What is cloud computing?

Cloud Computing (Cloud Computing) is the increase, use and interaction model of Internet-based related services, usually involving provision through the Internet Dynamic, easily scalable and often virtualized resources. Cloud is a metaphor for network and Internet. In the past, cloud was often used to represent telecommunications networks in diagrams, and later it was also used to represent the abstraction of the Internet and underlying infrastructure. Therefore, cloud computing can even allow you to experience 10 trillion calculations per second. With such powerful computing power, you can simulate nuclear explosions, predict climate change and market development trends. Users access the data center through computers, laptops, mobile phones, etc., and perform calculations according to their own needs.

There are many definitions of cloud computing. There are at least 100 explanations for what exactly cloud computing is. What is widely accepted at this stage is the National Institute of Standards and Technology (NIST) definition: Cloud computing is a pay-per-use model that provides available, convenient, on-demand Network access, into a shared pool of configurable computing resources (resources include networks, servers, storage, application software, services) that can be quickly provisioned with minimal management effort or minimal interaction with service providers interaction. In layman's terms, cloud computing is computing through a large number of computing resources in the cloud. For example, users send instructions to a service provider that provides cloud computing through their own computers, and perform "nuclear explosion" calculations through a large number of servers provided by the service provider. The results are then returned to the user.

Generally speaking, cloud platform developers need distributed system architecture design, and cloud application developers also need to understand the underlying operating principles of the cloud, such as how to split tasks and data, and use a Only by setting up a distributed system to complete the collaborative work, how to schedule resources, and how to ensure data consistency can we better design applications. Of course, before that, you first need to understand the basic knowledge of operating system, network,database and so on.

The rapid development of cloud platforms and cloud applications is inseparable from the vigorous development of

open source technology. Different open source technologies solve different problems, and you also need to understand different Programming languages, such as OpenStack needs to learnPython, Kubernetes and Docker need to learn Go. Of course, the greater significance of open source technology is to solve problems, so that there is no threshold from 0 to 1. Its application in the production environment requires a lot of optimization, so performance, stability, high availability, data reliability, operability, etc. , all require special consideration. Of course, this requires detailed analysis of specific issues. NetEase Cloud believes that future Internet business-oriented applications will all be cloud native applications, but cloud native applications at different stages have different core design requirements.

Cloud computing is a big concept that involves many technical and even economic factors. If you want to "learn" cloud computing, it is undoubtedly very wise to first understand what technologies you need to learn for cloud computing. But simply understanding is not enough. True immersive learning is the foundation for a solid grasp.

Cloud computing is a technology. Cloud computing in the narrow sense refers to the delivery and usage model of IT infrastructure, which refers to obtaining the required resources through the network in an on-demand and easily scalable manner; Broadly defined cloud computing refers to the service delivery and usage model, which refers to obtaining the required services through the network in an on-demand and easily scalable manner. This kind of service can be related to IT, software, Internet, or any other service. It has unique functions such as ultra-large scale, virtualization, reliability and security. There are also many versions of "cloud computing" books, all of which are based on theory and practice. Introduced the characteristics and functions of cloud computing.

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