I can help you with this if you need it.
Your RMAN script will need to allocate multiple channels to use multiple
drives. We backup over 3 PB of Oracle databases every month via RMAN and
Netbackup.
We do normal FS type backups of everything EXCEPT for the Oracle table spaces
and workspace. We leave those for each RMAN backup. Overall performance will
depend on multiple things like CPU, memory, disk performance, tape performance
and such as that…but on dedicated systems, we normally see over 200 MB / sec
per tape drive via RMAN backup to LTO-4 / 5 tape drives.
DENNIS PEACOCK
EDP
Systems Data Protection Engineer
Acxiom Corporation
EML dennis.peac...@acxiom.com
TEL501-342-6232
CELL 501-343-3366
301 E. Dave Ward Drive, Conway, AR, 72032, U.S.A.
WWW.ACXIOM.COMhttp://WWW.ACXIOM.COM
From: veritas-bu-boun...@mailman.eng.auburn.edu
[mailto:veritas-bu-boun...@mailman.eng.auburn.edu] On Behalf Of Lightner, Jeff
Sent: Monday, May 14, 2012 1:35 PM
To: veritas-bu@mailman.eng.auburn.edu
Subject: [Veritas-bu] Can RMAN be configured to use a limited number of tape
drives?
Currently we do RMAN backups for a small DB which essentially uses a single
stream with multiple jobs kicked off (i.e. it would only use one tape drive if
it were still going to tape).
We also do full filesystem backups for a couple of very large DBs after
shutting down the DBs completely.For those we allocate 4 streams which go
to 4 tape drives.
There is a question from DBAs about whether we could move do an RMAN backup
rather than filesystem so as to avoid the downtime on the DB. My main
question is how would we setup an RMAN policy so that it uses the 4 tape drives
(and only 4)?
For existing RMAN there are no streams listed so my assumption is that this is
all controlled in the RMAN config scripts rather than at NetBackup policy level.
Also does anyone have an idea how much time difference an RMAN backup of a live
database might take as compared to the cold backup of filesystems for a
quiesced database?
Please don’t suggest doing Mirror BCV or filesystem snapshot instead. We’re
already aware of such options but are currently looking at the RMAN question.
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