HA concepts in SQL server.

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Accepted Answer

HA stands for High Availability and refers to the ability of a system to remain operational even after a component failure.

SQL Server offers several HA options, including Always On Availability Groups, Failover Cluster Instances, and Database Mirroring.
Always On Availability Groups provide a high level of availability and can be used for disaster recovery as well.
Failover Cluster Instances use shared storage and provide automatic failover in case of a node failure.
Database Mirroring involves creating a redundant copy of a database on a separate server and can be used for disaster recovery.
HA solutions require careful planning and testing to ensure they meet the organization's needs and provide the desired level of availability.