Replay is how Vere computes the state of a ship's Arvo instance from the event log after a ship reboots. In order to avoid replaying the entire event log, Replay takes a snapshot of the current state of the ship approximately once every ten minutes. Then when a ship reboots, Replay loads the most recent snapshot and replays events from the event log up to the most recent event.
Further Reading
- The Vere tutorial: An in-depth technical guide to Vere.