Web services performance modeling and analysis

Understanding the characteristics of Web service performance has become critical for e-business applications. For the commercial success of these e-business services, the ability to deliver QoS (Quality of Services) guarantees is crucial. One often considers the percentile of response time as the QoS metric. Today, there is no mature solution to ensure that an e-business service can be guaranteed in term of the percentile of response time. In this paper, we first present a typical Web services model and then develop a method for the calculation of the percentile response time for the Web services performance. The obtained result can be used in the design of a computing system for Web services subject to the percentile response time guarantee.