3.11. File Deduplication using Base Jobs¶
modified will then be excluded from the backup. During a restore, the Base jobs will be automatically pulled in where necessary.
Imagine having 100 nearly identical Windows or Linux machine containing the OS and user files. Now for the OS part, a Base job will be backed up once, and rather than making 100 copies of the OS, there will be only one. If one or more of the systems have some files updated, no problem, they will be automatically backuped.
A new Job directive Base=JobX,JobY,… permits to specify the list of files that will be used during Full backup as base.
- Job {
- Name = BackupLinux Level= Base …
}
- Job {
- Name = BackupZog4 Base = BackupZog4, BackupLinux Accurate = yes …
}
In this example, the job BackupZog4 will use the most recent version of all files contained in BackupZog4 and BackupLinux jobs. Base jobs should have run with Level=Base to be used.
By default, Bareos will compare permissions bits, user and group fields, modification time, size and the checksum of the file to choose between the current backup and the BaseJob file list. You can change this behavior with the BaseJob FileSet option. This option works like the Verify, that is described in the FileSet chapter.
- FileSet {
Name = Full Include = {
- Options {
- BaseJob = pmugcs5 Accurate = mcs Verify = pin5
} File = /
}
}
Warning
- The current implementation doesn’t permit to scan
- volume with command{bscan. The result wouldn’t permit to restore files easily.}