How do I backup my Controlfile to trace?
You have two options:
- Back up the control file to a binary file (duplicate of existing control file) using the following statement: ALTER DATABASE BACKUP CONTROLFILE TO ‘/oracle/backup/control. bkp’;
- Produce SQL statements that can later be used to re-create your control file: ALTER DATABASE BACKUP CONTROLFILE TO TRACE;
Can we take RMAN backup in Mount state?
We can take RMAN consistent backup when Oracle database is in mount state. A consistent backup occurs when the database is normal shutdown with commands: SHUTDOWN NORMAL, SHUTDOWN IMMEDIATE, or SHUTDOWN TRANSACTIONAL.
How do I restore a Controlfile to a different location?
One way to restore the control file to one or more new locations is to change the CONTROL_FILES initialization parameter, and then use the RESTORE CONTROLFILE command with no arguments to restore the control file to the default locations.
How do you recover from the loss of a Controlfile If you have backup of Controlfile?
To restore a backup control file to its default location:
- If the instance is still running, shut it down: SQL> SHUTDOWN ABORT.
- Correct the hardware problem that caused the media failure.
- Restore the backup control file to all locations specified in the CONTROL_FILES parameter.
- Start a new instance and mount the database.
What is alter database open Resetlogs in Oracle?
SQL> alter database open resetlogs; The OPEN RESETLOGS operation creates a new incarnation of the database, resets the log sequence to 1 and online redo logs are given a new time stamp and SCN. Prior to Oracle 10g, the newly generated redo log files could not be used with the backups taken in the past.
Which RMAN command takes Controlfile and Spfile backup?
RMAN – Backing Up the Control File A backup of the control file can be created using RMAN as follows: RMAN> backup current controlfile; Using the above command, a new backup set is created and the control file is backed up.
How do I backup RMAN to a specific location?
4.2.3 Specifying Output File Locations for RMAN BACKUP You can specify a FORMAT clause with the individual BACKUP command to direct the output to a specific location, as shown here: BACKUP DATABASE FORMAT=”/tmp/backup_%U”; Backups in this case are stored with generated unique filenames in the location /tmp/backups/ .
How do I move Controlfile?
To move or rename a controlfile do the following.
- Alter the control_files parameter using the ALTER SYSTEM comamnd.
- Shutdown the database.
- Rename the physical file on the OS.
- Start the database.
How do I change the redo log location in Oracle 12c?
- Shut down the database. SHUTDOWN.
- Copy the redo log files to the new location. Operating system files, such as redo log members, must be copied using the appropriate operating system commands.
- Startup the database, mount, but do not open it.
- Rename the redo log members.
- Open the database for normal operation.
How to use alter database backup controlfile to trace command?
The alter database backup controlfile to trace command will put the create database syntax in the trace file directory. The trace keyword tells oracle to generate a script containing a create controlfile command and store it in the trace directory identified in the user_dump_dest parameter of the init.ora file.
How to backup controlfile to a specific location?
You can use SQL statement to backup a copy of controlfile to a specific location. Database altered. 2. RMAN Backup Copy Use the following statement to get a copy of current controlfile. Please note that, the above copies can be used directly. No need to restore before using it, just copy it to the destination specified in SPFILE.
How to backup controlfile in Oracle?
Controlfile is an important part of the Oracle database and backing up the control file is a necessary operation. Here are How to backup controlfile in oracle We can enable auto backup of the controlfile using RMAN settings.
How to mount a database in Oracle Net database?
The database identifier is not related to the Oracle Net database specification. The startup_clauses let you mount and open the database so that it is accessible to users. Use the MOUNT clause to mount the database. Do not use this clause when the database is already mounted.