Infrastructure
smplkit runs on AWS with multi-AZ redundancy across every service in the critical request path. The combined infrastructure SLA floor is 99.93% uptime.
Composite SLA: 99.93%
Every API request passes through a serial chain of AWS services — each one must be available for the request to succeed. The composite SLA is the mathematical product of each service's individual SLA:
| Service | Role | SLA | Link |
|---|---|---|---|
| Route 53 | DNS resolution | 100% | AWS SLA |
| Application Load Balancer | Load balancing and routing | 99.99% | AWS SLA |
| ECS Fargate | Compute (API containers) | 99.99% | AWS SLA |
| RDS PostgreSQL | Primary data store | 99.95% | AWS SLA |
1.00 × 0.9999 × 0.9999 × 0.9995 = 0.99930 → 99.93%
This represents a maximum of approximately 31 minutes per month of infrastructure-level downtime, based on the commitments AWS makes for these services under multi-AZ deployments.