[Veritas-bu] reverse of disk staging (staging for restores)

Hello Charlie

I think that the best bet is have enough staging space so that you can have a 
week on disk. 

Else you might to look at restore_notify and userreq_notify under 
netbackup/bin

Regards
Michael

On Thu, 8 Sep 2005 18:19:34 -0500, Charles Ballowe wrote
> Is there any way to cause certain types of restores to stage the
> necessary images to disk? Any scripts that get run when a restore 
> gets kicked off that could be used to do that?
> 
> The problem I'm trying to solve:
> 
> Lotus notes transaction logs - they're a fixed size of 64M, we get
> about 80/day backed up. When a lotus restore runs, it restores the
> database from the full and applies the transaction logs since that
> point. It requests the transaction logs one at a time rather than in
> any form of batch. A restore on thursday with the full on saturday
> night needs a significant number (80/day * 4 or so) and each of those
> requests, when going to tape, takes about 2 minutes (seek time, read
> through image until the file is reached, etc ... luckily mounts 
> aren't hit often as the tape stays mounted). I'm worried that this will
> increase in the future as we're likely changing from 9840 to LTO-3 --
> 9840B drives have an average seek time around 12sec, LTO are more like
> 45.
> 
> I just caught one of those restores in action and staged the images 
> it would need to disk and the time to restore each file went to 15 
> seconds or so - very little of which involved reading the file from 
> media (<5secs). As it took about 20 minutes to stage each day worth 
> of transaction logs to disk, and each one is used for about 80 individual
> files, this could save quite a bit of time on the restore. Not to
> mention wear on the tape drive.
> 
> It's easy enough to do, but being the standard sysadmin, I'd just 
> like to automate it.
> 
> -Charlie
> 
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