Signals and Telemetry for Multi-CDN
Synopsis Multi-CDN routing uses real user measurements, synthetic probes, provider health, routing data, and service logs. Aggregation and alerting must turn those inputs into stable decisions, with a path change only when evidence supports it. Measurement goals All measurement should support a small set of goals. Confirm that users receive correct content with acceptable latency and reliability. Detect faults and degradations fast enough to protect users. Provide data that is stable enough for routing but sensitive enough to catch regressions. Keep the cost and complexity of the system proportional to its value. ...