On Wednesday 25 June 2003 10:01, Ean Kingston wrote:
>> -----Original Message-----
>> On Wed, 25 Jun 2003 at 9:51am, Ean Kingston wrote
>>
>> > I don't believe so. Amanda uses either the vendor supplied dump
>> > program, or GNU tar to do the backup. I know GNU tar does not do
>> > differential backup and AFAIK none of the vendor supplied
>>
>> dump programs
>>
>> > will do differential backup either (I'm pretty sure for
>>
>> Solaris, AIX,
>>
>> > *BSD, and Linux derivatives).
>>
>> The terminology here is a bit confusing.  If by
>> "differential" you mean
>> only the bits (not whole files, but bits, like rsync) that
>> have changed,
>> then no, neither tar nor dump do that.  But if Roberto meant
>> incremental
>> (as in the files that have changed), then of course amanda does
>> that.
>>
>> Just trying to clarify for the archives.
>
>Good point. Since a 'differential backup' is 'just the bits that
> changed' (like rsync) for other backup software I've used, I
> assumed that Roberto meant that. Perhaps I should have been
> clearer.

And I sinned also in that I automaticly made the assumption that he 
actually meant incremental, since unlike an rsync scenario, the 
filesystem to do the differential against exists only on a tape some 
days back in the scheduleing, which for amanda, may as well be in 
Marrakesh or Ulan Bator.  Or maybe even on the moon.  The point being 
that its not directly accessable.  My bad.

-- 
Cheers, Gene
AMD K6-III@500mhz 320M
Athlon1600XP@1400mhz  512M
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Copyright 2003 by Maurice Eugene Heskett, all rights reserved.