Steve,
Everything is based on the class, not the client. Incrementals are
only meaningful within a class and relative to a full backup. If no full
backup is done within a class, then all cumulative incrementals are
equivalent to full backups. Differential incrementals are different; the
files chosen there are relative to the last backup (full or incremental)
done for that class. As far as I see it, there is no way to link the
fulls of one class to be used as the basis for the incrementals of
another. So what you're seeing is exactly what you should see. The only
way to get what you want is to merge the two classes into one with two
schedules, one for fulls and one for incrementals.
As for TIR (True Image Restore), that will only impact what files get
restored. Without TIR, if you need to completely restore a volume from a
full backup and all incrementals (if doing differential incrementals, or
the single cumulative incremental otherwise, that followed the full ),
files backed up and later deleted from the volume will be restored. This
could result in more data being restored then you expected. With TIR,
filed deleted will not be restored so that the result of the restore will
match [as exactly as possible] the volume at the time of the last
incremental. The price for this added effect with TIR is the need to
maintain more info on what resided on disk volume at the time of each
backup meaning the NetBackup catalog is much larger. So you may want to
carefully think about the effect of activating it before you actually do
so.
-- Tony Guzzi
Solutions Engineer, AssuredRestore team
Storability, Inc.
118 Turnpike Road
Southborough, MA 01772
www.storabilility.com
The Leading Provider of Automated Storage Assurance for the Enterprise
Date: Tue, 31 Jul 2001 10:01:52 -0400 (EDT)
From: Steve Mickeler <steve AT neptune.on DOT ca>
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] cumulative incremental problems.
Do cumulative incrementals only apply to the class that is being backed
up, or does apply directly to the client ?
The person who was here before me had setup a seperate class and
schedule for each server.
So, for server A there is class A_weekly with a full backup on saturday
night at midnight, then there is a class A_daily which does a cumulative
incremental backup on sunday through friday night at midnight.
It looks like the cumulative incrementals are backing up as much data as
the full backups, leading me to beleive that the A_daily class is not
seeing any full backups within its class and is going ahead and backing
everything up since it has no previous full backup info.
Does this make sense ?
I also noticed that the 'True Image Recovery Information' option under the
class attributes on both classes has not been selected. Will this have an
impact on the ability to do a cumulative incremental backup ?
Thanks.
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