The Delta plugin for backup and data recovery. Save you disk space with delta compression.
The Delta plugin is designed to analyze file differences at the block level and generate binary patches for the backup. It saves significant amounts of space on files that have few modifications between two backups.
To analyze differences between versions, the delta plugin stores signatures for each file backed up in the working directory. During restore, Bacula Enterprise Edition will restore the first version of the file, then applies patches on it for each incremental/differential backup in a temporary file.
Delta encoding is sometimes called delta compression, particularly where archival histories of changes are required.
Using the Delta plugin is a must-have when dealing with large binary files such as: