On all of the SQL Server instances that you will configure as replicas in yourįirst, we need to enable Always ON Availability Group on two You have installed failover cluster we can now proceed with enabling theĪlwaysOn Availability Groups feature in SQL Server 2012.
We have two node windows failover cluster SQL1 & SQL2 already setup as shown in below screenshot. Running the SQL Server instances that we will configure as replicas We first need to add the Windows Failover Cluster Feature to all the nodes
OnceĬlustering is setup, 2012 is installed and configured, we can create our firstĪlwaysOn Availability Groups require a Windows Server Failover Cluster, The servers and give read/write access to all your service accounts. Server and this is the same for this new feature. You’ve ever setup log shipping you know you have to have a file share on a Use a different DNS name to resolve nameĬonflicts, or check the WSFC cluster log for more information The DNS name may have been taken or have aĬonflict with existing name services, or the WSFC cluster service may not be The WSFC cluster could not bring the Network Name resource Object permission to Windows Cluster, you will get an error as below whenĬreating a listener. The reason is that To get a database to SQL ServerĪvailability Group, it is more convenient to have the same drives and paths onĬluster’s name) installed on these 2 servers needs to be granted the CreateĬomputer Object privilege in the OU (Organization Unit) where these 2 servers Have drives of the same size and with the same name. Nodes in cluster (Ex: here 2 servers) must.
Sure you have two free IP’s each for windows cluster IP and Always on listener NIC is required if you want to isolate always on replication traffic to Sure you have a seperate NIC’s for public and private communication
Sure full backups of each of your databases are made prior to installingĬluster shared volume is required for Always on, it can be configured in local Participate in AlwaysOn Availability Groups. Included in your AlwaysOn group must be user databases. Sure your databases are in Full Recovery Mode, not Simple or Bulk Logged Shared network share on all participating nodes SQL server 2012 ( except SQL 2016 it supports basic availability group in On availability groups is only supported in Enterprise edition starting from SQL & OS Editions, Versions should be at same level on all participating Having separateĪccount is more secure and resilient, since a problem with one account won’t Separate accounts for SQL Agent service, SSRS, SSIS & SSRS. Prerequisites required to enable SQL Server 2012 Always On Availability Groupsĭomain user account be created for use by the SQL Server service. Availability Group is a HA (HighĪvailability) and DR (Disaster Recovery) solution.
Secondary databases are not backups.Ĭontinue to back up your databases and their transaction logs on a regular basis.Īvailability Group technology is based on Mirroring Technology. AnĪvailability group supports a set of primary databases and one to eight sets ofĬorresponding secondary databases. Azure Identity & Access Management (IAM)Īvailability group supports a failover environment for a discrete set of userĭatabases, known as availability databases that fail over together.Implementation – Best (Leading) Practices.WVD – Design & Implementation-Best Practices.