Veritas-bu

[Veritas-bu] EMC BCV Question

2002-10-30 12:56:08
Subject: [Veritas-bu] EMC BCV Question
From: ceverett AT virtual DOT com (Craig Everett)
Date: Wed, 30 Oct 2002 10:56:08 -0700
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You can attach the BCV to the standard M1 or primary volume while Oracle =
is not in backup mode. Once the BCV becomes 100% synchronized with the =
standard M1 you can put oracle in backup mode, break the BCV mirror, and =
then backup the BCV.=20

This BCV copy can be used to roll forward as long as you are backing up =
the archive logs for this database and have a continuous set of archive =
logs. Usually archive logs are backed up every hour with an independent =
incremental backup with it's own class or policy. If you've got archive =
logs from 8am to 5pm and your failure occurred at 6pm you could restore =
the BCV's to production by tape or just reverse sync the BCV's to the =
standard M1 or primary volume and then do your roll up with Oracle to =
5pm.

Using the BCV's gives you more ways than one to perform this recovery. =
Hope this answers your question.

Thanks,
Craig Everett
ASG Professional Services
Senior Consultant
ceverett AT virtual DOT com
619-917-6030
www.virtual.com

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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Interested in data replication? Check out my replication article for =
INFORSTOR=20
"Software versus hardware replication for disaster recovery"
http://is.pennnet.com/Articles/Article_Display.cfm?Section=3DArticles&Sub=
section=3DDisplay&ARTICLE_ID=3D146708




-----Original Message-----
From: Lee, Kenneth [mailto:Kenneth.Lee AT sbs.siemens DOT com]
Sent: Wednesday, October 30, 2002 9:01 AM
To: 'veritas-bu AT mailman.eng.auburn DOT edu'
Subject: [Veritas-bu] EMC BCV Question


First let me apologize for asking this question as it is only somewhat
related to NB.  We are in the process of implementing EMC BCV to backing =
up
an Oracle database (500GB).  I was told that you could create a BCV =
while
Oracle is live (no shutdown or hot backup mode required) and I agree =
with
this statement.  What I am not sure of is can you roll-forward with this
BCV.  For example, at 1:00, you snap your BCV and the production Oracle
continues to run (no stoppage).  At 4:00, something bad happens to
production Oracle.  You restore your BCV on top of production, can you
roll-forward the production logs up to 4:00?  The reason I am puzzle is
because when you snap the BCV at 1:00, the Oracle database (BCV) is
startable but will go into recovery mode.  It will rollback in-flight
transactions.  Can you apply the production logs to this database to =
bring
it to 4:00?

Thanks,
Ken

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Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
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