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Backing up control file [message #299912] Wed, 13 February 2008 11:31 Go to next message
clintonf
Messages: 82
Registered: May 2006
Member
Hi all,

Is it advisable to back-up control files to tape?

My backup strategy involves daily RMAN backups, including auto-backup of the control file. In addition I have one control file written to tape.

Is this advisable? Last night there was a locking issue between the database and the tape archiver (a 1 in a million chance I reckon, but it happened) which brought the database down entirely.

The answer seems obvious to me: don't write the control file to tape. But I (and others I am sure) would appreciate opinions from the more learned Oracle users around.

Thanks!
Re: Backing up control file [message #299915 is a reply to message #299912] Wed, 13 February 2008 11:35 Go to previous messageGo to next message
Michel Cadot
Messages: 64119
Registered: March 2007
Location: Nanterre, France, http://...
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Don't directly backup the control file to tape, backup it first to disk using alter database backup controlfile and then backup the copy to tape.

Regards
Michel
Re: Backing up control file [message #299917 is a reply to message #299915] Wed, 13 February 2008 12:24 Go to previous messageGo to next message
clintonf
Messages: 82
Registered: May 2006
Member
Is configuring RMAN to autobackup the control file (and spfile) sufficient or should I be explicitly backing up the control file also?

Thanks
Re: Backing up control file [message #299921 is a reply to message #299917] Wed, 13 February 2008 12:40 Go to previous messageGo to next message
Michel Cadot
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Registered: March 2007
Location: Nanterre, France, http://...
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It is theorically sufficient but as controlfile is a key component, it is better to backup it twice in different ways.

Regards
Michel
Re: Backing up control file [message #299923 is a reply to message #299912] Wed, 13 February 2008 12:44 Go to previous messageGo to next message
varu123
Messages: 754
Registered: October 2007
Senior Member
Is there any difference between manual controlfile backup and automatic controlfile backup?
Re: Backing up control file [message #299926 is a reply to message #299923] Wed, 13 February 2008 12:59 Go to previous message
Michel Cadot
Messages: 64119
Registered: March 2007
Location: Nanterre, France, http://...
Senior Member
Account Moderator
The way I suggest it, there is no relation at all.
"My" way does not use RMAN.
You could also use manual RMAN backup of control file, it is a third way.

Regards
Michel
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