Distributed Web Service QoS Management Platform Framework Study

With the fast development of Internet technology, web service attracts many attentionsfrom research and web application fields.The extensive application of Web servicetechnology have made an increase in the number of web services. and the web services whichhave the same or similar function are aslo increase,As a result,when chosing the webservices,the users not only focus on the function of the web services,but also pay attention tothe quality of service(QoS),at the same time,as the different users and Internetenvironment,the quality of services of the same web services is very different.so how toevaluate and manage the QoS of service and find the best web service between the same orsimilar function web service has become a lot issue in the research fields of Web services.The paper presents a distributed Web service QoS measurement and managementplatform.which get QoS data by periodic measurement of web services,statistical analysis ofmeasurement data,which make it possible that recommend web services which demandfunction and QoS attribute requirement.Paper starting from the study of existing web services QoS prediction methods,Comparative analysis of web services QoS prediction technology and paper,presents adistributed web service quality management platform.the paper focus on the QoSmanagement and evaluation framework of web service.at the same time,QoS measurementdata may be from service provider,also services users,then different data source hasdifferent measurement methods.but existing many problems: at first, the study about datacredibility and reliability,then the data provided by services provider and services users. Atsecond,the Internet environment and unstable server load can ma ke an affect on QoS data.thethirdly,the users have different request address and internet environment,the same webservices may have different QoS data.so how to measure QoS accurately has become a focusin the field of web service study. Based on the above problems provided,the paper provided a modified web service QoSmanagement framework. Which include QoS attribute management model,QoS attributecollection or measurement model,QoS evaluation model used for by web servicePersonalized recommendation.QoS management framework has three core function modulesas follows:1. QoS attribute management modules: QoS attribute register function,QoS attribute queryfunction,the field management function of web service,QoS criterion management,QoSauthentication function.2. QoS collecting and measurement modules: QoS attribute information publishfunction,QoS information query function,user authentication management function, QoSoriginal data collection management function,QoS attribute metric managementfunction,QoS attribute updating,QoS attribute statistic and analysis function,reportfunction.3. QoS evaluation modules: web serveice register function, web service query function,webservice QoS evaluation and so on.