A Computing Mode Suitable for Medium and Small-Sized Enterprises Cloud Computing

Cloud computing is a development and integration result of distributed processing, parallel processing and grid computing technologies. It helps the enterprise switch the resources according to the applications, accesses computer and storage systems according to the demand. And it provides a new computing model for enterprise informatization. This paper introduces items realted to cloud computing: the concept, the theory, cloud level, the main form, the security analysis, as well as cloud storage.