retentionPeriod

The retention period of the event data store, in days. If BillingMode is set to EXTENDABLE_RETENTION_PRICING, you can set a retention period of up to 3653 days, the equivalent of 10 years. If BillingMode is set to FIXED_RETENTION_PRICING, you can set a retention period of up to 2557 days, the equivalent of seven years.

CloudTrail Lake determines whether to retain an event by checking if the eventTime of the event is within the specified retention period. For example, if you set a retention period of 90 days, CloudTrail will remove events when the eventTime is older than 90 days.

If you plan to copy trail events to this event data store, we recommend that you consider both the age of the events that you want to copy as well as how long you want to keep the copied events in your event data store. For example, if you copy trail events that are 5 years old and specify a retention period of 7 years, the event data store will retain those events for two years.