CDN Load Balancing Technology

CDN Load Balancing technology is the core of the whole CDN acceleration system, so what is the role of load balancing technology? Before introducing the CDN load balancing technology, we first understand the role and significance of CDN, only understand the meaning of CDN, it will be clear why the CDN system in the use of load balancing technology.

The meaning of CDN
In recent years, when we visit the site, often encounter the video always in the buffer, the pictures are not loaded, if it is in the past, may feel nothing, but, if it is now, people absolutely directly shut down the page, because can find the same content of the site there are many, netizens are impatient to continue to wait here. What techniques are available to effectively
Solve this situation? This technology is what we want to say: Content distribution network, also called CDN website Acceleration Service. When we are going to visit the site, the data are obtained from the source station server, but if our main server in the south, and access users in the north, then by the network bottleneck and data transmission distance, bandwidth and other factors, access speed will become very slow, data transmission instability. If the website opens CDN Acceleration Service, the CDN system will distribute its nodes all over the country, when the Netizen sends the request arrives the server, the server will assign the most reasonable CDN node to the user according to the user's region information and the surrounding network environment.

The significance of CDN load balancing technology to CDN system

Load Balancing the English name is load Balance, which means that it is allocated to multiple operating units for execution. Load balancing is built on the existing network structure, it provides a cheap and effective transparent method to expand network equipment and server bandwidth, increase throughput, enhance network data processing capacity, improve network flexibility and availability.

CDN Load Balancing technology is the core of the entire CDN system, its role is to direct a user's request to the entire CDN network distance from the user's most recent stable acceleration node, to ensure that the Internet station end users can establish a stable and efficient between the site. The accuracy and efficiency of load balancing directly determines the efficiency and performance of the entire CDN website Acceleration Service. CDN Load Balancing Technology distributes network traffic as evenly as possible to several servers or network nodes that can accomplish the same task, avoids overloading some network nodes and the disadvantage of other nodes idle, which can improve the network traffic and improve the overall performance of the network.

CDN Load Balancing Technology classification

Typically, CDN load balancing technology is divided into two tiers: global load balancing and local load balancing

1. The main purpose of the global load balancing is to direct the user's request to the nearest node throughout the network. Therefore, the main function of global load balancing is to achieve the nearest judgment. At present, the global balanced load system is generally implemented by DNS. For network systems, performing global load Balancing can initially redirect user requests to mitigate
The burden of local load balancing,

2, compared with global load balancing, local load balancing is generally limited to a certain area. Local load balancing focuses on granular load balancing based on the health of the CDN nodes, load conditions, policies, and so on. Therefore, the local load balancer device generally needs to understand the specific health status of the CDN nodes as the basis for performing local load balancing.

CDN Load Balancing Technology