In computing, high-availability clusters (HA clusters) or fail-over clusters are groups of computers that support server applications that can be reliably utilized with a minimum amount of down-time.

High-availability clusters are servers grouped together to operate as a single, unified system. Also known as failover clusters, they share the same storage but use different networks. They also share …

Aug 1, 2025 · What Is a High Availability Cluster? A high availability cluster is a group of servers, or nodes, that work together to keep your services running even if one of them fails.

Oct 16, 2025 · A high-availability cluster is a set of hosts that operate as a single system to provide continuous uptime. Companies use an HA cluster both for load balancing and failover mechanisms …

Jul 19, 2024 · Typically, HA systems meet two characteristics: They must be available for use close to 100% of the time. They must be able to meet a certain set of predetermined user expectations.

Nov 18, 2020 · High availability clusters are groups of hosts (physical machines) that act as a single system and provide continuous availability. High availability clusters are used for mission critical …

Mar 28, 2025 · High availability is the ability of an IT system to be accessible and reliable nearly 100% of the time, eliminating or minimizing downtime.

Dec 15, 2025 · What high availability really means in practice High availability is often summarized as “the system stays up,” but that definition is too vague to design against. Practitioners define HA in …

A High Availability Cluster is typically used for the provision of mission-critical application service delivery and consists of a group of computing resources operating together as a single system to …

High availability (HA) is a characteristic of a system that aims to ensure an agreed level of operational performance, usually uptime, for a higher than normal period.