Term Kind Topic What it is
Fan-out on Write vs Fan-out on Read Push vs Pull Timelines concept Messaging & Queues Whether an event is copied to every recipient's store at publish time, or assembled from sources at read time - and why large systems need both.
Message Ordering concept Messaging & Queues The guarantee about the sequence in which messages are delivered — normally per-partition or per-group only, and lost the moment consumption is parallelised.
Message Queue Work Queue, Job Queue pattern Messaging & Queues A durable buffer between a producer and a worker that decouples them in time, absorbs bursts, and turns a synchronous dependency into a retryable one.