Houses are the necessities of our lives. In the old countryside, people used to build their own houses. With the continuous development of social civilization, in the subsequent life, people gradually found that not only the cost of building their own houses is very high, but also the labor cost and time and energy consumed in the later period are very huge, so the concept of "cloud" came into being.
Iaas are equivalent to rough houses, which are built by professional builders and sold to people in the form of commodities. How the house is used is entirely up to the purchaser to decide, and the interior decoration of the house can also be advocated by himself. As a cloud computing service product, Iaas service providers support users to access computing resources such as servers, storage, and networks. Users can use their own platforms and applications in the service provider's infrastructure.
Paas is equivalent to renting a house. The use of the house will be limited by different conditions. The decoration of the house is the responsibility of the builder, and it is more convenient to rent if it is not enough. As a cloud computing service, Paas can provide computing platform and solution services. Service providers enable users to access cloud-based environments where users can build and deliver applications.
SaaS is equivalent to hotel check-in. You only need to go through the process of "check-in with a bag". You don't have to worry about the maintenance and management of the house at all. There are different styles and prices, you can choose at will. As a software delivery model, SaaS only needs to serve users through the Internet in this delivery model, and can be used without installation.
