Cloud Academy Takes You to Learn Cloud Computing from Basic

In this article, I will lead you to learn cloud computing basically and give you a brief introduction to IaaS, PaaS, SaaS, including the division and introduction of cloud computing.

If you want to get more cloud computing courses, please refer to Alibaba Cloud Academy. You can lean cloud computing and  big data online.

When it comes to understanding IaaS, PaaS, SaaS, start with their positioning in the cloud.
By application category, there are simulation cloud, game cloud, video cloud, etc. By industry, there are government cloud, police cloud, education cloud, etc., such as government cloud, mainly serving government departments. According to usage scenarios, there are private cloud, public cloud and hybrid cloud. The private cloud is self-built and self-used; the public cloud is built by the supplier, and the customer purchases the above services; the hybrid cloud is to have its own private cloud and also purchase a part of the public cloud service, and then the private cloud and the public cloud are connected through the network, and at the same time Use public and private clouds. According to the service level, there are IaaS, PaaS, SaaS. IaaS is an infrastructure platform as a service, PaaS is a platform as a service, and SaaS is a software as a service. How to understand? At the IaaS level, we buy cloud hosts, cloud hard drives, networks, etc., which are basic services, and then we also deploy operating systems and applications on it; to PaaS, we buy platforms, for example, at the IaaS level, we need to deploy A database requires a database of software, which is then deployed in the cloud host, but in PaaS, you are directly given a database, you do not need to purchase the software, the direct purchase is a database; the third is SaaS software and services, we You can use the software directly by purchasing the software directly without considering the type of the underlying cloud host or the type of its database.

We can understand through an example that there are several ways to eat Pizza.

The first one is to buy noodles and ingredients by yourself, go to home and put the configured pizza in the oven to bake, and then take it out to the table to eat. At this time, you need to have an oven, dining table, tableware-this It is IaaS, which requires an operating system and an application. The second is to buy a pizza and eat it back. At this time, you only need to prepare the table and tableware-this is PaaS, as long as you need to prepare the application. The third is to go directly to the store to eat, regardless of the bread and oven used, there is no need to worry about the table and tableware-this is SaaS, buy the application directly. The basic understanding of cloud computing introductory knowledge is introduced here. Have you already had a clearer understanding of IaaS, PaaS, and SaaS? If you want to know more about cloud computing, please log in to Alibaba Cloud Academy.