SQL Server Always On Availability Groups
SQL Server Always On Availability Groups is a high-availability and disaster recovery solution in Microsoft SQL Server that provides database-level failover for groups of databases. It allows multiple copies (replicas) of a set of databases to be maintained across different servers, ensuring data availability and redundancy. This feature supports automatic or manual failover, read-only access to secondary replicas, and integrates with Windows Server Failover Clustering for seamless operation.
Developers should learn and use SQL Server Always On Availability Groups when building mission-critical applications that require high availability, minimal downtime, and data protection against server failures or disasters. It is particularly useful in enterprise environments where database uptime is crucial, such as financial systems, e-commerce platforms, and healthcare applications, as it ensures continuous access to data and supports load balancing for read operations.