Origin Architecture for Multi-CDN
Synopsis An origin that serves multiple CDNs must tolerate their combined fetch patterns and different failure behavior. Topology, shielding, authentication, cache keys, deployment order, and failover controls determine whether content remains correct when traffic moves. Role of the origin in multi-CDN The origin is the source of truth for content and APIs. In a multi-CDN setup more than one provider will fetch from it. The design must handle higher fan in, different retry behaviors, and different cache semantics without breaking correctness. It should also keep the number of variables low so that problems are diagnosable during incidents. ...