Elastic Computing Service (ECS) is a simple, efficient, safe and reliable computing service with flexible processing capability. Its management mode is simpler and more efficient than physical server. Users can quickly create or publish any number of cloud servers without purchasing hardware in advance.

The industry name of cloud server is actually called computing unit. The so-called computing unit is that this server can only be regarded as a human brain, equivalent to the CPU of an ordinary computer, with limited resources. In order to get better performance, the solution is to upgrade the cloud server and deploy other software that consumes computing unit resources on the corresponding cloud service. For example, the database has a special cloud database service, and static web pages and pictures have a special file storage service.