Event Replay is the process of retrieving previously recorded events and processing them again as if they were occurring for the first time. It allows systems to revisit past activity using stored event data, which can help reproduce situations, rebuild system state, test changes, or recover from failures. The original events are typically kept in an ordered record so they can be replayed when needed.
For example, if an online store experiences a system failure, its previously recorded order events can be replayed to restore inventory, payment, and shipping information. Developers can also replay events in a test environment to investigate a software problem without waiting for the issue to happen again. Event Replay is useful for recovery, troubleshooting, testing, auditing, and rebuilding application data accurately from historical activity.
