Business-oriented Cloud Federation Service Composition Model And Optimization Method

As the rapid development and wide spread of Cloud Computing service technology, more and more enterprise cloud service resources have emerge the integration trend of application system, service resources, the data center, etc. Cloud Computing Federation is a computing mechanism which can expand the capability of enterprise cloud computing to provide the federation of enterprise cloud service resources for all users and achieve the optimal allocation. Service composition and optimization are the key technology to optimally allocate service resources within cloud federation. However, cloud federation is characterized by an open system and the complexity of enterprise business, which complexes the problem of service composition and optimization in cloud environment. Therefore, the study of cloud service composition and optimization in Cloud Federation has a great significance.Recently, the researches of Cloud Federation mainly focus on concept definition or standard specification. The enterprises have a demand on the analysis and model of cloud federation services to establish theoretical system. The existing researches of service composition are mainly specific to computing resources and Web services, which limits the direct application in the Cloud Federation service composition. Thus, this dissertation launches the investigation regarding the issues of cloud federation service composition such as enterprise cloud service definition and framework, composition model and method, and relevant examples. The main research work and achievements are as follows.(1) Propose the cloud federation service framework for enterprise information system, and discuss the key technology from six aspects such as service type, service deploy, service process, service management, service quality, and so on. Finally, the application instance of enterprise cloud service is introduced, which hopes to provide recommendations and reference for development of enterprise cloud service in enterprises.(2) Present the cloud federation service composition model based on Multi-Agent to compose optimal services in multi-Cloud platform. The model is based on the interactive collaboration of Multi-Agent in order to achieve automatic cloud services composition in the cloud complex environments according to the service requirement of the users.(3) Put forward the heuristic algorithm for enterprise cloud service composition. The cloud service in the service library is preprocessed according to the input parameters of request. And then the algorithm traverses the appropriate cloud service with heuristic function. Finally, the algorithm makes full use of service similarity and Quality of Service (QoS) to choose concrete service and program optimized in the process of regression.(4) Design the enterprise cloud service composition algorithm based on the Belief-Desire-Intention (BDI) model of Agent. And then the algorithm composed the appropriate cloud service to the service composition map with the character information of Agent. Finally, the algorithm adopted the redundancy processing method and QoS to optimize the map.(5) Implement the cloud service system model for futures enterprise, and present the key technologies in detail, including the system architecture, workflow, function modules and publishing process. And above the basis of futures enterprise demands, the model provides a great support for the practical application of the enterprise cloud federation.