Multi-CDN Decision Checklist

A one-page checklist to work through before signing a second CDN: decide whether you have a real trigger for multi-CDN (petabyte scale, contractual availability, global audience, large egress bill), pick a switching method (DNS, content steering, or client-side), blend the right measurement signals (community RUM, private RUM, player QoE, CDN logs), and protect the cache the split will dilute (origin shield, don't over-split, ramp don't dump, token parity across CDNs) — plus the one sanity check