Glossary
Every term the courses use, defined in one line and then in a paragraph. Written to be read out of order.
Showing 2 of 2 matching “Idempotency”
Doing it twice has the same effect as doing it once.
A property that makes retrying safe. Usually achieved with a key the caller sends on every attempt; the server records processed keys and returns the original result instead of repeating the work. This is what prevents double charges.
See also Retry, At-least-once, Endpoint
Trying again after a failure.
Reasonable for 5xx errors and network failures, pointless for 4xx. Must be paired with increasing delays and with idempotency, or it turns a lost response into a duplicate action.
See also Idempotency, Exponential backoff, Status code