Reliable collections
Outbox related data is stored in a reliable dictionary called outbox.
In addition to that, it also creates a reliable queue called outboxCleanup. This queue is used by the persistence to schedule cleanup for messages that have been successfully dispatched.
Configuration
The Service Fabric implementation by default keeps deduplication records for 1 hour and runs the cleanup logic every 30 seconds.
These values can be changed using:
var outbox = endpointConfiguration.EnableOutbox();
outbox.SetTimeToKeepDeduplicationData(TimeSpan.FromDays(1));
outbox.SetFrequencyToRunDeduplicationDataCleanup(TimeSpan.FromMinutes(1));