The Design And Implementation Of Distributed Web Service Quality Measurement Platform

With the continued promotion of Web services, a large number of the same or similar Web services arise in network. As the difference of user’s geographyand network environment, the same Web service QoS may be very different to different users, so it is very important to retrieve the right Web services that meet users’needs from the same functional Web services, and we need a measurement method that be able to quickly and accurately speculated the QoS of the multiple services with the same function. This paper presents a distributed Web service QoS measurement platform, the entire network is mapped into a virtual three-dimensional coordinate system, via periodic measurement of the Web services, statistical analysis of measurement data, which speculated that the client can obtain Web service QoS.Papers starting from the study of existing Web services QoS prediction methods, comparative analysis of Web services QoS prediction technology, presents a distributed Web service quality measurement platform, the platform can accurately estimate the client Web service QoS. This article focuses on the needs and key technologies of the Distributed Web service QoS measurement platform, the design and realization of the platform, the assessment of the measurement platform and the accuracy of authentication. Web service QoS that can get from the client is determined mainly by two aspects:1, Web service which instability of the network environment and server load conditions, the Web services network coordinates will follow dynamic changes,2, the difference of the location and network environment of the users, so the estimation of the service QoS the can get from the client whenthe client calls the Web service is more difficult problem to solve. According to the problems described above, the paperproposes the demand of the ditributed Web service QoS measurement platform by the overview of Web services QoS prediction, according to the user Web service QoS characteristics to identify the key technology of the Web service QoS measurement platform, and confirm the Web service QoS attributes of the pridiction, including response time and reliability. The main contents of this paper include periodic measurements; Web service QoS measurement node, Web services and user positioning; client Web service QoS prediction. Finally, the paper has the overall architecture of distributed Web service QoS measurement platform design and implementation of the platform, and assessment according to the actual situation.