[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"glossary-availability-zone::en":3,"gloss-cluster-availability-zone::en":26,"gloss-next-availability-zone::en":9},{"slug":4,"category":5,"name":6,"definition":7,"meta_desc":8,"faq":9,"schema_markup":9,"related":10},"availability-zone","cloud","Availability Zone (AZ)","An availability zone is one of several physically isolated data centers inside a single cloud region, each with independent power, cooling, and networking, but linked to its siblings by fast, low-latency connections. Why it matters: distributing your app across two or three AZs in the same region protects you from the most common cloud failure — a single data center losing power or network — without the complexity of going fully multi-region. It's the highest-leverage reliability move most SaaS teams can make. Practical note: 'multi-AZ' is a checkbox on many managed services (databases, load balancers, Kubernetes node groups) — turn it on. Put your load balancer in front of instances spread across AZs, and enable multi-AZ replication on your primary database so a zone failure triggers an automatic failover instead of downtime. Cross-AZ traffic within a region is usually cheap or free, so there's rarely a cost reason to keep everything in one zone.","An availability zone is one physically isolated data centre inside a cloud region — spanning two or three survives a zone failure without cross-region latency.",null,[11,14,17,20,23],{"slug":12,"name":13},"load-balancer","Load Balancer",{"slug":15,"name":16},"multi-region","Multi-Region",{"slug":18,"name":19},"replication","Replication",{"slug":21,"name":22},"service-level-objective","Service Level Objective (SLO)",{"slug":24,"name":25},"uptime","Uptime",[27,31,34,38,41,44,47,50,53,56,57,60],{"slug":28,"category":5,"name":29,"updated_at":30},"autoscaling","Autoscaling","2026-08-24T02:46:37+00:00",{"slug":32,"category":5,"name":33,"updated_at":30},"block-storage","Block Storage",{"slug":35,"category":5,"name":36,"updated_at":37},"disaster-recovery","Disaster Recovery","2026-08-24T02:46:38+00:00",{"slug":39,"category":5,"name":40,"updated_at":37},"edge-ai","Edge AI",{"slug":42,"category":5,"name":43,"updated_at":30},"egress-fees","Egress Fees (Data Transfer Out)",{"slug":45,"category":5,"name":46,"updated_at":30},"finops","FinOps (Cloud Financial Operations)",{"slug":48,"category":5,"name":49,"updated_at":37},"immutable-infrastructure","Immutable Infrastructure",{"slug":51,"category":5,"name":52,"updated_at":37},"infrastructure-drift","Infrastructure Drift",{"slug":54,"category":5,"name":55,"updated_at":30},"managed-kubernetes","Managed Kubernetes",{"slug":15,"category":5,"name":16,"updated_at":30},{"slug":58,"category":5,"name":59,"updated_at":37},"noisy-neighbor","Noisy Neighbor",{"slug":61,"category":5,"name":62,"updated_at":30},"platform-as-a-service","Platform as a Service (PaaS)"]