Choose the boundary that keeps an accepted request, a retry, and a cached response tied to the intended user operation. Observe the result through the client route, not only the backend process.
Review these lessons
- gRPC deadlines: spend one request budget across every downstream call
- HTTP/2 drain: let existing streams finish while new calls move away
- Load-balancer health: a green socket is not a working transaction
- Client connection pools: retire old endpoints after a DNS or rollout change
- Idempotency keys: reconcile an accepted write before repeating it
- Shadow traffic: test a new backend without duplicating live side effects
- Versioned edge assets: make long cache lifetimes safe through content identity
- Edge cache fallback: serve stale public data without leaking private responses
Other checks
Common Mistakes
- Do not repeat an ambiguous payment with a new key.
- Do not place account-specific responses in a shared cache.