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CDN Product Description

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A CDN is a geographically distributed network of caching CDN servers that allows for faster delivery of static content and reduces the load on the main server.

User types and roles are supported in the product.

Tasks to be solved

CDN is suitable for any internet projects. CDN tasks:

  • Speed up loading of static content (images, CSS, JS, video);
  • reduce the load on the source server;
  • ensure stable operation of the site during peak loads;
  • improve the availability of content to users in different regions.

Principle of operation

At the first request for a file, the CDN-server downloads it from the content source - the main server where the content is stored, and saves the file to the cache. For subsequent requests for the same file, the CDN server retrieves the file from the cache without accessing the source.

The file is cached only on the CDN server that received the request, not on all servers on the network. If a user from another region requests the same file, the CDN server closest to the user will check the file in its cache. If it is not in the cache, the CDN server will contact an intermediate server, the shilding server.

The shilding server caches all files that are requested by CDN servers. If the shilding has the required file in its cache, it gives it to the CDN server. If the file is missing, it requests it from the content source, stores it in its cache and gives it to the CDN server.

CDN servers do not store files permanently, but cache them for a time that is set in the settings - the default is 24 hours. If a file has not been requested for a long time, it is automatically deleted from the CDN server cache. When the file is requested again, the cycle repeats.

Points of Presence

CountryCity
Russia
  • Moscow;
  • St. Petersburg;
  • Vladivostok;
  • Yekaterinburg;
  • Irkutsk;
  • Kazan;
  • Kaliningrad;
  • Krasnodar;
  • Krasnoyarsk;
  • Makhachkala;
  • Nizhny Novgorod;
  • Novosibirsk;
  • Norilsk;
  • Omsk;
  • Petropavlovsk-Kamchatsky;
  • Rostov-on-Don;
  • Samara;
  • Simferopol;
  • Stavropol;
  • Tyumen;
  • Ufa;
  • Khabarovsk;
  • Khimki;
  • Chita
ArmeniaYerevan
BelarusMinsk
GeorgiaTbilisi
Kazakhstan
  • Accol;
  • Almaty;
  • Astana;
  • Karaganda;
  • Kostanai
KyrgyzstanBishkek
MoldovaChisinau
UzbekistanTashkent

How to work with CDN

You can work with the CDN in the control panel.

Areas of responsibility

Selectel provides

  • operability of the CDN-server network;
  • access to the control panel;
  • technical support.

Selectel is not responsible for

  • for customizing the CDN resource and caching content;
  • The availability of the source server hosting your content;
  • The quality of the content you distribute through the CDN.

Cost

The cost of CDN is fixed: 500 ₽ per month for each resource in the account. For more details, please refer to the Payment Models and Pricing instructions.

What is included in the price

The monthly rate includes:

  • 100 GB of source traffic - from the source server to the CDN servers;
  • 800 GB of external traffic - from CDN servers to users.