How does SQL Server mirroring work?
Database Mirroring is used to move the database transactions from one SQL Server database (Principal database) to another SQL Server database (Mirror database) on a different instance. In SQL Server Log Shipping and Mirroring can work together to provide solutions for high availability and disaster recovery.
How do you manually fail over a database mirroring session?
To manually fail over database mirroring
- Connect to the principal server instance and, in the Object Explorer pane, click the server name to expand the server tree.
- Expand Databases, and select the database to be failed over.
- Right-click the database, select Tasks, and then click Mirror.
- Click Failover.
How do you pause mirroring?
To pause or resume database mirroring Right-click the database, select Tasks, and then click Mirror. This opens the Mirroring page of the Database Properties dialog box. To pause the session, click Pause. A prompt asks for confirmation; if you click Yes, the session is paused, and the button changes to Resume.
How to connect clients to a database mirroring session?
To connect to a database mirroring session, a client can use either SQL Server Native Client or.NET Framework Data Provider for SQL Server. When configured for a SQL Server database, these data access providers both fully support database mirroring.
Is there a mirror server in SQL Server?
No database mirroring session exists and there is no activity to report on the Mirroring page. The principal database is running but is not sending any logs to the mirror server. The mirror copy of the database is not available. The contents of the mirror database are lagging behind the contents of the principal database.
How to pause and resume a database mirroring session?
Using SQL Server Management Studio. To pause or resume a database mirroring session use the Database Properties Mirroring page. During a database mirroring session, connect to the principal server instance, in Object Explorer, click the server name to expand the server tree. Expand Databases, and select the database.
How to see the status of a mirroring session?
Right-click the database, select Tasks, and then click Mirror. This opens the Mirroring page of the Database Properties dialog box. After mirroring begins, the Status panel displays the status of the database mirroring session as of when you selected the Mirroring page or clicked the Refresh button.