CDN is the content distribution network, which is an intelligent virtual network based on the existing network. The principle of CDN acceleration is that the user makes a request to the CDN node for the first time, the CDN node misses and gets files from the source station. The source station responds to the request on the CDN node, while the CDN node caches the content, and the CDN node responds to the end user, When the user accesses again in the same CDN node, the CDN will directly return the cached content to the user, so that the user can get the required content nearby, reduce network congestion, and improve user access response speed and hit rate. Although the CDN acceleration function is widely used, not all Internet products are applicable. Considering the acceleration effect and operating cost, Micronet will summarize what effect CDN acceleration is generally designed to achieve.
1. Effect of static resource acceleration
As the Internet develops and iterates faster and faster, the websites we visit are becoming larger and larger. In general corporate official websites and various display websites, the server stores a large number of static resources. When more users visit our website to request static resources such as JS, CSS, pictures, etc., the high number of clicks increases the pressure on the origin site, As a result, access to the network is crowded and our website is slow. If the static resources are cached to the CDN node, users visiting the website can directly make requests to the nearby CDN node, and the CDN node will distribute the static resource files of the transfer related library to users, thus reducing the request pressure of the website's own server and improving the website's access speed and user experience.
2. Dynamic resources Acceleration effect
Today, we have more and more dynamic products with functional requirements for Internet products. Dynamic websites with strong interactivity, such as user registration, information release, product display, order management and other websites, have greatly saved the workload. There is no need for manual and automatic updates Different users visiting the same website will have different demand functions. The core server in the CDN acceleration system is combined with DNS technology to monitor changes in the network environment in real time, effectively avoid network bottlenecks and congestion, effectively avoid delays around the network, improve the stability and efficiency of data transmission between the source station and Internet end users, and ensure that various dynamic data can be transmitted to the terminal in a timely manner, Improve page loading speed and page display quality.
3. Audio/video acceleration effect
Music, live broadcast, small videos, movies, and television are full of fragmented times in our era. Most people's lives are inseparable from audio/video. High quality user experience requires that audio/video is under the pressure of millions of high concurrency at the peak of the night, presenting stable HDD image quality, and ensuring fully encrypted private signal transmission, CDN's HTTP/HTTPS audio/video on demand acceleration service provides users with stable and high-quality HTTP/HTTPS audio/video audio/video audio/visual services by quickly transmitting audio/video files to the acceleration node in a hierarchical and synchronous manner, and directing their requests to the website to the nearest node when the end user visits.
4. Image acceleration
The image sites used by ordinary people are generally material image sites, comic wallpaper image sites, image puzzle sites, online image trading platforms, etc., which provide individuals and enterprises with services such as image material search, image viewing, high-definition image download, etc., such as comic books and e-commerce platforms, where a large number of commodity images are queried and updated every day, At peak hours, tens of millions or even billions of images appear every day. The CDN system enables the network to form a good interaction with the customer's source file server, that is, the images of the source station (jpg, jpeg, png, gif, bmp and other formats), flash animations, css/js and images of various file types are cached on the node. Without the transformation of the server, the overall image traffic bandwidth can be reduced by 30% to 40%, Realize users from all over the country to quickly access and refresh website pictures in real time.
5. Accelerate Download speed
Tool type APP download is our most basic habit of using mobile phones. For software developers and software download stations, there is a rich demand for online download of green software, such as safe, green, fast, chat tools, system tools, media play, input methods, mobile phone themes and drivers, which urges software developers and software download stations to provide safe, green, fast Domestic professional download environment, CDN download acceleration creates high-speed encrypted download scenarios for users, CDN download distribution acceleration, provides stable and high-quality download acceleration for business scenarios such as installation package acquisition, mobile phone ROM upgrade, application package download, and has sudden huge traffic capacity. Through multi-layer cache convergence and resource preheating, the source site pressure is reduced, and users can obtain extremely fast download speed.
6. Achieve the effect of overseas acceleration
Cross border e-commerce, overseas games and foreign websites create global connectivity, so that cultural relics can reach all mankind in material distance. In the period of high concurrency, the physical distance makes the data transmission speed slow, resulting in poor experience for overseas users. In view of the problems of overseas operators, such as large international export investment, high business costs, imperfect infrastructure, low network stability, lack of technical personnel, poor operation capability, and the difficulty in solving the needs of a large number of users, CDN relies on the rich resources of acceleration nodes all over the world, The 500+acceleration nodes outside the mainland of China use the intelligent global scheduling system and quality real-time monitoring system developed by the underlying service provider to precisely schedule foreign user requests, and provide a variety of acceleration services and overall solutions such as foreign static foreign language websites, cross-border e-commerce photo websites, game APP downloads, audio and video. CDN can effectively reduce cross-border access delay, improve service availability, and support seamless global business sailing.
7. Acceleration effect on safety
The design and development of most website APPs in China are based on the display and stable use of ordinary users, and do not pay enough attention to the invisible security of websites. The rise of the Internet economy, due to vicious commercial competition, extortion and other reasons, since 1999, some corporate websites have been attacked by DDOS, and Yahoo was the biggest victim at that time. In recent years, DDOS attacks have become a global network security threat because of their increasingly low cost and obvious effects. Through the proxy server, the attacker sent a large number of legitimate requests to the infringed host. As a result, the greater the pressure on the database of the infringed website, the more times it was visited, which occupied a large number of system resources, resulting in a slow or inaccessible website. Because DDOS attacks are mainly targeted at IP, it is very important to hide the IP address of the source station. CDN services distribute website access traffic to each node, so that on the one hand, the real IP address of the website is hidden; on the other hand, even if encountering DDOS attacks, traffic can be distributed to each node to prevent the source station from collapsing, thus playing a defensive role and protecting the website APP.
Huawei Cloud CDN acceleration can ensure the continuity of user services and provide stable and fast network access quality through the full range CDN quality monitoring, intelligent and easy-to-use acceleration node scheduling and other functions. If you have more questions about CDN acceleration, please consult Micronet. Micronet is a provider focusing on cloud servers and CDN acceleration. With more than 10 years of industry experience, it is safe, stable, reliable and reassuring. Its technology comes from Huawei Cloud. It has successfully assisted thousands of enterprises to achieve network informatization, 7 * 24-hour manual service, and after-sales care free. It is well known in the industry.
