Systems, methods, and other embodiments associated with event recording are described. One example method includes locally locking a record in an event data store corresponding to an event having a same event type as a given event when a prior occurrence of the given event has not yet been recorded. The event data store is updated to record the given event while the record is locked. One example system includes an event data store configured to store records corresponding to events, an event recorder configured to record event data in the event data store and a local lock actuable by the event recorder. The event recorder is configured to update the locked record to correspond to a received event.