Sorry Bacula is not that clever..indeed it's just checking for files which 
changes.. It's not able to determine how the file changed, or just back up 
those bits which changed.

---Guy

Sent from my iPad

On 13 Jan 2011, at 20:44, Lawrence Strydom <qhol...@gmail.com> wrote:

> 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
> 
> 
> 
> 
> > I think what Lawrence meant was that say full backup takes 33GB, as
> > the one below.
> >
> > | 1,089 | tic FS          | 2011-01-08 02:05:03 | B    | F     |
> > 464,798 | 33,390,404,320 | T         |
> >
> > Now, if you do Incremental backup, it's going to be reported by
> > bconsole as even bigger, eg.:
> >
> > | 1,097 | tic FS          | 2011-01-09 02:05:03 | B    | I     |
> > 6,573 | 39,758,701,241 | T         |
> > | 1,105 | tic FS          | 2011-01-10 02:05:08 | B    | I     |
> > 4,585 | 39,502,153,253 | T         |
> > | 1,113 | tic FS          | 2011-01-11 02:05:02 | B    | I     |
> > 4,585 | 39,808,375,917 | T         |
> > | 1,122 | tic FS          | 2011-01-12 02:05:02 | B    | I     |
> > 4,441 | 39,939,208,908 | T         |
> > | 1,130 | tic FS          | 2011-01-13 02:05:03 | B    | I     |
> > 7,584 | 40,036,714,059 | T         |
> >
> > This is something that I don't have an answer for and I guess it's
> > somewhere within the documentation and I have missed it.  Logically to
> > me would be to show only how much Incremental backup took space, not
> > the total of the last full + incremental.
> >
> > Kind regards.
> >
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> First there's something adding data everyday, so that's why there's more and 
> more data.
> 
> You didn't tell us what kind of Incremental you do, so fileset definition 
> could help us.
> (also basic information like OS bacula version, how it was installed 
> (package, self compilation)
> 
> If you have 5.0.3 I would recommend to use Accurate option.
> 
> Each time, we see that sort of question here, an anti-virus scan touching 
> file time was the culprit. ( or same kind of silly
> script )
> 
> Check the documentation, to see how you can infuence Accurate or Incrememtal 
> to be more or less sensible to that time change.
> 
> 
> 
> --
> 
> Bruno Friedmann (irc:tigerfoot)
> Ioda-Net Sàrl www.ioda-net.ch
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> 
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