Huh?

"if data is in the cumulative backup image" sounds exactly like what I said - 
you can restore any data in the incremental (including a cumulativeincremental) 
whether it is NDMP or not.    My point was you can NOT restore data from the 
full that preceded it after that full has expired (without doing a reimport).

The fact that you posted makes it sound like you're implying that with NDMP one 
can restore data from the full even if it has expired so long as the subsequent 
cumulative is still there.   Is that the case?  Have you tested this?   If so 
are you saying one can do the restore using normal NetBackup restore methods or 
are you saying that the image hasn't actually been deleted from NDMP so you can 
reimport it?   If the latter then that is the same as you can do from tape so 
long as you haven't reused the tape since its images expired.

From: nbu ser [mailto:nbu...@live.com]
Sent: Friday, October 19, 2012 8:53 AM
To: Lightner, Jeff; veritas-bu@mailman.eng.auburn.edu
Subject: RE: [Veritas-bu] Incremental backup question

In case of normal OS level backups Full backup is required to go with a 
cumulative backup. But in case of NDMP even if Full backup has expired, we can 
still restore data from a cumulative backup if data is in the cumulative backup 
image.
________________________________
From: jlight...@water.com<mailto:jlight...@water.com>
To: veritas-bu@mailman.eng.auburn.edu<mailto:veritas-bu@mailman.eng.auburn.edu>
Date: Tue, 16 Oct 2012 15:27:29 +0000
Subject: Re: [Veritas-bu] Incremental backup question
The incremental will have any files it backed up still on it and those can be 
restored.   However unless most of your files change on a daily basis you're 
not likely to have most of the files in the incremental.

That is to say that a full OR an incremental CAN be restored without respect to 
the other backups but the INTENT is that the full be restored first then the 
subsequent incrementals (or a single cumulativeincremental) since that full 
should be restored on top of it to get the changes since the full.

If the full expired but the media it was written on has not been reused you can 
re-import the full and then restore it.   The re-import will change the 
expiration date relative to the date of import rather than the date of backup.




From: 
veritas-bu-boun...@mailman.eng.auburn.edu<mailto:veritas-bu-boun...@mailman.eng.auburn.edu>
 
[mailto:veritas-bu-boun...@mailman.eng.auburn.edu]<mailto:[mailto:veritas-bu-boun...@mailman.eng.auburn.edu]>
 On Behalf Of Whelan, Patrick
Sent: Tuesday, October 16, 2012 9:57 AM
To: veritas-bu@mailman.eng.auburn.edu<mailto:veritas-bu@mailman.eng.auburn.edu>
Subject: [Veritas-bu] Incremental backup question

Hi All,

I suppose the answer is obvious, but I'm having trouble getting my head around 
it.
What happens to an incremental backup whose dependent full has expired.
For example
A full backup is run and expires in 90 days. 89 Days later an cumulative 
incremental is run and expires in 30 days. Two days later the Full expires. Is 
the incremental still useful? If so, to what extent.

Regards,

Patrick Whelan
Senior NetBackup Specialist
+44 (0)207 995 9715

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