Disaster Recovery Implementation
Designed and implemented a multi-region disaster recovery solution with automated failover capabilities, achieving under 5 minute RTO and near-zero RPO for critical business systems.
The Challenge: Single Point of Failure
A financial services company had their entire production infrastructure in a single AWS region. When that region experienced an outage, they lost 8 hours of business operations — translating to hundreds of thousands in revenue loss and damaged customer trust.
Last outage duration
Revenue lost per outage
No redundancy
Recovery process
DR Strategy: Active-Passive Multi-Region
I designed an Active-Passive disaster recovery architecture across two AWS regions with automated failover to minimize RTO and RPO:
Key DR Components
- RDS Multi-AZ in primary region
- Cross-region read replica to DR
- Automated promotion during failover
- Near-zero RPO with async replication
- S3 Cross-Region Replication (CRR)
- Same-day replication SLA
- Versioning enabled
- Lifecycle policies synchronized
- Route 53 health checks every 10s
- Failover routing policy
- TTL set to 60 seconds
- Automatic traffic switching
- AMIs replicated to DR region
- Launch templates synchronized
- Auto Scaling pre-configured
- Warm standby capacity
Automated Failover Process
To achieve the under 5 minute RTO, I implemented fully automated failover:
RTO & RPO Achievement
DR Testing & Validation
Implemented a rigorous DR testing program to ensure readiness:
Business Impact
Protected against $500K+ potential outage losses per incident
Met SOC 2 and regulatory requirements for business continuity
Stakeholders confident in infrastructure resilience
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