Multiple CDN | Benefits

A multi-CDN combines the use of multiple CDNs to load-balance web traffic. Learn how it works and the differences between content delivery methods.

What is Multi CDN

A CDN (Content Delivery Network) is a system of geographically-distributed servers that facilitates the delivery of content to end-users. It does so by caching content on servers around the world, bringing content closer to end-users. Users download content from the server closest to them instead of the origin. This reduces latency and improves download speeds.

A Multi-CDN is a content delivery strategy that combines the use of multiple CDNs to create a vast network. Web traffic is then load-balanced between the CDNs to optimize availability and improve performance. Rules can also be set to route user requests to different CDNs based on business needs.

Web hosting vs Standard CDN vs Multi-CDN

Are you confused about the different content delivery methods? Here is a short glossary to clear things up.

Web Hosting
Traditional web hosting involves serving all content from one single server. This method works if your website users are based in a small region, such as your hometown.

Standard CDN
A CDN is a network of servers located around the world. Hosting your content on a CDN brings content closer to users and reduces loading time. This method benefits website and mobile applications with international users.

A multi-CDN combines the reach of multiple CDNs to create a massive network. It increases your network capacity and guarantees 100% uptime. This approach is helpful for websites and mobile applications with high traffic volumes or traffics that are sensitive to latency and outages, for instance, ecommerce and gaming sites.

How it works

Multi-CDN is a strategy that taps on several CDN providers to improve latency, uptimes and cost efficiency on a global scale. At any point in time, the CDN provider may change depending on the need or situation. The typical scenarios include a geographical location such as country or region, traffic type, and cost.

Static DNS (Domain Name System)
Modifying DNS entries is the most basic way to set up a multi-CDN. Rules can be set by pointing different hostnames to specific CDNs. For example, one CDN can be used to serve static content, and one to do images and videos. In the event of an outage, you can also use this method to reroute traffic to available CDNs.

Round Robin
In a round-robin load balancing strategy, one request is assigned to one CDN at a time, iterating through the list of CDNs circularly.

Ratio Load Balancing
In ratio load balancing, you can define different weights or ratios for each CDN according to your business needs (e.g. cost, availability, etc.) Traffic is allocated to other CDNs based on the load ratio setting.

Geographic Location
Traffic can also be assigned to different CDNs based on the user’s geographic location.

In this method, current network conditions are taken into account when determining the most optimal load-balancing approach.

How does Edgejoint works

Edgejoint is the state-of-the-art multi CDN aggregator which combines all the functionality of the CDN providers via one central control panel. The advantage of using Edgejoint is that users do not need to modify any specific CDN saving time managing each CDN independently.
With our easy-to-use Edgejoint control panel, you can choose CDN based on feature and specific location. And with AI load balancing in the mix, Edgejoint deploys CDN base on availability or latency.

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