International Journal of Engineering Technology & Management Research (IJETMR)
Cloud computing is the development of parallel computing, distributed computing and grid computing. It has been one of the most hot research topics. Cloud computing distribute computation task on the resource pool which consists of massive computers, accordingly, the application systems can gain the computation strength, the storage space and software service according to its demand. Cloud computing can be viewed from two different aspects. One is about the cloud infrastructure which is the building block for the up layer cloud application.