Always On is the name given to a suite of technologies that provide high availability and disaster recovery capabilities for SQL Server systems. There are a number of different technologies included under the Always On moniker, including Failover Cluster Instances (FCI), and Availability Groups (AG).

We have included a number of links that can help you learn more about the Always On suite of technologies, broken out by SQL Server version where applicable. 

If you find broken links or have additional suggestions for information, please leave a comment in the discussion for this article.

Getting Started

• Stairway to Always On - A good place to start your learning and get some basic knowledge.

• Combining Always On Groups With Failover Cluster Instances

• Always On Availability Groups for SQL Server 2012, 2014, 2016 - A list of articles on different setups.

SQL Server 2016

• Books Online - Always On Failover Cluster Instances
• Books Online - Always On Availability Groups
• Books Online - SQL Server 2016 Support for DTC and Always On Availability Groups
• Books Online - Configure load-balancing across read-only replicas
• Always On Availability Groups Enhancements in SQL Server 2016 - Video from Microsoft

SQL Server 2014

• Changes to SQL Server 2014 Always On Availability Groups
• Creating a SQL Server 2014 Always On FCI in Windows Azure

SQL Server 2012

• SQL Server 2012 Always On

• SQL Server Always On Availability Groups - Part 1 Configuration

• SQL Server Always On Availability Groups - Part 2 Availability Groups Setup

Continue learning more about SQL Server

View the index of features for the various versions.

• The complete list of new features for SQL Server 2016.
• Features in SQL Server 2014
• Features in SQL Server 2012