Database
This saves the created checksums to a database when using the search methods File content, Similar pictures and Similar music. For subsequent search operations, the checksums are then retrieved from the database instead of recalculating them repeatedly. This has the advantage that the time-consuming calculation of checksums for unchanged files is omitted, and the search consequently takes considerably less time.Saving checksums can be activated for the following search methods:
- File content
For each comparison method, a separate checksum is saved in the database. With 5 comparison methods, up to 5 different checksums can thus be saved per file in the database. - Similar pictures
For each comparison method and checked picture alteration, a separate checksum is saved in the database. With 9 comparison methods and 7 additional checks for possible picture alterations, up to 72 different checksums can thus be saved per picture in the database. - Similar music
For each measurement duration and used comparison method, a separate checksum is saved in the database.
- The database cannot be used on Windows XP.
- The database can only be used by one AllDup instance.
Options
- Recalculate checksum if the file size has changed
This recalculates the checksum of a file if the file size has changed. - Recalculate checksum if the file's modification date has changed
This recalculates the checksum of a file if the file's modification date has changed.
Database Tools
- Clean up
This checks all files in the database for existence. The saved checksums for a file are deleted if the file could not be found at its storage location. The operation can be canceled with the F10 key. - Reset
This deletes all checksums in the database. - New
This deletes the database file and creates a new database file.