SQL Server AlwaysOn is the new comprehensive high availability and disaster recovery solution in SQL Server 2012. Using AlwaysOn, you can increase application availability and get a better return on your hardware investments through a simplified high availability (HA) deployment and management experience.
SQL Server AlwaysOn provides availability at either the application database or instance level. Learn more about how to use AlwaysOn to maintain availability at each of these levels.
Database Availability
AlwaysOn Availability Group provides high availability and disaster recover for application databases. Learn more...
AlwaysOn Failover Cluster Instance enhances the existing failover clustering instance and now provides high availability and disaster recovery for SQL Server Instances. Learn more...