Randy,
I've got three theories... ;)

1. Most of the data on the filesystem is changing constantly, such that
incrementals are almost as big as fulls.

2. Dump is having trouble estimating what has changed and what hasn't. 
You didn't mention what OS and filesystem you are using.

3. There are a few large files that keep changing, accounting for a
disproportionately large percentage of the incremental data, having the
same effect as #1.  Say I've got a 7.5GB filesystem with two files, one
is 10K the other is 7.4GB.  The 7.4GB file is modified, so when an
incremental is run, all 7.4GB of that file have to be backed up again,
even though only one file changed.  That is an extreme example, but may
help point you to your answer.

Cheers,
Eric

On Thu, 2003-05-15 at 09:12, Randy Pearson wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Hi All,
> 
> I've been using Amanda for quite some time (3-4 years) and have been quite 
> happy with it.  Thanks to all the developers for a great backup system.
> 
> Now for my question.  Does anybody know why level 0 and level 1 dumps of my 
> disks would be the same approximate size always?
> 
> I thought a level 1 dump supposed to be an incremental backup, while level 0 
> is a full backup.  Here are some extracts for the Amanda reports of the dumps 
> of my /home disk.  Looks to me like Amanda is backing up every file, no 
> matter what the dump level is.
> 
> In case it makes any difference, this occurred with both versions 2.4.3b2 and 
> 2.4.4.
> 
> Thanks for any advise you can give me.
> 
> Randy
> 
> May 14
> - -------
> DUMP SUMMARY:
>                                      DUMPER STATS                TAPER STATS  
> HOST  DISK             L ORIG-KB  OUT-KB COMP%  MMM:SS    KB/s  MMM:SS    KB/s
> - -------------------------------- ---------------------    
> --------------------
> zev   /home            1 7436050 4881984  65.7   43:26  1873.6   90:42   897.1
> 
> May 13
> - ------
>                                      DUMPER STATS                TAPER STATS
> HOST  DISK             L ORIG-KB  OUT-KB COMP%  MMM:SS    KB/s  MMM:SS    KB/s
> - -------------------------------- ---------------------    
> --------------------
> zev   /home            1 7436050 4881984  65.7   43:26  1873.6   90:42   897.1
> 
> May 9
> - -----
>                                      DUMPER STATS                TAPER STATS
> HOST  DISK             L ORIG-KB  OUT-KB COMP%  MMM:SS    KB/s  MMM:SS    KB/s
> - -------------------------------- ---------------------    
> --------------------
> zev   /home            0 7518580 4895872  65.1   42:29  1920.4   90:59   896.8
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