Part 149: Backup, Restore & Point-in-Time Recovery (PITR)

Disaster recovery strategies for production databases.

1. Logical Backups vs Physical Backups

• Logical Backup (pg_dump, mysqldump): Exports SQL statements. Portable, but slow on multi-terabyte databases.
• Physical Backup + WAL Archiving (PITR): Takes a raw file system snapshot and archives Write-Ahead Logs continuously. Allows rewinding the database to the exact second right before an accidental table drop!

Key Takeaways

• Test your backups regularly; an untested backup is not a backup!

In Part 150, we conclude our masterclass with The SQL Master Blueprint: 25 Principal Database Design & Performance Rules!