Cloud computing is a mode of increasing, using and delivering related services based on the Internet, which usually involves providing dynamically expandable and often virtualized resources through the Internet. Cloud is a metaphor of network and internet. In the past, cloud was often used to represent telecommunication networks, and later it was also used to represent the abstraction of the Internet and the underlying infrastructure. So cloud computing can even let you experience the computing power of 10 trillion times per second. Such a powerful computing power can simulate a nuclear explosion and predict climate change and market development trends. Users access the data center through computers, notebooks, mobile phones, etc. , and calculate according to your own needs.

Cloud computing has many definitions. What is cloud computing? There are at least 100 explanations. At present, NIST's definition is widely accepted: cloud computing is a pay-per-use model, which provides available, convenient and on-demand network access, enters a configurable computing resource pool (including network, server, storage, application software and services), and can be provided quickly with little management work or little interaction with service providers.