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

Content distribution network (Content Delivery Network, referred to as CDN) is a distributed network, which is established and covered on the bearer network, and is composed of server groups of edge nodes distributed in different areas. CDN shares the pressure on the origin server, avoids network congestion, ensures that the distribution of website content is accelerated in different regions and different scenarios, and improves the speed of resource access. In the process of actually using CDN, many users will ask what is CDN back-to-origin.

What does cdn mean by Origin-pull? CDN origin-pull includes origin-pull address and accelerated domain name. Regular CDN is origin-pull. That is, when a user accesses a URL, if the parsed CDN node does not cache the content of the response, or the cache has expired, it will go back to the origin server to obtain it. If no one accesses it, then the CDN node will not take the initiative to pick it up at the origin server.

Origin-pull address: you can use either the origin-pull domain name or the origin-pull IP, which is mainly used as an address for CDN to accelerate synchronous updates of nodes.

Accelerated domain name: use a domain name that needs to be accelerated by the CDN server. Generally, the accelerated domain name will be aliased and resolved into the domain name provided by the CDN operator for CDN accelerated access.

The origin-pull domain name is generally a professional term in the field of cdn. In general, the origin-pull domain name is directly used for origin-pull. However, if the customer origin server has multiple ip and the ip address changes frequently, for cdn vendors, in order to avoid frequent configuration changes (origin-pull ip), origin-pull domain name will be used for origin-pull domain name. In this way, even if the ip of the origin server changes, the original configuration will not be affected.

CDN is supposed to speed up the website, but sometimes it will bring burden to the server because of the inappropriate back-to-origin strategy. Only by choosing the right strategy can you bring higher access efficiency to your website.

If there is anything else you don't understand, 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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