What I do
- Create comprehensive DR plans
- Define RTO and RPO objectives
- Test recovery procedures regularly
- Implement failover and failback systems
- Design for various disaster scenarios
- Ensure business continuity
When to use me
When preparing for system failures, designing resilient infrastructure, or creating business continuity plans.
Key Metrics
RTO (Recovery Time Objective)
- Maximum acceptable downtime
- How long can the system be down?
- Typically defined in hours
RPO (Recovery Point Objective)
- Maximum acceptable data loss
- How much data can be lost?
- Typically defined in minutes/hours
SLA (Service Level Agreement)
- Committed availability
- Downtime allowances per year:
- 99% = 3.65 days/year
- 99.9% = 8.76 hours/year
- 99.99% = 52.6 minutes/year
- 99.999% = 5.26 minutes/year
DR Strategies
Backup & Restore
- Regular backups to offsite location
- Automated restore testing
- Pros: Simple, low cost
- Cons: Higher RTO
Pilot Light
- Core services running minimal
- Scale up on failover
- Pros: Faster than backup
- Cons: More complex
Warm Standby
- Scaled-down version running
- Quick scale on failover
- Pros: Faster recovery
- Cons: Higher cost
Multi-Region Active-Active
- Full deployment in multiple regions
- Traffic distributed
- Pros: Fastest recovery, highest availability
- Cons: Most expensive, complex
Disaster Recovery Plan
Assessment
- Identify critical systems
- Document dependencies
- Assess risks and impacts
- Define recovery priorities
Prevention
- Redundancy
- Monitoring
- Alerts
- Security
- Regular maintenance
Detection
- Monitoring systems
- Health checks
- Alerting
- Incident response team
Response
- Runbooks
- Escalation procedures
- Communication plan
- Documentation
Recovery
- Documented procedures
- Tested steps
- Team responsibilities
- Verification steps
Data Protection
Backup Strategies
- Full backups
- Incremental backups
- Differential backups
- Continuous replication
Backup Locations
- On-site (fast restore)
- Off-site (disaster protection)
- Cloud storage
- Air-gapped backups
Testing
- Restore testing
- Failover testing
- Full DR exercises
- Document results