Home » RDBMS Server » Backup & Recovery » Rman backup in mount stage (Oracle 10.2.0.2.0 ,solaris)  () 1 Vote
Rman backup in mount stage [message #397930] Tue, 14 April 2009 10:36 Go to next message
balaji1482
Messages: 312
Registered: July 2007
Location: INDIA
Senior Member

Hi,

Why is that we recover database and take whole database backup in cold backup in mount stage?

For example

rman target /
shutdown immediate;
startup mount;
backup database plus archivelog all;
alter database open;
exit

Is there any specific reason for this?

Regards,
Balaji

[Updated on: Tue, 14 April 2009 10:39]

Report message to a moderator

Re: Rman backup in mount stage [message #397934 is a reply to message #397930] Tue, 14 April 2009 10:51 Go to previous messageGo to next message
Mahesh Rajendran
Messages: 10672
Registered: March 2002
Location: oracleDocoVille
Senior Member
Account Moderator
>>Why is that we recover database and take whole database backup for cold backup in mount stage?
recovery and backup are different stages.
If the database is in noarchivelog mode, RMAN needs the database to be mounted.
If you are using user managed cold backups, you can just shutdown and backup.
With RMAN for consistent backup, database needs to be in mounted state as it can grab some essential information through backdoors.
Re: Rman backup in mount stage [message #397935 is a reply to message #397934] Tue, 14 April 2009 11:10 Go to previous messageGo to next message
balaji1482
Messages: 312
Registered: July 2007
Location: INDIA
Senior Member



Thanks for your information


Balaji
Re: Rman backup in mount stage [message #398850 is a reply to message #397930] Sat, 18 April 2009 08:23 Go to previous messageGo to next message
haykeenzy
Messages: 1
Registered: April 2009
Location: NIGERIA
Junior Member
oracle requires a connection to an instance before any changes can be done on the database, this is 1 reason you have mount the database before you can take backup
Re: Rman backup in mount stage [message #399230 is a reply to message #398850] Tue, 21 April 2009 03:39 Go to previous message
abs_amit
Messages: 59
Registered: January 2006
Location: delhi
Member
Apart from all these, RMAN reads information from Control file which is availabe only on MOUNT state.
Previous Topic: recover dump file
Next Topic: Oracle DB backup/restore (merged)
Goto Forum:
  


Current Time: Mon Dec 05 14:55:54 CST 2016

Total time taken to generate the page: 0.06630 seconds