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

After purchasing the CDN service, users will be more concerned about the actual effect in the process of using it. First of all, you need to make sure that it has been activated successfully, and then follow the basic steps to add accelerated domain names and configure CNAME. After all these have been successfully completed, CDN can be used normally. Many users have a question, which is often asked, is cdn a technology?

Is cdn a technology? Cdn technology is a kind of distributed content distribution based on data network, which adopts streaming media cloud server cluster technology to overcome the lack of output bandwidth and concurrency capability of stand-alone system, increase the number of concurrent streams supported by the system, and reduce or avoid the adverse effects of single point of failure.

Cdn technology means

The main technical means to realize CDN are cache and mirror server. Can work in DNS parsing or HTTP redirection two ways, through the Cache server, or remote mirror site to complete the transmission of content and synchronous update.

The accuracy of user location judgment in DNS mode is more than 85%. In general, the ratio of the inflow of data accessed by users of each Cache server farm to the amount of data fetched from the Cache server to the original website is between 2:1 and 3:1, that is, 50% to 70% of the amount of repeated visits to the original website is shared. For mirrors, except for data synchronization traffic, the rest is done locally and does not access the original server.

Mirror site (Mirror Site) servers are often seen, which allow content to be distributed directly and are suitable for static and quasi-dynamic data synchronization. However, the cost of purchasing and maintaining the new server is high, in addition, mirror servers must be set up in each region, equipped with professional and technical personnel for management and maintenance.

While large websites update local servers at any time, the demand for bandwidth will also increase significantly, so the average Internet company will not build too many mirror servers.

Caching is low-cost and suitable for static content. Internet statistics show that more than 80% of users often visit 20% of the website's content. Under this rule, the cache server can handle most customers' static requests, while the original WWW server only needs to handle about 20% of non-cache requests and dynamic requests, thus greatly speeding up the response time of customer requests and reducing the load of the original WWW server.

The above is an introduction to cdn technology.

If there is anything else you need to know, you can find our CDN technical engineer on the official website. CDN technical engineer has more than ten years of experience in the industry, so it will be more detailed and professional than the editor's answer. Official website link www.yisu.com

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