Cloud computing: a new computing paradigm

In the 21st century, the era of big data comes out as the world enters the era of data explosion. It requires a large-scale parallel processing system, just like cloud computing, to deal with the various and massive data quickly and efficiently. Cloud computing is a computing paradigm that is not only a collection of distributed computing, parallel computing and grid computing, but also suitable for handling large-scale data. This paper mainly introduces the definition, characteristics, service models and deployment models of cloud computing. Afterwards, some security challenges that cloud computing faces are presented. Finally, a brief summary and outlook of cloud computing are given.