Yizhou Wang
ABSTRACT
Cloud computing has emerged as a new paradigm for services delivering over the Internet. In this growing market, PaaS (Platform-as-a-Service) cloud has been an important model allowing a simple and flexible deployment of applications, without the need for dedicated networks, servers, storage and other services. Many PaaS services have been provided in the past few years and it is required to use hybrid PaaS services in order to satisfy management requirements such as legacy system integration and dynamic resource scaling. However, there are various management interfaces and different management mechanisms among PaaS clouds, which cause great difficulty and high complexity to application deployment in a hybrid cloud. In this paper, we present a runtime model based approach to using hybrid PaaS services. First, the manageability of PaaS services is abstracted as runtime models that are automatically connected with the corresponding systems. Second, we provide a unified model of PaaS services, according to the domain knowledge of current PaaS clouds. Third, the synchronization between the unified model and runtime models is ensured through model transformation. Thus, administrators are able to use hybrid PaaS services in a unified manner and management logic can be also carried out by executing programs on the unified model, which decreases the difficulty and complexity of hybrid cloud management.
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