Disaster Recovery

Implement disaster recovery strategies and procedures.

DR Metrics

recovery_metrics:
  RTO: Recovery Time Objective
    - Maximum acceptable downtime
    - How long to restore service
    
  RPO: Recovery Point Objective
    - Maximum acceptable data loss
    - How much data can be lost

DR Strategies

AWS Multi-Region

# Cross-region RDS replica
aws rds create-db-instance-read-replica \
  --db-instance-identifier dr-replica \
  --source-db-instance-identifier prod-db \
  --source-region us-east-1 \
  --region us-west-2

# S3 cross-region replication
aws s3api put-bucket-replication \
  --bucket source-bucket \
  --replication-configuration file://replication.json

DR Testing

dr_test_schedule:
  tabletop: Quarterly
  component_failover: Monthly
  full_failover: Annually
  
test_checklist:
  - [ ] Verify backup integrity
  - [ ] Test failover procedures
  - [ ] Validate data consistency
  - [ ] Measure actual RTO/RPO
  - [ ] Document lessons learned

Best Practices

• Regular DR testing
• Automate failover where possible
• Document all procedures
• Update runbooks after tests