Restore from old backup in 11 g

Hello

I wonder about the process of restoring a database to an old backup rman in GR 11, 2. As I understand it, the concept is based on an incomplete recovery using a + until time + or + YVERT + clause. For example:

{code}
target of $ rman / catalog rman/rman@rcat

(a) RMAN > list incarnation;
(b) RMAN > reset in the incarnation 4 database;
(c) RMAN > strength of startup nomount;
(d) RMAN > run {}
(e) RMAN > set up to that time "to_date('2010-10-05:12:00:00','YYYY-MM-DD:HH24:MI:SS')";
(f) RMAN > restore controlfile;
(g) RMAN > change the editing of the database;
(h) RMAN > restore database;
(i) RMAN > restore database;
(j) RMAN > alter database open resetlogs;
{code}

Why do I need to reset the incarnation of the database when I restore an old controlfile?

Clause of apparently OF backup AUTOMATIC is not necessary when you use the recovery catalog.

How can I know that a restoration of the controlfile is necessary - I still have need to restore the controlfile if there were changes to the database structure?

Thank you
Markus

Does this mean a RESET DATABASE is intended to be valued using the current controlfile?

Yes

That's why when you are using a backup controlfile a REST DATABASE is obsolete?

Do not reset.

What confuses me, is http://download.oracle.com/docs/cd/B12037_01/server.101/b10734/rcmrecov.htm

Recovery point-in-time to a previous Incarnation

In this case, you want return of database of State passed, according to time, that this time located before the resetlogs, so you need to ressetting, otherwise you will get an error.

The following example performs a DATABASE RESET, followed of a CONTROLFILE RESTORE of backup inside a command "set tile view deleted time" running - is the RESET DATABASE needed?

In this case, you have the recovery catalog, and if your backup controlfile location current incarnation so yes then reset the database.
This case, you use a backup controlfile, you use a recovery catalog, because of this, you need to reset database.

Published by: Alex on October 13, 2010 05:59

Tags: Database

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