RECOVERY MANAGER - RMAN
The traditional user-managed backup method consists simply of using operating system commands to copy the relevant files to a different location or tape device. With RMAN you can backup the database file within the database with help of database service itself. RMAN can backups of datafile and datafile image copy , controlfile and controlfile image copy ,archive redo logs, the spfile, and RMAN backup pieces. Oracle recommends using RMAN interface backup your database.
Benefits of RMAN
RMAN provides an array of benefits compared to user-managed backup methods, including th following:
1. You can perform incremental backup using RMAN. The size of database doesn't depend on database size, rather, it depends on the activity level within the database, because unchanged blacks are skipped during the incremental backup.
2. You can repair a datafile with a few corrupt data block online, without needing to restore to restoring a file from backup. this is called block media recovery.
3. A simple command ,such as BACKUP DATABASE ,can backup th entire database, without need for complex scripts.
4. RMAN can perform error checking during the backups and recovery .thus ennsuring that the backed-up files aren't corrupt. RMAN has the capability to recover ant corrupted data block without taking the datafile offline.
5.During the online backup no redo is generated.
6.If you use recovery catalog, you can store backup and recovery scripts directly in it .
7.RMAN enable you to make image copies , which is similar to operating system base backup.
8. RMAN is integrated well with the OEM backup functionality , so you can schedule backup job easily for the large number of database through a common management framework.
9. You can easily clone database and maintain standby database using RMAN functionality .
The traditional user-managed backup method consists simply of using operating system commands to copy the relevant files to a different location or tape device. With RMAN you can backup the database file within the database with help of database service itself. RMAN can backups of datafile and datafile image copy , controlfile and controlfile image copy ,archive redo logs, the spfile, and RMAN backup pieces. Oracle recommends using RMAN interface backup your database.
Benefits of RMAN
RMAN provides an array of benefits compared to user-managed backup methods, including th following:
1. You can perform incremental backup using RMAN. The size of database doesn't depend on database size, rather, it depends on the activity level within the database, because unchanged blacks are skipped during the incremental backup.
2. You can repair a datafile with a few corrupt data block online, without needing to restore to restoring a file from backup. this is called block media recovery.
3. A simple command ,such as BACKUP DATABASE ,can backup th entire database, without need for complex scripts.
4. RMAN can perform error checking during the backups and recovery .thus ennsuring that the backed-up files aren't corrupt. RMAN has the capability to recover ant corrupted data block without taking the datafile offline.
5.During the online backup no redo is generated.
6.If you use recovery catalog, you can store backup and recovery scripts directly in it .
7.RMAN enable you to make image copies , which is similar to operating system base backup.
8. RMAN is integrated well with the OEM backup functionality , so you can schedule backup job easily for the large number of database through a common management framework.
9. You can easily clone database and maintain standby database using RMAN functionality .
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