Backend & systems·Observability and operations
you generate one id at the edge and stamp it on every log line the request produces anywhere in the system.
Correlation ID
Also calledrequest id, trace id
A single identifier propagated through every component handling a request, so logs across services can be joined. It is the cheapest possible observability investment and the one most often retrofitted during an incident. It must survive queue hops, or the async half of the request becomes unattributable.