A characteristic of a system that aims to ensure an agreed level of operational performance, usually uptime, for a higher than normal period.
High Availability (HA) architectures remove single points of failure. For AI that operations depend on, HA means redundant LLM inference nodes, load balancers, and Vector Databases distributed across multiple geographic zones, so the service keeps running through major hardware failures.
See also Air-Gapped Environment, Role-Based Access Control and Zero Trust Architecture.