Hi And thanks for all the replies so far.

I'm running Bacula 5.0.3 on OpenSuSE 11.3. Self compiled with the following configure options:

 --enable-smartalloc --sbindir=/usr/local/bacula/bin --sysconfdir=/usr/local/bacula/bin -with-mysql -with-openssl -enable-bat -sysconfdir=/etc/bacula -enable-tray-monitor

Here are my job and fileset deffinitions:

###################################################################

JobDefs {
        Name = "XPclients"
        Type = Backup
        Level = Incremental
        FileSet = "XP Set"
        Schedule = "WeeklyCycle"
        Storage = File
        Messages = Standard
        Pool = File
        Priority = 10
        Reschedule On Error = yes
        Reschedule Interval = 1 hours
        Reschedule Times = 10

        Write Bootstrap = "/home/bacula/bacula/working/%c.bsr"
}

FileSet {
        Name = "XP Set"

        Include {
        Options {
        signature = MD5
        compression = GZIP
        }

        File = "C:/documents and settings"
}

########################################################################################


I understand that something is adding data and logically the backup should grow. What I don't understand is why the entire file has to be backed up if only a few bytes of data has changed. It is mainly outlook.pst files and MSSQL databse files that cuase these large backups. Some of these files are several GB.

My understanding of an incremental backup is that only changed data is backed up. It seems that at the moment my Bacula is doing differential backups, ie backing up the entire file if the timestamp has changed, even though I have configured it for incremental.

regds

Lawrence