# Disaster Recovery

> Implement disaster recovery strategies and runbooks. Configure RPO/RTO targets and failover procedures. Use when planning for business continuity.

- Skill: `majiayu000/disaster-recovery-3` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/disaster-recovery-3`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/disaster-recovery-3/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Security
- License: MIT
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/disaster-recovery-3

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# 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