NetBackup is essentially doing file level backups rather than block level so it 
can't do the in file delta.   If you have a need for doing that then you should 
look at the data deduplication technology out there such as Data Domain, Avomar 
and others.   If you look through the archives you'll see a fair amount of 
discussion of these including a thread just a week or so ago.

-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu 
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Jorge 
Fábregas
Sent: Saturday, June 06, 2009 3:21 PM
To: VERITAS-BU AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] In-File Delta Technology

Hello everyone,

I'm still learning Netbackup (got around 1.5 years working with it) and I'm 
wondering... Is there a way to perform incremental backups using in-file 
delta technology (backup only changes within a file)?  I've seen a lot of 
features/options for Netbackup but I have never seen this...If indeed there 
isn't ...why isn't this type of ESSENTIAL technology part of Netbackup?

Just as an aside, I recently started backing up a server that runs "MS Virtual 
Server" that has around 9 guests...I back them up at night (obviously after 
shutting down the guests) and I know 5 of those 9 guests seldomly change but 
as you can imagine...because the timestamp on the virtual-hard-disks 
change ...they're backed up COMPLETELY.  The end result: I'm almost 
performing a FULL backup every day even though it's an incremental 
schedule   :(  

I'll appreciate your feedback. 

Thanks!

All the best,
Jorge

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