Oracle-L: RE: Veritas Agent for Oracle / incremental backups vs. hot

From: Koivu, Lisa <Lisa.Koivu_at_efairfield.com>
Date: Wed, 19 Feb 2003 13:04:56 -0800
Message-ID: <F001.00551F5F.20030219130456@fatcity.com>

Allan, I disagree. From what I remember, rman incremental backups are also block-level, hence the savings in tape/disk and time. The tradeoff is at restore time.

Unless you are talking about a Veritas utility? There's no other way I know of in Oracle to execute an incremental backup outside of rman. ?? And honestly I wouldn't trust a third-party software tool to do it. I use backupexec/Oracle Agent for hot backups, and those are complete hot backups.

If I'm missing something please say so.

Lisa Koivu
Oracle Database Bonehead.
Fairfield Resorts, Inc.
5259 Coconut Creek Parkway
Ft. Lauderdale, FL, USA 33063
Office: 954-935-4117
Fax: 954-935-3639
Cell: 954-683-4459

-----Original Message-----
Sent: Wednesday, February 19, 2003 3:10 PM To: Multiple recipients of list ORACLE-L

Actually assuming you checkpoint or commit at least once between backups it would not make any difference at all. An incremental backup catches changed files since the last backup which will typically be all your data files. SCN's get updated in all headers if any thing changes.

Allan

-----Original Message-----
Sent: Wednesday, February 19, 2003 1:25 PM To: Multiple recipients of list ORACLE-L

My manager asked me to assess how much smaller our backups would be if we were doing incremental backups of our database files, instead of the usual hot backups.

We are running 8i on UNIX.

I know that the answer is "it depends" and "you can't really know 'till you try", but we are just looking for a ballpark figure, perhaps in percentages.

Our databases are between OLTP and DSS, closer to DSS environment, this being a scientific site.

Thanks.
Patrice Boivin
Systems Analyst (Oracle Certified DBA)

Systems Admin & Operations | Admin. et Exploit. des systèmes
Technology Services        | Services technologiques
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Maritimes Region, DFO      | Région des Maritimes, MPO

E-Mail: boivinp_at_mar.dfo-mpo.gc.ca

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Author: Boivin, Patrice J
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Author: Nelson, Allan
INET: anelson_at_midf.com

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Author: Koivu, Lisa
INET: Lisa.Koivu_at_efairfield.com

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