Shulou(Shulou.com)06/01 Report--

Content distribution network. The basic idea is to avoid the bottlenecks and links that may affect the speed and stability of data transmission on the Internet, so as to make the content transmission faster and more stable. By placing node servers everywhere in the network to form a layer of intelligent virtual network based on the existing Internet, the CDN system can redirect the user's request to the nearest service node in real time according to the comprehensive information such as network traffic, connection of each node, load status, distance to the user and response time. The purpose is to enable users to access the content they need nearby, solve the congestion problem of Internet network, and improve the response speed of users visiting the site.

Now many people will ask if your network has CDN and whether it can be accelerated by CDN. CDN is an essential part of most Internet businesses, but most Internet practitioners are not very clear about what CDN is and what it can do for us. With these questions in mind, we first need to understand the basic meaning of CDN.

1. What is CDN technology (what)

In fact, CDN is Content Delivery Network. Through a way of cache redundancy, it adds a new network architecture to the existing network structure, which stores part or all of the content of the website in the nearest network server of the user, so that the user can get the content of the website nearby.

At present, large websites have adopted the technical solution of CND.

CDN is not used. User access process:

Using CDN, the user access process:

2. Why use CDN (why)

In today's world, for everyone, the website must have everything: it must be attractive, fast, flexible and mobile, and even be able to change constantly. In addition, it must support frequent sessions, browsers, smartphones, tablets, and other devices that users may use. The website must be able to run in a complex network environment, geographically dispersed, distant and diverse, the site uses more and more objects, the system will change more and more slowly, and users can only visit some of the fastest open and best-performing websites. If your site slows down every second, it may lead to the loss of many visitors, and even some customer users will not come back.

So CDN came into being at this time, they can help users to improve the website browsing performance, but also to improve the fluency of the game, the financial industry and even the banking industry transaction accuracy and liquidity.

3. How to use CDN (how)

There are generally two ways to use CDN: mirror server and cache. Mirror server means that the website itself sets up mirror cache servers in various places, which can handle some dynamic data caching at the same time, but because of the high maintenance costs and bandwidth costs, and even need to add architecture adjustment costs, so general websites will not set up mirror servers.

The cost of caching is much lower and is suitable for caching static content. Generally, CDN services are provided by IDC companies, which are relatively simple to implement. Most companies use the way of renting CDN services. The editor uses ground access CDN service here, which can solve your worries to a certain extent.

It is relatively simple to implement: simply provide the resolution right of the domain name to the CDN operator (ground access), change the A record of www to the CNAME record, and point to the operator's CDN cache address.

If there is anything else you need to know, you can find our CDN technical engineer on the official website. CDN technical engineer has more than ten years of experience in the industry, so it will be more detailed and professional than the editor's answer. Official website link www.yisu.com

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