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.
When should I use restore database using backup controlfile until cancel?
If you are using a backup control file with this incomplete recovery, then specify the USING BACKUP CONTROLFILE option in the RECOVER command. Note: If you fail to specify the UNTIL clause on the RECOVER command, then you will not be able to open the database until a complete recovery is done.
What is backup Controlfile in Oracle?
Backing Up Control Files Use the ALTER DATABASE BACKUP CONTROLFILE statement to back up your control files. 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.
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 I fix Ora 01152?
As you see, you need to take one of the following actions to alleviate the ORA-01152 error: Continue to apply logs from your archived redo log filesystem: Ensure that you are in ARCHIVELOG mode and check your redo log file destination to ensure that you have enough redo logs.
What is alter database backup Controlfile?
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.
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 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.
What is data backup and recovery?
Backup and recovery describes the process of creating and storing copies of data that can be used to protect organizations against data loss.
What is difference between restore and backup?
So, when we’re talking about cloud backup and restore solutions, you might say backup is what goes up to the cloud, and restore is what comes back down. Even if you’re performing backups manually, it’s a directional thing—backups are outgoing data, while the restore is about incoming data.
How to recover a database from a backup controlfile?
If you try to recover the database, you are asked to use the USING BACKUP CONTROLFILE clause. So you need to use the recover database using backup controlfile command to tell Oracle that you are trying to recover the database from the binary copy of the controlfile
How do I recover a control file in RMAN?
When performing an RMAN recovery with only a single controlfile, you may want to issue the USING BACKUP CONTROLFILE RMAN RECOVER DATABASE command option. If you must use a control file restored from the backup, you will want to use the USING BACKUP CONTROLFILE option of the recover command.
Is backup control file required under RMAN or sqlplus?
When using SQLPLUS to recover the database “USING BACKUP CONTROLFILE” is required. Under RMAN is not needed since it automatically determines a BACKUP CONTROLFILE. So the issue was probably SQL vs. RMAN database recovery.
How to recover the database after media failure?
Scenario 1: Bob took a binary backup of the controlfile. The next day he loses all controlfiles of the database due to the media failure. As he has only the binary copy of the controlfile, he restores it and recovers the database. Take a binary backup of the controlfile and delete all controlfiles. Then shut down and start up the database