What is the principle of live CDN in the process of building the source code of live streaming apps with goods?

One 、 What is? CDN

1、CDN That's what we're talking about “ Content distribution network ”, There are countless servers as nodes on this network , Through the distribution function of this web , Make its users access the nearest node , Provide user access speed , Live with goods app The construction of the source code can fully cope with user visits from all over the country and even the world .

Two 、 Website acceleration CDN

1、 For users , If a website opens CDN, User access speed or download speed will be faster than when it is not turned on . Generally, at present, only better websites , It will open CDN function , Mainly to improve the user experience .

2、 For websites , Open the CDN It can not only improve the opening speed of the website , Enhance user experience . More importantly, turn on CDN It can reduce the broadband pressure of hacker tools and servers .

3、 Turn on CDN Post website , In the live broadcasting room, users in different regions will access different servers , And the real server of the website （ The source server ） Usually only CDN The node will access and obtain , Users across the country visit CDN Node server , Does not directly access the source server , In this way, you can bring goods on the live broadcast app Reduce the broadband resources of the website server in the construction of the source code , Reduce server stress .

4、 And once the site is up CDN Speed up , If we modify or adjust the website code , When we open the website, it will not take effect immediately , Because we are visiting CDN Content on the node , Instead of the server's own code , If you want to take effect immediately , We need to clean up CDN The cache of .

3、 ... and 、 live broadcast CDN

1、 In fact, they are bringing goods live app Live broadcast during the construction of source code CDN The principle of is similar to that of website acceleration , Both are through load balancing and multi node methods , Ensure that the video content covers a large number of viewers in the whole geographical area in a fast and reliable way , Help make the webcast live broadcast service more scalable

2、 In terms of current technology , Use CDN Its advantage is that it ensures the stability of its live broadcast on the basis of wide coverage , And improve the network transmission efficiency . current RTMMP Ordinary live broadcast with goods app The source code is being built , It's basically using CDN Principle .

In conclusion , It can be understood as publishing content information from one end to a large number of acceleration nodes all over the world , Users all over the world can use the nearest node to pull content information , Minimize pulling time , To avoid the impact of access delay caused by network congestion and distance restrictions .