Review of Service Composition Approaches in Cloud Environment

Over the last decades service oriented architecture has been playing an increasingly important role in cloud computing. Services are the way of implementing service oriented architecture concept. Most of the time a single service cannot satisfy a user request, so we need to compose some services to access an appropriate composite service. The number of providers are rapidly increasing, in parallel for each request, a lot of services with the same functionality and different non-functionality features could be suggested, and it makes the problem of service composition, too complicated. However, most of traditional service composition approaches can only find composition sequence in a single cloud. Finding an optimal composition between multiple clouds will be so challenging, because it requires both service composition and optimizing cloud composition. Therefore in this paper the comparison of some state of art composition method has been presented.