Cloud Computing Tutorial: Deployment Models and Cloud Services

At present, the traditional computing equipment in the world far exceeds the computing equipment in the cloud. Because these traditional computing equipment are not shared, a lot of computing capacity is wasted in vain. Cloud computing is considered to be "green" computing when the computing devices added to the cloud are fully used. However, in several cloud computing centers led by the Chinese government, the utilization rate of computing devices is very low, with many machines and huge power consumption. This simply runs counter to "green" computing.

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Through cloud computing, providers convert computing resources into service products and sell them to users. Service products are different from other tangible products (such as air conditioners, tables, beer, books, etc.), so someone has proposed the fourth service of cloud computing Mode-DaaS (data as a service, which is the top layer of the rental IT system).

The following explains the knowledge points of cloud computing deployment models and services:

4 deployment models for cloud computing

1. Private cloud

Cloud resources are only available to users within an organization, which is the core feature of private clouds. There is no strict regulation on who owns the ownership, daily management and operation of the cloud. It may be the unit, a third-party organization, or a combination of the two. The cloud may be located inside the unit, or it may be elsewhere.

2. Community Cloud

Cloud resources are specifically used by users in a fixed number of units, and these units have the same demands on the cloud (such as security requirements, cloud missions, regulations, compliance requirements, etc.) The main body of ownership, daily management and operation of the cloud may be one or more units within the community, it may also be a third-party organization outside the community, or a combination of the two. The cloud may be deployed locally or elsewhere.

3. Public Cloud

Cloud resources are open to the public. The main body of ownership, daily management and operation of the cloud can be a commercial organization, academic institution, government department or several of them. The cloud may be deployed locally or elsewhere, such as the public cloud of Zhongshan citizens may be built in Zhongshan or Shenzhen.

4. Hybrid Cloud

Hybrid cloud consists of two or more different types of clouds (private cloud, community cloud, public cloud), they are independent, but they are combined using standard or proprietary technologies, and these technologies can achieve cloud Smooth flow of data and applications. The combination of multiple clouds of the same type belongs to the category of multi-cloud.

For example, two private clouds are combined together, and a hybrid cloud is a type of multi-cloud. The hybrid cloud composed of private cloud and public cloud is currently the most popular-when the transient demand of private cloud resources is too large (called cloud bursting), the public cloud resources are automatically leased to smooth the peak demand for private cloud resources .

3 services of cloud computing

1. Software as a Service (SaaS)

The cloud service provider rents out the application software layer in the IT system as a service, and consumers can directly use the application software without installing the application software. This further reduces the technical threshold for cloud service consumers.

2. Platform as a Service (PaaS)

The cloud service provider rents out the platform software layer in the IT system as a service, and the consumer develops or installs the program by himself, and runs the program. For a more detailed introduction, see the subsequent chapters.

3. Infrastructure as a Service (IaaS)

The cloud service provider rents out the infrastructure layer of the IT system as a service, and the consumer installs the operating system, middleware, database, and application program.
The essence of cloud computing is to transform tangible products (network devices, servers, storage devices, various software, etc.) into service products, and let people use them online remotely through the network to separate the ownership and use rights of products. Finally, I recommend you a cloud computing learning website as the end. I hope everyone can systematically learn cloud computing tutorials.