Disaster Recovery
Implement disaster recovery strategies and procedures.
DR Metrics
yaml
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
| Strategy | RTO | RPO | Cost |
|---|---|---|---|
| Backup & Restore | Hours | Hours | $ |
| Pilot Light | Minutes-Hours | Minutes | $$ |
| Warm Standby | Minutes | Seconds | $$$ |
| Multi-Site Active | Near-zero | Near-zero | $$$$ |
AWS Multi-Region
bash
# 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
yaml
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