![]() You can repair a data file with only a small number of corrupt data blocks without taking it offline or restoring it from backup. You use the BACKUP INCREMENTAL command to perform incremental backups. If you enable block change tracking, then you can improve performance by avoiding full scans of every input data file. Thus, they provide more compact backups and faster recovery, thereby reducing the need to apply redo during data file media recovery. The most noteworthy are the following:Īn incremental backup stores only blocks changed since a previous backup. Most of this manual focuses on RMAN-based backup and recovery. The focus in the backup and recovery documentation set is almost exclusively on physical backups. Backing up a database is the act of making a physical backup. Unless otherwise specified, the term backup as used in the backup and recovery documentation refers to a physical backup. ![]() Logical backups are a useful supplement to physical backups in many circumstances but are not sufficient protection against data loss without physical backups. Physical backups are the foundation of any sound backup and recovery strategy. The Data Pump command-line clients expdp and impdp use the DBMS_DATAPUMP and DBMS_METADATA PL/SQL packages. You can use Oracle Data Pump to export logical data to binary files, which you can later import into the database. Logical backups contain logical data such as tables and stored procedures. Ultimately, every physical backup is a copy of files that store database information to another location, whether on disk or on offline storage media such as tape. These files include data files, control files, and archived redo logs. ![]() Physical backups are copies of the physical files used in storing and recovering a database. ![]() A backup can be either a physical backup or a logical backup. As a backup administrator, your primary job is making and monitoring backups for data protection.Ī backup is a copy of data of a database that you can use to reconstruct data. ![]()
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