What is an AG in SQL?
A read-scale availability group is a group of databases that are copied to other instances of SQL Server for read-only workload. An availability group supports one set of primary databases and one to eight sets of corresponding secondary databases. You can create any type of backup of a primary database.
What is AG listener?
An availability group listener is a virtual network name (VNN) that clients can connect to in order to access a database in a primary or secondary replica of an Always On availability group. A listener allows a client to connect to a replica without having to know the physical instance name of the SQL Server.
Where does SQL Server always on availability group take backup?
Secondary Only: Automated backup for the SQL availability group must occur on the secondary replica. We can have multiple secondary replicas with the same priority. In this case, it takes backup on the replica that comes first in the list of replica backup priorities
Is the SQL server maintenance plan AG aware?
Here is the point where we prove that the “Automation” is just conceptual. Basically, the SQL Server Maintenance Plan, is AG aware, and it has the backup task ready to interpret the backup options of the Availability Group. Knowing this, what happed if we run a simple (without IFs) BACKUP DATABASE command in the primary?
What’s the default SQL Server AlwaysOn backup preference?
SQL Server AlwaysOn Availability Group (AG) allows backups to be taken from the primary replica or any of the secondary replicas in the AG. By default, an AG backup preference is set to Prefer Secondary when you setup the AG using the New Availability Group Wizard and use the default configuration.
Is there an automated backup in SQL Server?
In other hand, an automated backup would be done by using the beloved SQL Server Maintenance Plan. Let’s analyse this: I created a simple Maintenance Plan, with a backup task including all the databases in the instance. You can notice that there’s a warning in the bottom of the window.