Oracle Redo Logs Archiving: Purpose Explained

The purpose of Oracle archived logs is for database recovery and backup. When the database is in archive log mode, it records all database operations and changes into archive log files, which can be used to restore the database to a specific point in time and for database backup.

The role of archiving logs includes:

1. Database recovery: In the event of database failure or data corruption, archival logs can be used to restore the database to its state before the failure occurred, ensuring data integrity and consistency.
2. Database backup: Archived logs can be used as incremental backup for the database. By backing up the archived logs, you can restore to the state after the last backup, reducing the time and space costs of database backup.
3. Database performance optimization: Archived logs can be utilized by Oracle database for advanced functions such as data recovery, data migration, and data synchronization, ultimately improving the performance and reliability of the database.

In short, archiving logs ensures the reliability and integrity of the database, provides data recovery and backup capabilities, and supports advanced features and performance optimization of the database.