Local database format
There are two databases used in Duplicati. One is for storing backup job definitions and schedules, and is used to store elements created with the UI. The other database is the local database, which is used to keep track of what files and file chunks are stored on the remote destination. There is one local database for each backup job, and the database is required for both commandline and GUI based backup tasks.
The layout of the database and the relations in the database has been documented by @mnaiman:
