File-system snapshots are particularly effective for transaction storage engines that can handle their own recovery processes when restored. This is because such engines ensure data consistency and integrity during the snapshot process. Using snapshots offers the advantage of an almost zero backup window from the perspective of the application, as snapshots are typically taken very quickly and do not require long periods of downtime. While snapshots are active, there is a slight performance cost due to the overhead of maintaining the snapshot, which involves keeping track of changes made to the data after the snapshot was taken. Contrary to the claim that they don't use additional disk space, snapshots do consume disk space to store changes made after the snapshot.