database-backup

# Database Backup This skill enables an AI agent to plan and execute database backup strategies across PostgreSQL, MySQL, and MongoDB. The agent selects the appropriate backup type (full, incremental, differential, or point-in-time), generates backup scripts with compression and encryption, configures automated scheduling via cron or similar tools, defines retention policies, and verifies backup integrity through restore tests. ## Workflow 1. **Assess backup requirements:** Determine the database type, size, acceptable data loss window (Recovery Point Objective), and acceptable downtime (Recovery Time Objective). Identify whether the backup must be consistent (application-level locks or snapshots) and whether the database can tolerate brief locking during the backup. 2. **Select backup strategy:** Choose the appropriate backup type based on requirements. Full backups capture the entire database and are simplest to restore but slowest to create. Incremental backups capture only changes since the last backup, saving time and storage. Differential backups capture changes since the last full backup, offering a middle ground. Point-in-time recovery (PITR) uses write-ahead logs or oplogs to restore to any moment, providing the lowest RPO. 3. **Generate backup scripts:** Produce shell scripts that invoke the correct backup tool for the target database. Include compression (gzip, lz4, or zstd), optional encryption (GPG or OpenSSL), timestamped filenames, and error handling with ...