High availability (HA) refers to a system or component that is continuously operational for a long period of time. In the context of IT infrastructure, it is the design and implementation of systems that ensure a high level of operational performance and uptime, minimizing downtime and ensuring continuous access to services and data. Key aspects of high availability include: 1. **Redundancy**: Critical components are duplicated to ensure that if one fails, another can take over without interrupting the service.
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