HOT BACKUP & RECOVERY donkeytime.org | Oracle Database | BackupWhen new incarnation happens, the old backup information in control file will be lost. It will be preserved in recovery catalog. Crosscheck will be useful to check whether the catalog information is intact with OS level information. This command only updates repository records with the status of the backups. Validate command is to examine a backup set and report whether it can be restored. RMAN scans all of the backup pieces in the specified backup sets and looks at the checksum to verify that the contents are intact so that backup can be successfully restored if necessary. Crosscheck command is to verify the status of backups and copies recorded in the RMAN repository against media such as disk or tape.
HOT BACKUP & RECOVERY SCENARIOS.pdf
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Cold backup can be taken after you shutdown the database, now database is unavailable for database users. Hot backup is active backup, it can be done when the database is running and data is being updated or read by database users. Once put your database in backup mode, Oracle only freezes the datafile headers, but it keep updating the blocks inside the datafile. So their headers are at the same SCN, but the database blocks are not. The database writer DBWR is updating the file. During hot backup, when we are copying a data file meanwhile, the database is writing to the data file by DBWR.
Duration: 3 Days What you will learn After completing this course, students should be able to evaluate their own recovery requirements and develop an appropriate strategy for backup and recovery procedures. This course reviews the backup and recovery techniques that are discussed in the Oracle Database 11g: Administration Workshop I and II courses, and examines various backup, failure, restore, and recovery scenarios. Flashback features are also described as an additional way to recover from various errors. Extensive hands-on practices and workshops provide the student with experience in a realistic technical environment. This course includes interactive workshops that provide participants with the opportunity to diagnose and recover from numerous failure scenarios, based on backup and recovery case studies. Vesti 13 jun , Potvrdjeni Oracle kursevi do kraja godine.