The Software as a Service (SaaS) model of cloud computing is becoming the trend of the new generation of software development due to its low investment, flexibility, and accessibility. Nowadays there are many well used conventional software applications, especially client-server applications. Reuse these application in cloud platforms will benefit both enterprises and the customers. This paper proposes a service framework for easily deploying conventional client-server applications to cloud running as SaaS. The service framework consists of four services: tenant awareness services, tenant management service, application auto-deployment service, and cloud resources management service. The proposed service framework has been implemented and verified on the Amazon AWS cloud engine.
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