Cloud computing is a kind of distributed computing. It refers to decomposing huge data computing processing programs into numerous small programs through the network "cloud", and then processing and analyzing these small programs through a system composed of multiple servers to get results and return them to users. In the early days of cloud computing, simply speaking, it was a simple distributed computing, which solved the task distribution and combined the calculation results. Therefore, cloud computing is also called grid computing. With this technology, tens of thousands of data can be processed in a very short time (several seconds), so as to achieve powerful network services