RMAN

Delete Archive Log Older Than 5 Days in Oracle RMAN Purpose The DELETE NOPROMPT ARCHIVELOG UNTIL TIME command removes old archive log files from your Oracle database to free up disk space and maintain storage efficiency. This RMAN (Recovery Manager) command automatically deletes archive logs that are older than a …

Oracle RMAN Database Restore and Recovery Guide Purpose A restore that fails at the first step is usually a startup problem, not a backup problem. RMAN needs the instance in the right state for each command. A lost controlfile needs a started instance with no mounted database. A lost datafile needs a mounted database. …

Oracle RMAN Database Backup Commands Guide Purpose A nightly backup job for an Oracle database must do four things. It must copy the data files, copy the archived redo logs, keep the control file safe, and remove old logs so the disk does not fill. The five RMAN commands below do these jobs. Each one suits a different …

Oracle RMAN Resync Catalog Command Guide Purpose The RESYNC CATALOG command synchronizes the metadata stored in your Oracle RMAN recovery catalog with the current information in the target database control file. This ensures that all backup, restore, and recovery operations use the most accurate and up-to-date database …

Oracle RMAN Crosscheck Backup Command - Verify Backup Availability Purpose The CROSSCHECK BACKUP command is an essential Oracle RMAN (Recovery Manager) tool that verifies whether backup files recorded in the RMAN repository still physically exist on storage media. This command synchronizes the logical records in your …

Oracle RMAN Reset Database After RESETLOGS Recovery Purpose In the Oracle 19c documentation, opening a database with RESETLOGS needs no manual step to register the new incarnation. Oracle creates the incarnation record in the recovery catalog and makes it the current incarnation for you. The RESET DATABASE command in …

Oracle RMAN Unregister Database from Recovery Catalog Purpose Unregistering a database from an Oracle RMAN (Recovery Manager) recovery catalog removes all backup metadata and database information from the catalog repository. This process is essential when a database is decommissioned, no longer needs catalog-based …

How to Register an Oracle Database with RMAN Catalog Purpose The RMAN register database command adds a target database to the recovery catalog so that Recovery Manager can track and maintain backup metadata. This allows RMAN to store backup information, recovery points, and database structure details in a central …

How to Create Oracle RMAN Recovery Catalog Step by Step Purpose The Oracle Recovery Manager (RMAN) recovery catalog is a dedicated database schema that stores metadata about backup and recovery operations for one or more target databases. This script demonstrates how to create a recovery catalog by establishing a …