Chapter 1
Database Fundamentals
Course: Comptia Datasys Ds0 001
Subject: Comptia Datasys Plus Ds0 001
Chapter: Business Continuity
Backing up and restoring data are critical components of any robust IT infrastructure. Proper backup strategies not only protect against accidental deletions, hardware failures, and cyber-attacks (like ransomware), but also ensure business continuity and regulatory compliance.
1. Full Backup vs. Incremental vs. Differential Backups
Full Backup
A full backup is the process of creating a complete copy of all selected data from a system, application, or database at a specific moment. This forms the foundation of most backup strategies.
How it works: Every file, folder, and data block within the selected scope is copied to the backup destination, such as a local disk, network storage, tape, or cloud.
Advantages:
- Simplifies restoration since only one backup file is required.
- Offers a consistent snapshot of all data at a known point in time.