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

After purchasing the CDN service, users will be more concerned about whether there is actual effect in the process of using it. First, we must first ensure whether it has been successfully opened, and then follow the basic steps to add the accelerated domain name and configure the CNAME. After these are successfully completed, we can test whether the CDN has been successfully accelerated. So how should CDN acceleration be used?

How to use cdn acceleration? Theoretically, the simplest CDN network has a DNS responsible for global Load Balancer and a Cache for each node to run.

DNS supports resolving different IPs according to the user's source IP address to achieve nearby access. In order to ensure high availability, it is necessary to monitor the traffic and health status of each node. When a single Cache of a node does not have enough load capacity, multiple caches are needed. When multiple caches work at the same time, a Load Balancer is needed to make Cache clusters work together.

When a user visits a website that joins the CDN service, the domain name resolution request will eventually be handed over to the global Load Balancer DNS for processing. Global Load Balancer DNS provides users with the address of the node closest to the user at that time through a set of predefined policies, so that users can get fast service. At the same time, it also maintains communication with all CDNC nodes distributed around the world, collects the communication status of each node, and ensures that user requests are not distributed to unavailable CDN nodes. In fact, it does global Load Balancer through DNS.

For ordinary Internet users, each CDN node is equivalent to a WEB placed around it. Through the control of global Load Balancer DNS, user requests are transparently directed to the node closest to him, and the CDN server in the node responds to user requests just like the original server of the website. Because it is closer to the user, response times are necessarily faster.

Each CDN node consists of two parts: a Load Balancer appliance and a Cache Server

Load Balancer is responsible for Load Balancer of Cache in each node to ensure the working efficiency of nodes; meanwhile, Load Balancer is also responsible for collecting information between nodes and surrounding environment, maintaining communication with global load DNS, and realizing Load Balancer of the whole system.

Cache is responsible for storing a large amount of information about client websites and responding to local user access requests like a website server close to the user.

The management system of CDN is the guarantee that the whole system can run normally. It can not only monitor every subsystem and equipment in the system in real time, but also generate corresponding alarms for various faults. It can also monitor the total flow and the flow of each node in the system in real time, and save it in the database of the system, so that the network management personnel can easily carry out further analysis. Through the perfect network management system, users can modify the system configuration.

This is an introduction to how to use cdn acceleration technology.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.