云计算的实现模式有哪些(云计算的三种架构是什么)

Software as a Service (SaaS), Platform as a Service (PaaS), Infrastructure as a Service (IaaS), etc.

1. Software as a Service (SaaS)

SaaS (Software-as-a-Service): Software as a Service. It is a model that provides software through the Internet. Users do not need to purchase software, but rent Web-based software from providers to manage business activities.

Application software is uniformly deployed on its own server. Enterprise file sharing users order application software services from manufacturers through the Internet based on their needs. The service provider charges based on factors such as the quantity of software ordered by the customer, the length of time, and A model for delivering software to customers through a browser.

The SaaS model greatly reduces the cost of using software, especially large-scale software, and because the software is hosted on the service provider's server, the customer's management and maintenance costs are reduced and the reliability is higher.

2. Platform as a Service (PaaS)

PaaS (Platform-as-a-Service): Platform as a Service is a service category. Provides developers with a platform to build applications and services across the global Internet. Paas provides an on-demand development environment for developing, testing and managing software applications.

PaaS actually refers to the software development platform as a service, submitted to users in the SaaS model. Therefore, PaaS is also an application of the SaaS model. However, the emergence of PaaS can accelerate the development of SaaS, especially the development speed of SaaS applications.

3. Infrastructure as a Service (IaaS)

IaaS (Infrastructure-as-a-Service): Infrastructure as a service, consumers use the Internet Services can be obtained from a comprehensive computer infrastructure. IaaS is a business model that allocates hardware resources such as data centers and infrastructure to users through the Web.

Background:

The Internet began to rise in 1960 and is mainly used for plain text emails or news collections between the military, large enterprises, etc. Group services. It was not until 1990 that it began to enter ordinary households. With the development of web sites and e-commerce, the Internet has become one of the necessities of life that people cannot live without.

The concept of cloud computing was first proposed at the Search Engine Conference in August 2006, becoming the third revolution of the Internet. Cloud computing is also becoming a strategic focus for the development of the information technology industry, and information technology companies around the world are transforming to cloud computing.

For example, every company needs to informatize data, store relevant operational data, conduct product management, personnel management, financial management, etc., and the basic equipment for these data management is the computer. For an enterprise, the computing power of a computer is far from being able to meet the data computing needs.

Then the company will purchase a computer with stronger computing power, that is, a server. For larger enterprises, the computing power of one server is obviously not enough, so the enterprise needs to purchase multiple servers, or even evolve into a data center with multiple servers, and the number of servers will directly affect this. The business processing capabilities of the data center.

In addition to the high initial construction costs, the money spent on electricity in computer operating expenses is much higher than the investment cost. Add in the maintenance expenses of the computer and network, and these total costs It is difficult for small and medium-sized enterprises to afford it, so the concept of cloud computing came into being.

Reference for the above content: Baidu Encyclopedia—Cloud Computing

According to the deployment model, cloud computing can be divided into public cloud, private cloud, hybrid cloud, community cloud and public cloud.

(1) Private cloud. Cloud resources are only available to users within an organization, which is the core feature of private cloud. There are no strict regulations on who owns the ownership, schedule management and operation of the cloud. It may be the own unit, a third-party organization, or a combination of the two. The cloud may be located within your organization or hosted elsewhere.

(2) Community cloud. Cloud resources are exclusively used by users within a few fixed units, and these units have the same demands on the cloud (such as security requirements, cloud mission, rules and regulations, compliance requirements, etc.). The owner of the cloud and the daily management operations may be one or more units within the community, or 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 developed for public use. The owner, day-to-day management, and operation of the cloud can be a commercial organization, an academic institution, a government department, or a combination of several of them. The cloud may be deployed locally or in other places. For example, the cloud of Zhongshan Citizen Public Cloud may be built in Zhongshan or Shenzhen.

1. Public cloud:

In this model, applications, resources, storage and other services are provided to users by cloud service providers. Most of the services are free, and some are pay-as-you-go. This model can only be accessed and used using the Internet. At the same time, this model is also relatively secure in terms of private information and data protection.

2. Private cloud:

This kind of cloud infrastructure is specifically designed to serve a certain enterprise, whether it is managed by itself or a third party, whether it is managed by itself or by a third party. Third-party escrow, it doesn’t matter. As long as there are no problems in the way it is used, it can bring significant help to the enterprise.

3. Community cloud:

This model is established among multiple companies with similar goals in a specific group. They share a With the establishment of infrastructure, companies seem to be moving forward together. The costs incurred are borne jointly by them, so the cost savings that can be achieved are not very large. Members of the community cloud can log in to the cloud to obtain information and use applications.

4. Hybrid cloud:

Hybrid cloud is a mixture of two or more cloud computing models, such as a mixture of public cloud and private cloud. . They are independent of each other, but combined with each other within the cloud, and can take advantage of the respective advantages of the mixed cloud computing models.

Extended information

Features

By distributing calculations over a large number of distributed computers, Instead of running on local computers or remote servers, enterprise data centers will operate more like the Internet. This enables enterprises to switch resources to needed applications and access computers and storage systems on demand.

It is like moving from the ancient single generator model to the centralized power supply model of a power plant. It means that computing power can also be circulated as a commodity, just like gas, water and electricity, which is easy to access and low-cost. The big difference is that it's transmitted over the Internet.