Oracle’s Recovery Manager (RMAN) is a powerful backup and restore tool. It can be used to back up an entire database or specific tables, indexes, and datafiles. RMAN can also be used to create archivelogs, which are logs of all transactions that have been committed to the database.
RMAN can be used in two different ways: scripted and interactive. In scripted mode, you use RMAN commands to create and run backup and restore jobs. This mode is typically used for automated backups or when you need to script a complex backup or restore operation. In interactive mode, you run RMAN commands from a prompt. This mode is typically used for ad-hoc backups and restores.
RMAN can be used to create backups of an entire database or specific tables, indexes, and datafiles. A backup can be created in either image or datafile format. An image backup is a copy of the entire database. A datafile backup is a copy of the data in a specific datafile.
RMAN can also be used to create archivelogs. An archivelog is a log of all transactions that have been committed to the database. When a backup is created, RMAN automatically creates archivelogs for each backup.
RMAN can be used in scripted or interactive mode to create backups and archivelogs. In scripted mode, you use RMAN commands to create and run backup and restore jobs. This mode is typically used for automated backups or when you need to script a complex backup or restore operation. In interactive mode, you run RMAN commands from a prompt. This mode is typically used for ad-hoc backups and restores.
RMAN can be used to create backups of an entire database or specific tables, indexes, and datafiles. A backup can be created in either image or datafile format. An image backup is a copy of the entire database. A datafile backup is a copy of the data in a specific datafile.
RMAN can also be used to create archivelogs. An archivelog is a log of all transactions that have been committed to the database. When a backup is created, RMAN automatically creates archivelogs for each backup.
RMAN can be used in scripted or interactive mode to create backups and archivelogs. In scripted mode, you use RMAN commands to create and run backup and restore jobs. This mode is typically used for automated backups or when you need to script a complex backup or restore operation. In interactive mode, you run RMAN commands from a prompt. This mode is typically used for ad-hoc backups and restores.
Contents
- 1 How do I run a full backup of RMAN?
- 2 How do I run archive log backup in RMAN?
- 3 Which RMAN command takes Controlfile and Spfile backup?
- 4 How do I backup RMAN to a specific location?
- 5 What is the difference between a full backup and a whole database backup?
- 6 Can I take RMAN backup when the database is down?
- 7 How do I check my Archivelog backup?
How do I run a full backup of RMAN?
A full backup backs up all files and datafiles in the database. You can use a full backup to restore the entire database.
To run a full backup of an RMAN-managed database:
1. Connect to the target database as an RMAN user.
2. Issue the BACKUP command to create the full backup.
3. Specify the FULL keyword to indicate that you want to create a full backup.
4. Optionally, specify the CHECKSUM keyword to compute a checksum for the backup.
5. Optionally, specify the COMPRESSION keyword to compress the backup.
6. Optionally, specify the FORMAT keyword to specify the format of the backup.
7. Optionally, specify the DATAFILE keyword to specify which datafiles to include in the backup.
8. Optionally, specify the TABLESPACE keyword to specify which tablespaces to include in the backup.
9. Optionally, specify the TAG keyword to give the backup a name.
10. Optionally, specify the SIZE keyword to indicate the size of the backup.
11. Optionally, specify the REWIND keyword to rewind the backup media after the backup is created.
12. Optionally, specify the KEEP keyword to indicate the number of backups to keep.
13. Optionally, specify the CLEAR keyword to delete all backups on the backup media.
14. Issue the BACKUP command again to create a backup of the archived redo logs.
15. Issue the BACKUP command again to create a backup of the control file.
How do I run archive log backup in RMAN?
There are a few different ways to run an archive log backup in RMAN. In this article, we’ll cover the most common way.
To run an archive log backup in RMAN, you first need to open an RMAN session. Once you’re in RMAN, you can run the following command:
BACKUP ARCHIVELOG ALL BETWEEN TIME ‘SYSDATE-7’ AND TIME ‘SYSDATE’
This will back up all of the archive logs between the current date and seven days ago. You can change the time to whatever you want.
You can also back up a specific set of archive logs by using the following command:
BACKUP ARCHIVELOG FROM TIME ‘SYSDATE-7’ UNTIL TIME ‘SYSDATE’
This will back up all of the archive logs between the current date and seven days ago.
You can also use the RMAN LIST command to view a list of all of the archive logs that are available to be backed up.
That’s how you run an archive log backup in RMAN.
Which RMAN command takes Controlfile and Spfile backup?
There are a few different RMAN commands that can be used to take backups of your Control File and SPFILE. In this article, we will discuss the different commands and explain when each should be used.
The CONTROLFILE and SPFILE backups are critical for database recovery. If either of these files are lost or damaged, the database will not be able to start. It is therefore important to ensure that these files are backed up regularly and that the backups are stored in a safe location.
The CONTROLFILE is a static file that stores the database configuration information. The SPFILE is a dynamic file that stores the current parameter settings for the database.
The following RMAN commands can be used to back up the Control File and SPFILE:
BACKUP CONTROLFILE TO TRACE
BACKUP SPFILE TO TRACE
BACKUP SPFILE TO DISK
BACKUP CONTROLFILE TO DISK
BACKUP SPFILE TO URL
BACKUP CONTROLFILE TO ARCHIVE LOG
BACKUP SPFILE TO ARCHIVE LOG
BACKUP CONTROLFILE TO BACKUP SET
BACKUP SPFILE TO BACKUP SET
The most common commands for backing up the Control File and SPFILE are BACKUP CONTROLFILE TO DISK and BACKUP SPFILE TO DISK. These commands will back up the files to a location on your local filesystem.
The BACKUP CONTROLFILE TO TRACE and BACKUP SPFILE TO TRACE commands can be used to create a backup of the Control File or SPFILE in trace format. This can be useful for troubleshooting purposes.
The BACKUP CONTROLFILE TO URL and BACKUP SPFILE TO URL commands can be used to back up the Control File or SPFILE to a location on a remote filesystem.
The BACKUP CONTROLFILE TO ARCHIVE LOG and BACKUP SPFILE TO ARCHIVE LOG commands can be used to back up the Control File or SPFILE to an archive log file.
The BACKUP CONTROLFILE TO BACKUP SET and BACKUP SPFILE TO BACKUP SET commands can be used to back up the Control File or SPFILE to a backup set. This allows you to create a backup of the Control File or SPFILE that can be restored using the RMAN RESTORE command.
How do I backup RMAN to a specific location?
Backing up an RMAN repository is a critical task for any Oracle database administrator. The repository stores all of the information necessary to perform backups and restores, so it’s essential to protect it from data loss.
There are a number of ways to back up an RMAN repository. One option is to use the RMAN BACKUP command to copy the repository to a specific location. This command can be used to back up the repository to a file or to a tape device.
To back up the repository to a file, use the following command:
BACKUP DATABASE PLUS ARCHIVELOG
To back up the repository to a tape device, use the following command:
BACKUP DATABASE PLUS ARCHIVELOG TO TAPE
The RMAN BACKUP command can also be used to back up the control file and the server parameter file.
When backing up an RMAN repository, it’s important to remember to include the ARCHIVELOG keyword. This keyword tells RMAN to include all archived logs in the backup. If the ARCHIVELOG keyword is not included, only the most recent archived log will be backed up.
It’s also important to remember to include the TO TAPE keyword when backing up to a tape device. This keyword tells RMAN to write the backup to the tape device rather than to the file system.
The RMAN BACKUP command can also be used to back up a specific set of files. To back up a specific set of files, use the following command:
BACKUP DATABASE PLUS ARCHIVELOG FILESET=”
The parameter specifies the name of the file or files that should be backed up.
When backing up an RMAN repository, it’s important to use the correct command syntax. Incorrect syntax can result in data loss. For more information on the RMAN BACKUP command, consult the Oracle documentation.
What is the difference between a full backup and a whole database backup?
When it comes to backing up your data, there are two main types of backups: full backups and whole database backups. But what’s the difference between them?
A full backup is a backup of all the data on your computer. A whole database backup, on the other hand, is a backup of the entire database, including all its tables, data, and structure.
Which one you should use depends on your needs. If you just need to restore a few files, then a full backup will do. But if you need to restore an entire database, then you’ll need to use a whole database backup.
Can I take RMAN backup when the database is down?
The answer to this question is both yes and no. You can take an RMAN backup of a database that is down, but it will not be a valid backup. The backup will not be usable if the database is ever brought back up.
There are a few things to consider when taking an RMAN backup of a database that is down. First, you need to make sure that you are using a valid backup mode. The two valid backup modes are backup mode and copy mode. In backup mode, the backup is created on the target and the source is not modified. In copy mode, the backup is created on the target and the source is copied to the target.
Second, you need to make sure that you are using a valid backup set. A valid backup set is one that is created with the correct options. The most important option is the target database option. This option tells RMAN which database to back up.
Third, you need to make sure that you are using a valid backup device. A valid backup device is one that is connected to the target database.
Fourth, you need to make sure that the database is in a consistent state. A consistent state means that the datafiles are not in use and that the data in the datafiles is correct.
If you are able to meet all of these requirements, you can take an RMAN backup of a database that is down. However, it is important to note that the backup will not be usable if the database is ever brought back up.
How do I check my Archivelog backup?
Oracle Database provides a number of different ways to back up your data. You can use the Archivelog backup method to back up your database’s archived redo logs. This article will show you how to check your Archivelog backup.
To check your Archivelog backup, you will need to use the Recovery Catalog. The Recovery Catalog is a repository for information about your database’s backups. It stores information about the backups themselves, as well as the files that were used to create those backups.
The first step is to open the Recovery Catalog. To do this, log in to your database using the SQL*Plus command-line tool. Once you are logged in, type the following command:
SQL> RECOVERY_CATALOG_DATABASE
This will open the Recovery Catalog.
The next step is to connect to the Recovery Catalog. To do this, type the following command:
SQL> CONNECT CATALOG=
Where is the name of the Recovery Catalog database.
Once you are connected to the Recovery Catalog, you can view the information about your backups. To do this, type the following command:
SQL> SELECT * FROM V$BACKUP_DATABASE;
This will display information about all of your database’s backups, including the Archivelog backups.
