Mike,

> Backup#         Type    Comp Level      Size/MB         Comp/MB         Comp  
>   Size/MB         Comp/MB         Comp
> 0       full    3       78446.6         45871.8         41.5%   258032.2      
>   155715.6        39.7%
> 2       incr    3       276482.0        165123.8        40.3%   143.0   70.3  
>   50.8%

Notice that the first full is 78GB, but the incr is 276GB.

I would guess you added shares, directories or changed excludes after the
full, but before the incremental.  Or a large amount of data was added
between these two backups.

> 3       incr    3       900.7   530.7   41.1%   964.7   469.5   51.3%
> 4       incr    3       113.5   2.7     97.6%   218.0   30.8    85.9%
> 5       incr    3       73.4    6.1     91.7%   194.8   32.2    83.5%
> 6       incr    3       304.3   172.2   43.4%   1735.9  944.0   45.6%
> 7       incr    3       275955.3        165019.1        40.2%   1337.0  658.0 
>   50.8%
> 8       incr    3       520.4   249.4   52.1%   672.7   282.5   58.0%
> 9       incr    3       502.9   243.5   51.6%   587.6   264.1   55.1%
> 10      incr    3       116.8   3.7     96.8%   201.5   24.3    88.0%
> 11      incr    3       14.0    3.0     78.7%   244.3   32.8    86.6%
> 12      incr    3       127.1   5.3     95.9%   82.2    22.3    72.8%
> 13      incr    3       276989.9        165643.4        40.2%   329.3   40.7  
>   87.7%
> 14      incr    3       275957.9        165146.0        40.2%   1503.5  615.1 
>   59.1%
> 
> My question is, why did backups 13 and 14 backup all that data?  Same
> with 2 and 7 for that matter.
> 
> Here's the times for the first few backups to give you an idea of the
> time it's taking:
> 
> Backup#          Type    Filled          Level           Start Date      
> Duration/mins
> Age/days         Server Backup Path
> 0       full    yes     0       2/9 07:29       1767.6  9.0     
> /backup/BackupPC/pc/fileserver/0
> 2       incr    no      1       2/10 23:59      1124.8  7.3     
> /backup/BackupPC/pc/fileserver/2
> 3       incr    no      3       2/11 19:00      68.3    6.5     
> /backup/BackupPC/pc/fileserver/3
> 4       incr    no      4       2/12 01:00      73.6    6.3     
> /backup/BackupPC/pc/fileserver/4
> 5       incr    no      5       2/12 07:00      73.9    6.0     
> /backup/BackupPC/pc/fileserver/5
> 6       incr    no      6       2/12 13:00      102.5   5.8     
> /backup/BackupPC/pc/fileserver/6
> 7       incr    no      1       2/12 19:00      1097.0  5.5     
> /backup/BackupPC/pc/fileserver/7

You can see that incrementals 2 & 7 are level 1 (4th column).  Since the
full (#0) has a much smaller set of files, those level 1 incrementals
are backing up a lot of data, and a lot more than the original full.

Bottom line: you need to do a full backup.  It's going to take a while
(but no longer than the incrementals).  After that, the future fulls
and incrementals will be a lot faster.

Doing a full backup is good practice if you make a significant
configuration change that significantly changes what is being
backed up, or add a large amount of data.

Craig

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