What function does Envoy serve when handling retries for failed requests?

Envoy efficiently manages retries for failed requests primarily through configurable policies, allowing users to specify the exact number of retries that should occur in case of a failure. This functionality ensures that Envoy can automatically attempt to resend requests when transient failures happen, such as network issues or timeouts. By allowing developers to define parameters for retries, it provides flexibility for optimizing application reliability and performance.

With this structured approach to handling retries, Envoy can help reduce the impact of temporary failures on user experience and service stability. Users can also configure aspects like retry intervals and which types of errors should trigger a retry, thereby tailoring the retry logic to the needs of their specific applications. This makes the correct choice clear, as it highlights the customizable nature of Envoy's retry mechanism, which is aligned with best practices in microservices and API design.