Costs

Synopsis Multi-CDN cost depends on traffic forecasts, commit levels, overage exposure, and differences among regional products. Cost-aware routing, invoice reconciliation, and contract terms need a common model so that a routing decision does not create an unexpected commercial risk. Cost model foundations A simple model separates data transfer out, request charges, advanced product usage, and fixed fees. Each component varies by region and product family. The model expresses spend as a function of volume, mix, and route. Granularity by region and content type is required because prices and cache behavior differ. The model must match how providers bill so that reconciliation is possible without manual guesswork. ...

Synopsis Traffic steering converts health, performance, policy, and cost signals into routing decisions. Safe operation depends on input quality, explicit precedence, stable failover behavior, and controlled rollout. Inputs and data Effective policies need inputs that reflect user experience and provider health. Synthetic measurements provide controlled and repeatable data but can miss last mile conditions. Real user measurements capture actual paths and networks but require sampling, privacy controls, and careful aggregation. Health signals from providers are useful but should not be trusted without verification. Logs and metrics from the service stack provide the ground truth for outcomes. ...