Shulou(Shulou.com)06/03 Report--

Compared with other CDN service providers, the main advantages of CDN include stable and fast, cost-effective, easy to use, efficient and intelligent. More users will ask about the advantage of stability and speed. Generally speaking, CDN is characterized by sharing the pressure on the origin server, avoiding network congestion, accelerating the distribution of website content in different regions and different scenarios, and improving the speed of resource access. Here are some ways to accelerate CDN.

How many kinds of acceleration does cdn have? The response speed of users visiting the website is different in different regions. In order to improve the response speed of user access and optimize the flow of information in the existing Internet, it is necessary to add a middle layer CDN between the user and the server.

At present, it is a popular application scheme for large-scale websites to enable users to get the required information from the place closest to the user as quickly as possible, completely solve the network congestion and improve the response speed. According to the acceleration object, cdn is divided into client acceleration and server acceleration.

Client acceleration: Cache is deployed at the network exit to cache frequently accessed content locally, improving response speed and saving bandwidth.

Server acceleration: Cache is deployed at the front end of the server and acts as a proxy cache for the Web server to improve the performance of the Web server and accelerate access speed.

If there are multiple Cache acceleration servers and are distributed in different regions, it is necessary to manage the Cache network through effective mechanisms, guide users to access nearby (such as leading users through DNS), and globally load balance traffic, which is the basic idea of CDN content delivery network.

Cache layer technology to eliminate node device blocking caused by peak data access. Cache server has caching function, so most web objects, as well as files in other formats, within the validity period (TTL), for repeated visits, there is no need to retransfer the file entity from the original website, only through a simple authentication-to transfer tens of bytes of Header, the local copy can be sent directly to the visitor.

Because the cache server is usually deployed near the user end, the response speed of the local area network can be similar to that of the local area network, and the consumption of wide area bandwidth can be effectively reduced. It can not only improve the response speed and save bandwidth, but also effectively reduce the load of the source server and accelerate the Web server.

The virtual host of the website can enjoy Baidu's massive CDN node resources for free, rich node resources, covering the whole world, and providing acceleration services for a large number of users with unlimited traffic.

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