Backup & Recovery — Production Strategy The 3-2-1 Rule Every production backup strategy must satisfy: - 3 copies of data (1 primary + 2 backups) - 2 different storage media or locations (e.g., local disk + cloud) - 1 offsite copy (different geographic region from primary) | Backup Type | Description | Use Case | |------------|-------------|----------| | Full | Complete snapshot of all data | Weekly baseline, before major upgrades | | Incremental | Changes since last backup (any type) | Daily; fast but requires chain for restore | | Differential | Changes since last full backup | Balances rest…