云计算有哪些服务模式(云计算的服务模式包括哪些)

The three service models of cloud computing: IaaS, PaaS and SaaS

IaaS: -as-a-Service (Infrastructure as a Service) is the first layer, the lowest layer, Infrastructure as a Service.

PaaS: Platform-as-a-Service (Platform as a Service) The second layer is the so-called PaaS, sometimes also called middleware. On top of IaaS, platform is a service.

SaaS: Software-as-a-Service (Software as a Service) is the third layer. At the top level, software as a service.

SaaS is the most mature and well-known type of cloud computing service. Before cloud computing really became popular, software as a service itself was already a very popular concept. Especially since 2014, HRSaaS has received capital attention and entered a period of rapid development.

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The service models of cloud computing include software as a service, infrastructure services, etc.

1. 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. . The advantage of this service model is that the service provider maintains and manages the software and provides hardware facilities for running the software. Users only need to have a terminal that can access the Internet to use the software anytime and anywhere.

2. Infrastructure services

IaaS is a business model that allocates hardware resources such as data centers and infrastructure to users through the Web. IaaS is a "cloud" infrastructure composed of multiple servers that is provided to customers as a metered service. It integrates memory, I/O devices, storage and computing capabilities into a virtual resource pool to provide the entire industry with needed storage resources and virtualized servers and other services.

Cloud computing technology:

1. Cloud computing business interface: In order to facilitate the migration of user business from traditional IT systems to cloud computing environments, cloud computing Computing should provide users with a unified business interface. The unification of business interfaces not only facilitates the migration of user services to the cloud, but also makes it easier to migrate user services between clouds.

2. Management and scheduling of virtual resources: The important feature of cloud computing that is different from stand-alone virtualization technology is that it forms a resource pool by integrating physical resources, and realizes the management of the resource pool through the resource management layer (management middleware) Scheduling of virtual resources. Cloud computing resource management needs to be responsible for resource management, task management, user management and security management.

Reference for the above content: Baidu Encyclopedia-Cloud Computing

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.

What are the three typical service models included in cloud computing:

The three service models of cloud computing are IAAS , PAAS and SAAS. The role of IaaS is to provide off-site servers, storage and network hardware. Users only need to rent them, which greatly saves maintenance costs and office space. The function of this layer is to provide virtual machines or other resources as services to users.

Characteristics of cloud computing service models

In order to save users on hardware costs, PaaS companies make it easier to collaborate among dispersed studios , providing various solutions related to developing and distributing applications, such as virtual servers and operating systems. The main function of this layer is to provide the development platform as a service to users.

SaaS software as a service. The third layer is SaaS. This is the layer that everyone comes into contact with the most, and is generally accessed through a web browser. Any application on a remote server can be run as long as it is connected through the network, without the need for tedious operations such as installation, eliminating some expensive investment in software and hardware. This is SaaS. The role of this layer is to provide the application as a service to users.