Amanda-Users

Re: Amanda always doing full backup?

2009-05-14 15:08:35
Subject: Re: Amanda always doing full backup?
From: Jon LaBadie <jon AT jgcomp DOT com>
To: amanda-users AT amanda DOT org
Date: Thu, 14 May 2009 09:56:35 -0400
On Thu, May 14, 2009 at 08:32:16AM -0500, Brandon Metcalf wrote:
> I recently changed my config from
> 
>   dumpcycle 4 weeks
>   runspercycle 20
>   tapecycle 25 tapes
> 
> to
> 
>   dumpcycle 2 weeks
>   runspercycle 12
>   tapecycle 50 tapes
> 
> backups are working fine, but I'm confused by the following output
> which is just an example of one device:
> 
>   $ amadmin DailySet1 find quercus sda8
> 
>   date       host    disk lv tape or file file part status
>   2009-04-23 quercus sda8  0 DailySet1-04    5   -- OK
>   2009-04-24 quercus sda8  1 DailySet1-05    5   -- OK
>   2009-04-25 quercus sda8  0 DailySet1-06    5   -- OK
>   2009-04-28 quercus sda8  0 DailySet1-07    6   -- OK
>   2009-04-29 quercus sda8  0 DailySet1-08    6   -- OK
>   2009-04-30 quercus sda8  0 DailySet1-09    6   -- OK
>   2009-05-01 quercus sda8  1 DailySet1-10    6   -- OK
>   2009-05-02 quercus sda8  0 DailySet1-11    6   -- OK
>   2009-05-05 quercus sda8  0 DailySet1-12    6   -- OK
>   2009-05-06 quercus sda8  1 DailySet1-13    6   -- OK
>   2009-05-07 quercus sda8  0 DailySet1-14    6   -- OK
>   2009-05-08 quercus sda8  1 DailySet1-15    6   -- OK
>   2009-05-09 quercus sda8  0 DailySet1-16    6   -- OK
>   2009-05-10 quercus sda8  0 DailySet1-17    6   -- OK
>   2009-05-12 quercus sda8  0 DailySet1-18    6   -- OK
>   2009-05-13 quercus sda8  0 DailySet1-19    6   -- OK
>   2009-05-14 quercus sda8  0 DailySet1-20    6   -- OK
> 
> It seems that for the last fews days Amanda is doing a full backup
> every night.  The filesystem on sda8 contains only the lost+found
> directory and it or its contents are not changing.
> 
> However, according to the backup report, incrementals are definitely
> happening:

If sda8 contains only a L&F directory, and that directory is probably empty,
then amanda is probably saying both an incremental and a full backup will
take the same amount of space (one 32K block on tape) so why not do the
full backup.

-- 
Jon H. LaBadie                  jon AT jgcomp DOT com
 JG Computing
 12027 Creekbend Drive          (703) 787-0884
 Reston, VA  20194              (703) 787-0922 (fax)

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