Service virtualization in large scale, heterogeneous and distributed environment

As the increasing development of application technology and infrastructure, man v kinds of application can be wrapped to standard web service, and tasks can be partitioned and mapped to service instances according to web service architecture. In this paper we propose formalized model of virtualized service and service instance, argue about the modeling mechanism of virtualized service, and introduce the division method of service instance space based on a binary equivalence relation in order to obtain virtualized service set. After defining the concept of service virtualization, we discuss the implementation technologies from perspective of global and local instantiation process, and analyze the performance of application based on virtualized service from aspects of overhead delay, precision of service virtualization, and capability of fault-tolerant. This paper also illustrates the application of service virtualization to embody its technology concept and the perspective of application based on virtualized service.