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Multi-day AZ evacuation drills expose failures that short failover tests miss
Sustained evacuation tests can reveal issues with autoscaling, deployment placement, stale endpoints, and time-based operations such as certificate rotation and backups. The approach helps teams test whether multi-AZ resilience holds beyond an initial traffic shift.
- What
- A multi-day Availability Zone evacuation drill uses ARC Zonal Shift to test whether applications withstand sustained loss of an AZ.
- How
- Shifting traffic away from one AZ for 48–72 hours tests N-1 capacity, database stability, and client reconnection, while exposing time-dependent failures.
- Why it matters
- Long-duration drills help engineers verify that scaling, deployments, connections, and routine operations work under sustained production load.
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