Streaming

Using multiple CDNs at once is now a common strategy for large platforms. Known as Multi-CDN , it provides resilience, global reach, and performance tuning beyond what any single provider can guarantee. This article traces the history of Multi-CDN, from early experiments with failover to modern platforms that automate real-time traffic steering across many networks. Early beginnings: redundancy and failover The first Multi-CDN setups in the early 2000s were crude but effective. Enterprises with global audiences, especially in media and finance, sometimes contracted with more than one provider. Typically, they designated a “primary” CDN and configured a “backup” to handle traffic if the main service failed. ...

Content Delivery Networks, or CDNs , are now invisible yet essential infrastructure. They accelerate websites, deliver video, block attacks, and connect billions of users to online services. Their story stretches from the late 1990s, when a few pioneering companies sold premium acceleration to media giants, to today, when free CDN tiers are available to anyone running a blog. This article traces that history, highlighting the technical and commercial shifts that shaped the CDN industry. ...

Synopsis Streaming video places separate operational demands on manifests, segments, and license services. Multi-CDN designs must account for HLS and DASH behavior, CMAF packaging, low-latency modes, cache policy, access control, session stickiness, failover, and quality-of-experience telemetry. Protocol context Most HTTP streaming uses HLS or MPEG-DASH. Both expose a manifest that references media segments. CMAF provides a common container and supports small chunks for low latency playback. The CDN caches manifests and segments and forwards misses to a packager or origin. Multi-CDN adds parallel caches and different network paths, so parity of behavior is required for correctness and quality. ...