Cloud Computing: Practice of Efficient Approaches, Techniques and Challenges for Data Centers

Cloud computing, a rapidly developing information technology, has aroused the concern of the whole world. Cloud computing is a virtualized pool of computing resources. It can manage a variety of different workloads, including the batch of back-end operations and user-oriented interactive applications. There are many resources available in a data center and in the cloud that a client can purchase or rent, such as processing time, network bandwidth, disk storage, and memory. The users of the cloud do not need to know where the data center is, or have any expertise on how to operate or maintain the resources in the cloud. Clients only need to know how to connect to the resources and how to use the applications needed to perform their jobs. This article introduces the background and service model of cloud computing. This article also introduces efficient approaches, techniques and challenges for data centers.