduce the service failure rate. So the effective combination of the two methods will evidently improve the stability of the composite service.