Definition
Architectural and operational practices that keep services available when a cloud region, zone, or provider suffers failure — especially critical for regulated finance.
Key Points
- 2026-10-20: Single-zone power failure at google-cloud
europe-west2-bcaused 6h10m regional disruption; UK/EU banks and fintechs impacted; eba/fca inquiries (2026-10-22-gcp-europe-west2-incident-report, 2026-10-22-gcp-outage-reuters-regulators) - Lesson: multi-AZ/multi-region DR, dependency mapping, regulator comms under critical-third-party regimes