What are the three levels of cloud computing architecture?

The cloud computing architecture is divided into three levels: infrastructure layer, platform layer and software service layer. The purpose of cloud computing is to organize and integrate shared software or hardware resources and information through network-based computing methods. Provided to computers or other systems on demand.

#The operating environment of this article: Windows 7 system, Dell G3 computer.

Detailed introduction:

Cloud computing is the product of the development and integration of traditional computer and network technologies such as grid computing, distributed computing, parallel computing, utility technology, network storage, virtualization and load balancing. . Its purpose is to organize and integrate shared software/hardware resources and information through network-based computing methods, and provide them to computers and other systems on demand.

Generally speaking, the generally accepted cloud architecture is divided into three levels: infrastructure layer, platform layer and software service layer. The corresponding names are IaaS, PaaS and SaaS. IaaS, Infrastructure as a Service, the Chinese name is Infrastructure as a Service.

IaaS mainly includes computer servers, communication equipment, storage equipment, etc. IT infrastructure services such as computing power, storage capacity or network capabilities that can be provided to users on demand, that is, can be provided at the infrastructure level Serve. The core of the mature application of IaaS lies in virtualization technology. Through virtualization technology, various computing devices can be uniformly virtualized into computing resources in a virtual resource pool, storage devices can be uniformly virtualized into storage resources in a virtual resource pool, and the network can be unified. The devices are unified and virtualized into network resources in the virtual resource pool. When users order these resources, the data center manager directly packages the ordered shares to the users, thus realizing IaaS.

PaaS, Platform as a Service, the Chinese name is Platform as a Service. If viewed from the perspective of "hardware operating system/development tools application software" in traditional computer architecture, then the platform layer of cloud computing should provide functions similar to operating systems and development tools. In fact, this is indeed the case. PaaS is positioned to provide users with a complete set of support platforms for developing, running and operating application software through the Internet. Just like in the personal computer software development model, programmers may use development tools to develop and deploy application software on a computer equipped with a Windows or Linux operating system. Microsoft's Windows Azure and Google's GAE can be regarded as the two most well-known products in the PaaS platform.

SaaS, software as a service. Simply put, it is a software application model that provides software services through the Internet. In this model, users no longer need to spend a lot of investment in building hardware, software and development teams. They only need to pay a certain rental fee to enjoy corresponding services through the Internet, and the entire system is maintained by the manufacturer. Responsible.

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