A backup control file is a file that stores information about the backups of a database. The backup control file is used by the Recovery Manager (RMAN) utility to determine which backups to use to restore a database. The backup control file is created when the RMAN utility is first used to back up a database.
The backup control file contains the following information:
· The name of the database being backed up
· The date and time of the backup
· The name of the backup file
· The type of backup (full, incremental, or cumulative)
The backup control file is automatically backed up with the database. If the backup control file is damaged or lost, the database can be restored using the backups stored in the control file.
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Where is RMAN control file backup?
Where is the RMAN control file backup?
The RMAN control file is a critical component of an RMAN backup. The control file contains information about the database and the backups made of the database. If the control file is lost or damaged, it can be difficult or impossible to restore the database. For this reason, it is important to make regular backups of the control file.
Where is the RMAN control file backup stored?
The control file is stored in the same location as the database it is backing up. If you are backing up a database on a remote server, the control file is also stored on the remote server.
What is control file in RMAN?
A control file is a file that stores information about a database. It contains a list of all the datafiles and archived redo logs that make up the database, as well as other information about the database. The control file is created when the database is first created, and it is updated every time the database changes.
The control file is a required component of a database, and it must be available for RMAN to back up or restore the database. If the control file is lost or damaged, the database can no longer be accessed.
What is backup control file in Oracle?
A backup control file is a copy of the database control file that is used to help recover the database if the original control file is damaged or lost. The backup control file is typically created when the database is first created, and then periodically updated as the database changes.
The backup control file contains information about the database, including the name and location of the datafiles and redo logs. It also contains the names and locations of the online and archived redo logs. If the original control file is lost or damaged, the backup control file can be used to create a new control file and restore the database.
How do I backup RMAN controls?
RMAN is an acronym for Recovery Manager, and it is a command-line tool used for backing up and restoring Oracle database files. It is included in the Oracle database software installation. Oracle Corporation recommends using RMAN to back up your database files.
RMAN maintains a database of all the backups and restores it has performed. This database is known as the RMAN repository. The repository is a critical part of your backup and restore strategy. You should back up the repository regularly.
There are two ways to back up the RMAN repository:
1. Back up the entire RMAN directory.
2. Back up the RMAN control file.
The first method is the simplest. The downside is that you must back up the entire RMAN directory, including the subdirectories. This can be a lot of data to back up.
The second method is more complex, but it has the advantage that you can back up only the RMAN control file. This is a smaller file and is less likely to change.
To back up the RMAN control file, you must first stop the RMAN daemon. Then you can back up the control file.
The following command backs up the RMAN control file to the /tmp directory:
$ tar -cvf /tmp/rman_control.tar /oracle/product/11.2.0/dbhome_1/rman/rman.control
The following command starts the RMAN daemon:
$ /oracle/product/11.2.0/dbhome_1/bin/rman
You can also use the startup script in the $ORACLE_HOME/bin directory.
What happens if we delete control file?
If you delete a control file, the database will not start. You will see the following error:
ORA-01157: cannot identify/lock data file 9 – see DBWR trace file
You need to restore the control file from a backup.
What happens if control file is lost?
A database is a collection of data that is organized in a specific way. A database management system (DBMS) is software that allows users to create and manage databases. A database is composed of one or more tables. A table is a collection of related data, and it is organized into columns and rows. The data in a table is accessed by using the column names as the keys.
A database is typically stored in a file system on a computer. The file system is a collection of files and directories that are used to store data. The files and directories are organized into a hierarchy. The root of the hierarchy is the top-level directory. The top-level directory is the parent of all other directories and files.
A database is typically divided into two parts: the data and the control files. The data file contains the data for the tables in the database. The control file contains the information that is needed to manage the database. The control file is a small file that contains the name of the database, the name of the tables, and the location of the data file.
The control file is important because it is used to create the tables in the database. The control file is also used to access the data in the tables. If the control file is lost, the database can no longer be accessed.
The best way to protect a database is to back up the data and the control file. The data can be backed up by copying the data file to another location. The control file can be backed up by copying the control file to another location.
How do I create a backup control file?
A control file is a critical component of a database. It contains information about the structure of the database, including the names and locations of the datafiles and logfiles. If the control file is damaged or lost, the database may be unusable. It is therefore important to create a backup copy of the control file.
There are two ways to create a backup of the control file: using the Oracle Export utility or using the SQL*Plus command.
To use the Export utility, connect to the database as SYS and run the following command:
EXPORT CONTROLFILE TO ‘/path/to/controlfile.bak’
This will create a backup copy of the control file in the specified directory.
To use the SQL*Plus command, connect to the database as SYS and run the following command:
BACKUP CONTROLFILE TO ‘/path/to/controlfile.bak’
This will also create a backup copy of the control file in the specified directory.
