[Veritas-bu] Full vs Incremental Backup

2002-04-30 11:51:35
Subject: [Veritas-bu] Full vs Incremental Backup
From: scott.kendall AT abbott DOT com (scott.kendall AT abbott DOT com)
Date: Tue, 30 Apr 2002 10:51:35 -0500
Yes, with NT it doesn't matter what class.  A differential incremental
(usually referred to as incremental by other backup apps) will clear the
archive bit after the backup, which will effect a subsequent backup regardless
of class (or even backup applications).

A cumulative incremental (usually referred to as a differential) will backup
things that have changed (again, based on the archive bit) but will not clear
the archive bit after the backup, thus not effecting subsequent backups.  If
you want to test a backup against the server but don't want to effect it's
next full or incremental use this (in the same class or different... doesn't

... and as others were saying, for UNIX NetBackup is Class specific on

- Scott

                    "Donaldson, Mark"                                           
                    <[email protected]        To:     "'Jeff 
Kennedy'" <jlkennedy AT amcc DOT com>, "Donaldson, Mark"          
                    om>                                  <Mark.Donaldson AT 
experianems DOT com>                                          
                    Sent by:                             cc:     "'David A. 
Chapa'" <david AT xbpadm-commands DOT com>, "Veritasbu        
                    veritas-bu-admin AT mailman DOT eng.        (E-mail)" 
<veritas-bu AT mailman.eng.auburn DOT edu>                             
                                     Subject:     RE: 
[Veritas-bu] Full vs Incremental Backup                  
                    04/29/2002 11:29 AM                                         

Ahh! Archive bit.  I was speaking to unix clients but there may be difference
between NT clients and Unix clients.  (Unix has no archive bit...).


-----Original Message-----
From: Jeff Kennedy [mailto:jlkennedy AT amcc DOT com]
Sent: Monday, April 29, 2002 10:26 AM
To: Donaldson Mark
Cc: 'David A. Chapa'; Veritasbu (E-mail)
Subject: Re: [Veritas-bu] Full vs Incremental Backup

Yes, please let us know.  Someone else asked me who it was I got this
info from.  After going over my notes it turns out it wasn't Veritas
direct but a VAR SE.  He said it was a function of the OS as to atime
and archive bit settings.


> "Donaldson, Mark" wrote:
> I'm running a test now - I'll check back with results.
> -Mark
> -----Original Message-----
> From: David A. Chapa [mailto:david AT xbpadm-commands DOT com]
> Sent: Monday, April 29, 2002 10:02 AM
> To: Jeff Kennedy; Donaldson Mark
> Cc: Veritasbu (E-mail)
> Subject: RE: [Veritas-bu] Full vs Incremental Backup
> Who did you confirm it with at Veritas?  I'd like to talk with
> them...since
> its always been same class only.  the current architecture of the
> product
> does not function that way...unless 4.5 has some fancy new feature.
> Hey, I may be dead wrong too...I'll track down one of the NBU
> developers
> here at the show and ask them.
> David
> <><><><><><><><><><><><><><><><><><><><>
> David A. Chapa
> NetBackup Consultant
> DataStaff, Inc.
> 847 413 1144
> ---------------------------------------
> NBU-LSERV AT datastaff DOT com - Adv. Scripting
> -----Original Message-----
> From: veritas-bu-admin AT mailman.eng.auburn DOT edu
> [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]On Behalf Of Jeff
> Kennedy
> Sent: Sunday, April 28, 2002 5:42 PM
> To: Donaldson Mark
> Cc: Veritasbu (E-mail)
> Subject: Re: [Veritas-bu] Full vs Incremental Backup
> I got an answer from Douglas Ritschel regarding this and the answer is
> yes, incrementals are schedule and class independent.  Any incremental
> (regardless of class or schedule) is based on the last full
> (regardless
> of class or schedule).  I confirmed this with Veritas.
> Be careful with those Offsite pools..... :-[
> ~JK
> "Donaldson, Mark" wrote:
> >
> >
> > I'm testing some new stuff, so I'm doing a full backup to a test
> pool,
> > then deleting the images later.
> >
> > It just occurred to me: Is the incremental backup of a server the
> > changed files as compared to the most recent full backup within the
> > same class or any class.
> >
> > -Mark
> _______________________________________________
> Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu

Jeff Kennedy
Unix Administrator
jlkennedy AT amcc DOT com

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