Eventual consistency is the property that, given enough time without new updates, all replicas of a piece of data will converge to the same value. Reads may see stale or out-of-order data in the short term, but the system guarantees convergence rather than instantaneous global agreement.

Why it exists

Strong consistency (every read sees the latest write) requires coordination on every write,…

Event-Driven Architecture (EDA) is a style in which services communicate by publishing and subscribing to events on a message bus, rather than calling each other synchronously. Producers emit events when something happens; consumers react to those events independently. The pattern reduces coupling and enables fan-out, replay, and asynchronous processing.

How it works

A producer publishes an…