Gunadarma Backup and Recovery Study Guide, Study Guides, Projects, Research of Database Management Systems (DBMS)

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Backup and Recovery

Database System

Informatics Engineering

Gunadarma University

Introduction to Backup and Recovery: Backup and recovery are essential processes in database management for protecting data against loss, corruption, and accidental deletion. A backup is a copy of data stored separately from the primary database, while recovery involves restoring the database to a previous state using backups in case of data loss or corruption. Key Concepts in Backup and Recovery:

1. Backup Types: o Full Backup: Copies the entire database, including all data and schema objects. o Incremental Backup: Copies only the data that has changed since the last backup, reducing backup time and storage requirements. o Differential Backup: Copies all changes made since the last full backup, providing faster recovery compared to incremental backups. o Transaction Log Backup: Copies the transaction log, allowing for point-in-time recovery up to the time of the last log backup.
2. Recovery Models: o Full Recovery Model: Allows for point-in-time recovery using full and transaction log backups, suitable for databases requiring minimal data loss. o Simple Recovery Model: Allows only for full and differential backups, with no transaction log backups, suitable for databases with low recovery requirements.
3. Backup Strategies: o Regular Backup Schedule: Define a backup schedule based on the recovery requirements, frequency of changes, and criticality of data. o Offsite Backup Storage: Store backups in a separate location to protect against disasters like fire, theft, or hardware failure. o Backup Validation: Regularly test backups to ensure they are valid and can be restored successfully.

Conclusion: Backup and recovery are critical components of database management for ensuring data availability, integrity, and reliability. By understanding backup types, recovery models, and best practices, database administrators can implement robust backup and recovery strategies to protect against data loss and minimize downtime in case of disasters. Practice performing backups, restores, and recovery procedures to strengthen your skills in database backup and recovery.