Architecture World 3 · Elastic Fleet · Stage 4

Lose a Zone

Availability Zone b goes dark at 09:14. Which fleet keeps serving, whose sessions survive, what comes back by itself, and how fast does traffic leave the dark zone?

Static stability
AZ rebalancing
Session stores
EC2 automatic recovery
Route 53 health checks
Zonal shift

Domain: Core architecture
World: Architecture World 3: Elastic Fleet (Professional)
Game type: Fleet clock: Choose how a database fails over, then play the outage.
Time: About 30 minutes on a first attempt (estimated)
Exam guides: SAA-C03Task 2.2: Design highly available and/or fault-tolerant architectures
SOA-C03Skill 2.2.1: Configure and troubleshoot Elastic Load Balancing (ELB) and Amazon Route 53 health checks; Skill 2.2.2: Configure fault-tolerant systems (for example, Multi-AZ deployments)
SAP-C02Task 2.4: Design a strategy to meet reliability requirements; Task 3.4: Determine a strategy to improve reliability
DOP-C02Task 3.1: Implement highly available solutions to meet resilience and business requirements