Reliability

Words

All learned. See them in History.

• Circuit breaker

  A wrapper around calls to another service that counts failures and, past a threshold, stops calling it for a while and fails fast instead (open).

• Graceful degradation

  Designing a service so that when a dependency fails, its core job keeps working and only the extras are dropped or simplified.

• Rate limiting

  Capping how many requests each client may make in a period and refusing the rest, usually with HTTP 429 Too Many Requests.