Database

This saves the checksums created when using the search methods File content, Similar pictures and Similar audio files in a database. For further searches, the checksums are then determined from the database instead of recalculating them over and over again. This has the advantage that the time-consuming calculation of the checksums of files that have not been changed is no longer necessary and the search therefore takes considerably less time.

The storage of the checksums can be activated for the following search methods:

File content
A separate checksum is stored in the database for each comparison method. With 5 comparison methods, up to 5 different checksums can be stored in the database per file.
Similar pictures
A separate checksum is stored in the database for each comparison method and checked picture modification. With 9 comparison methods and 7 additional checks for possible picture modifications, up to 72 different checksums can be stored in the database for each picture.
Similar audio files
A separate checksum is stored in the database for each scan length and comparison method used.

Notes:

The database is not available on Windows XP.
The database can only ever be used by one AllDup instance.

Options

Recalculate checksum if the file size was changed

The checksum of a file will be recalculated if the current file size not match with the stored file size in the database.

Recalculate checksum if the file modified date was changed

The checksum of a file will be recalculated if the current modified date of the file not match with the stored modified date in the database.

Database Tools

Cleanup

Checks the existence of all stored files in the database and removes the files not exist anymore from the database. The process can be canceled with the F10 key.

Reset

Deletes all checksums in the database.

New

Deletes the existing database file and creates a new database file.