QoS感知的高效抽象服务选择  

QoS-aware Efficient Abstract Service Selection

作　　者：欧伟杰[1] 曾承[1,2] 曾青[1] 彭智勇[3] 王珍珍[1] 刘波[1] 马景燕[1] 

机构地区：[1]软件工程国家重点实验室,武汉430072 [2]清华大学软件学院,北京100084 [3]武汉大学计算机学院,武汉430072

出　　处：《小型微型计算机系统》2013年第1期1-8,共8页Journal of Chinese Computer Systems

基　　金：国家"九七三"重点基础研究发展计划项目(2007CB310806)资助;高等学校学科创新引智计划项目(B07037)资助

摘　　要：云计算的蓬勃发展为Web服务带来了新的机遇和挑战.一方面是用户日益增长的服务需求,另一方面是互联网上大量功能相似、质量各异的具体服务,如何合理利用这些服务来满足大规模的用户需求成为一个亟待解决的问题.传统服务组合技术侧重于服务功能的扩展,并未考虑服务的非功能属性提升.本文根据抽象服务的概念,提出平衡遍历方法聚合具有相似功能的具体服务提升整体性能.这不仅满足了用户的规模化需求,而且提高了具体服务的利用率.此外,本文还针对服务的多维非功能属性,提出可扩展的skyline抽象服务选择算法,并通过一系列实验验证了所提出方法的有效性和可扩展性.The rapid development of the Cloud computing has brought Web service opportunities and challenges.On the one hand,the demand for service is growing quickly.On the other hand,there are lots of services which have same function but with different quality.It′s significant challenge to make use of these services to meet user needs.Traditional service composition extends the function of service,but it could not improve the non-function properties.According to the concept of Abstract service,this paper presents an approach to aggregate concrete services with similar functions to enhance total QoS.This approach not only meets users′ demand for large-scale,but also improves the utilization rate of service.Meanwhile,skyline based Abstract service selection algorithm is proposed,which is suitable for multi-dimensional non-function properties of service.The result of extensive experiments is reported to verify its efficiency and scalability.

关 键 词：服务质量 抽象服务 服务选择 SKYLINE 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]