A Overview on Cloud Computing Platforms and Issues

Cloud computing is the improvement of parallel computing, distributed computing and grid computing. It has been one of the most hot research topics. Currently many corporations have involved in the cloud computing related techniques and many cloud computing platforms have been put forward. But there are also some complications for so many platforms. The characteristics, architectures and applications of several popular cloud computing platforms are analyzed and discussed in detail in this paper. From the comparison of these platforms, users can better understand the different cloud platforms. Keyword: virtualization; utility computing; IaaS; PaaS; SaaS;IDass;Naas;