Re: mirroring database storage

From: David Robillard <david.robillard_at_gmail.com>
Date: Fri, 24 Jun 2011 12:05:24 -0400
Message-ID: <BANLkTi=ERVYBuspMGiCnZYub5cYzdsj-Mg_at_mail.gmail.com>



Hello Maureen,

> Does anyone use, or see any problems with, mirroring database files to provide
> a quick way to recover in case of a disk problem?
>
> We aren't yet using RAC, we do have a standby database set up at our disaster
> recovery site and we do weekly cold backups of the database. We're thinking
> that mirroring the database storage disks would be another layer of protection.

Mirroring your database files is indeed a good idea. That's one of the basic Best Practices of data protection. You might want to read on the Oracle Maximum Availability Architecture (MAA)

http://www.oracle.com/technetwork/database/features/availability/maa-090890.html

Consider mirroring your OS disk drives too.

If you're looking for a quick way to recover your database, check the RMAN backup as copy command and the incrementally updated backup . Once this is in place and a datafile is broken, you can switch to the copy. It's fast and easy, but requires a lot of disk space. A bit more than twice what your database would use in fact.

Let me know if you need more info on that. I do have quite a long list of DocID on that topic at work and could send you those next monday along with the exact RMAN configuration and syntax.

HTH, David

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Received on Fri Jun 24 2011 - 11:05:24 CDT

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