RE: VTLs and backup time

date: Thu, 18 Aug 2022 16:55:54 +0000
from: Rob Berendt <rob@xxxxxxxxx>
subject: RE: VTLs and backup time

I have a single VTL connected to a Power 8 and a Power 9 in one location.
Each Power system has at least 5 lpars of IBM i. They are connected with
fiber channel through a switch. I can run multiple backups at the same
time and often do.

I haven't had a physical tape drive since LTO4 so I can't speak as to your
LTO7 performance.

BRMS supports this fine. If you're going to do this and you're running
BRMS look at DUPMEDBRM instead of just DUPMED.

Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1
Group Dekko
Dept 1600
Mail to: 7310 Innovation Blvd, Suite 104
Ft. Wayne, IN 46818
Ship to: 7310 Innovation Blvd, Dock 9C
Ft. Wayne, IN 46818
http://www.dekko.com

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From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Gad
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Sent: Thursday, August 18, 2022 12:40 PM
To: midrange-l@xxxxxxxxxxxxxxxxxx
Subject: VTLs and backup time

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Hello sages

As our nightly Prod machine backup time has grown to 7 hours
( SAVLIB *ALLUSER to one stand-alone LTO7 3580 tape )
We look into VTL to speed things up.
But, we must backup to tape also (air gap and such)
So, I think of this scenario:
a. get a VTL and connect it to both the Prod machine and the Dev machine
b. run the same nightly Prod machine backup to a VTL
c. during the day after , use DUPTAP on the Dev machine
to duplicate the Prod backup to tape .(the Dev machine has a 3580 Tape
also)

Now:
Is a back up to a VTL much faster then tape?
Can a VTL be directly connected to 2 machines so that a DUPTAP can be done?


TIA
Gad
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