Recently I did quite a bit of benchmarking on restores with ORACLE RMAN
multiplexing.

We currently do 4 channels to 1 tape.

Our test backup was taking 39 mins, with a full restore time of 2 hours.
And we tested other channels, and it seems that the restore time is # of
channels times the backup time.  So my restores are 4 times a long as
the backup.

Well, we also tested sending each channel to different tape drives.
Well the same backup was restored in 38 mins!

So, I am in the process of modifying my VTL to have enough tape drives
so that we can un multiplex all of our backups.

Also I will add vaulting a multiplex image takes longer than one that is
not multiplex.  And yes, my vault profile is set to keep multiplexing.

Kevin 

-----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 Justin
Piszcz
Sent: Friday, July 27, 2007 6:50 AM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Has anyone done benchmarking of any sort with..

The delay on Multiplexed restores?

Justin.
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