There are 3 different modes of persistence:
This is the default. Each command is written to the journal before execution.
Writes a snapshot after every successful command. No journaling.
No journaling. Nothing is saved until Engine.CreateSnaphot() is called or if SnapshotBehavior is set to either AfterRestore or OnShutdown
var config = new EngineConfiguration();
config.PersistenceMode = PersistenceMode.SnapshotPerTransaction;
var db = Engine.For<MyModel>(config);