How does Multi CDN enhance redundancy and failover capabilities?

Question

A Multi CDN strategy fundamentally enhances redundancy and failover by distributing content delivery across multiple, independent Content Delivery Network (CDN) providers. This approach moves beyond the limitations of relying on a single CDN, which, as evidenced by events like the Cloudflare outage on July 2, 2019, can lead to widespread service disruptions affecting millions of websites. By employing more than one CDN, organizations create a robust safety net, ensuring that the failure or instability of one provider does not result in a complete service outage.

Accepted Answer

The critical mechanism enabling this enhanced redundancy is a Multi CDN load balancer. This specialized load balancer's primary function is to intelligently direct incoming traffic not just to different servers within a single CDN, but to entirely different CDN providers. Once traffic reaches the selected CDN, that provider's own internal load balancing system then directs the requests to its most appropriate server. This layered load balancing ensures that traffic is distributed efficiently at both the provider and server levels.

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How does Multi CDN enhance redundancy and failover capabilities?

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