{"id":"azure-ha-tier-and-zone-dual-requirement","text":"Azure zone-redundant high availability requires satisfying both tier and zone requirements independently: SQL Database excludes Basic/Standard DTU tiers from zone redundancy, VMSS requires explicit Availability Zone configuration for datacenter protection, and AKS multi-AZ defaults to ZRS storage only from Kubernetes 1.29 — making HA a compound tier+topology decision per service.","truth_value":"IN","source":"","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"azure-ha-tier-and-zone-dual-requirement","truth_value":"IN","reason":"premise"}]}}