Oracle-L: RE: RMAN - Some basic Qs.

From: DENNIS WILLIAMS <DWILLIAMS_at_LIFETOUCH.COM>
Date: Tue, 01 Apr 2003 08:18:49 -0800
Message-ID: <F001.005771FC.20030401081849@fatcity.com>

Vivek
1. RMAN works on an entirely different principle than hot backups. Much more transparent to the database.
2. RMAN incremental backups work by checking if a block has changed since the last incremental backup of the current level or lower. So only changed blocks get backed up on an incremental.
3. According to some recent postings on this list, not very well. 4. Easy is in the eye of the beholder. If you own an MML, make sure your version is compatible with RMAN. If your organization has already paid the big bucks for the MML, get started making it work. If not, you may want to consider beginning by backing up to disk.

Buy Robert Freeman's Oracle9i RMAN Backup & Recovery. It covers MML integration.

Dennis Williams
DBA, 40%OCP, 100% DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com

-----Original Message-----
Sent: Tuesday, April 01, 2003 9:19 AM
To: Multiple recipients of list ORACLE-L

Qs.1 Why is NO excessive Redo Generated wsing RMAN Backups unlike HOT Backups
when taking backup of an OPEN Database which is undergoing User Transactions ?
(Or am i mistaken ?)

Qs.2 How does RMAN manage Incremental Database Backups ? What is the Concept behing it ?

Qs.3 How does RMAN Check for Block Corruption while taking backup ?

Qs.4 Is it easy to integrate 3rd part tools like Legato etc with RMAN for enabling taking
of backups onto backup devices OR does it need an extensive setup ?

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Author: VIVEK_SHARMA
INET: VIVEK_SHARMA_at_infosys.com

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Author: DENNIS WILLIAMS
INET: DWILLIAMS_at_LIFETOUCH.COM

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