Ref: https://www.udemy.com/course/aws-certified-cloud-practitioner-new/learn/lecture/29102338

AWS Blog Post: https://aws.amazon.com/blogs/architecture/disaster-recovery-dr-architecture-on-aws-part-i-strategies-for-recovery-in-the-cloud/ → Images in this section come from here

• Contents:

Disaster Recovery (DR) and Business Continuity (BC)

• 💡 Refresher from Tech Fundamentals: Backups & Disaster Recovery (DR)

Active/Passive DR Strategy

Active/Active DR Strategy

The Four DR Strategies in AWS Cloud

• 🔧 Trade-off: price/costs vs faster failover/recovery from a disaster
• FROM cheapest/slowest to restore TO most expensive/fastest to restore:
  1. Backup and Restore (just store snapshots/backups)
  2. Pilot Light (core functions of app ready, minimal setup)
  3. Warm Standby (full app ready, but at minimum size)
  4. Multi-Site/Hot-Site (full version of app at full size ready, can be used to load balance traffic with main infrastructure)

DR Services

• AWS Backup: centrally manage and automate backups across AWS services
  • On-demand and/or scheduled backups
  • Supports PITR (point-in-time-recovery)
  • Support for cross-region & cross-account (via AWS Organizations) backups