If an application using an UltraLite database stops unexpectedly, the UltraLite database automatically recovers to a consistent state when the application is restarted. All committed transactions flushed to memory prior to the unexpected failure are present in the UltraLite database. All transactions not flushed at the time of the failure are rolled back.

UltraLite does not use a transaction log to perform recovery. Instead, UltraLite stores state information for every row to determine the fate of a row when recovering. See UltraLite row states.

Backups

UltraLite provides protection against system failures, but not from media failures. The best way of making a backup of an UltraLite application is to synchronize with a consolidated database. To restore an UltraLite database, start with an empty database and populate it from the consolidated database through synchronization.

In smaller UltraLite deployments, you can copy the database file to a desktop computer to provide a manual backup.

See also

• Flushing single or grouped transactions