摘要
Cloud computing refers to the provision of computational resources on demand via a computer network. It is considered to be the third IT revolution following personal computer revolution and the Internet revolution. IAAS, a kind of service provided by cloud computing, can supply users with the convenience and flexibility of virtual resources to achieve the same power supply as the water supply. Though there are kinds of existing IAAS solutions, but they are all common system architecture design, without taking into account the characteristics of applications resulting in inefficient service provision. In this paper, by referencing service-oriented philosophy IAAS platform is reconstructed. Based on loosely coupled physical resources by virtualization technology, a policy-based management system is provided to optimize service monitoring and service scheduling. Prototype implement show that it will effectively improve the performance of service running on IAAS.