REL11-BP07: Architect your product to meet availability targets and uptime service level agreements (SLAs)

Design your architecture with specific availability targets and SLA requirements in mind. This includes calculating expected availability, implementing appropriate redundancy, establishing recovery time objectives (RTO) and recovery point objectives (RPO), and continuously measuring and optimizing to meet commitments.

Implementation Steps

1. Define Availability Requirements

Establish clear availability targets, SLAs, and service level objectives (SLOs).

2. Calculate System Availability

Model your architecture to predict overall system availability based on component reliability.

3. Implement Redundancy Strategy

Design redundancy at appropriate levels to meet availability targets.

4. Establish RTO and RPO

Define recovery time and data loss objectives for different failure scenarios.

5. Monitor and Measure SLA Compliance

Implement continuous monitoring to track SLA performance and identify improvement areas.

Detailed Implementation

AWS Services

Primary Services

Amazon CloudWatch: SLA monitoring, metrics, and alerting
AWS Well-Architected Tool: Architecture review and recommendations
Amazon Route 53: DNS with health checks and failover
Elastic Load Balancing: High availability load balancing

Supporting Services

AWS Config: Configuration compliance monitoring
AWS Systems Manager: Operational insights and automation
Amazon CloudWatch Synthetics: Synthetic monitoring for SLA validation
AWS Cost Explorer: Cost analysis for redundancy strategies

Benefits

SLA Compliance: Meet contractual availability commitments
Predictable Performance: Architecture designed for specific availability targets
Cost Optimization: Right-size redundancy based on requirements
Risk Management: Quantify and mitigate availability risks
Continuous Improvement: Data-driven optimization of availability