Is SQL Server mirroring deprecated?

Database mirroring is a cost-effective and easy to configure high availability solution. Unfortunately, this feature has been deprecated, but still, some organizations use database mirroring as a high availability solution. Database mirroring can be configured in SQL Server Standard edition.

Is database mirroring deprecated?

Mirroring has been around since SQL Server 2005 sp1 but with the release of SQL Server 2012 mirroring has now been placed on the deprecation list. That’s right, Microsoft are removing this feature from SQL Server.

Is mirroring supported in SQL Server 2019?

SQL Server Database Mirroring is a technology used for disaster recovery scenarios and is used by many DBAs. Even though Microsoft states that it is a deprecated feature, it is still hanging around in SQL Server 2019.

What is deprecated in SQL?

When a SQL Server version goes out of support, the associated database compatibility level will be marked deprecated. However, we will continue to support applications certified on any supported Database Compatibility Level as long as possible, to make the upgrades easier.

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How do I know if my SQL Server database is mirrored?

To view the status of a database mirroring session

  1. After connecting to the principal server instance, in Object Explorer, click the server name to expand the server tree.
  2. Expand Databases, and select the database to be mirrored.
  3. Right-click the database, select Tasks, and then click Mirror.

What is database mirroring?

Database mirroring is a relational database management (RDMS) technique to maintain consistent data in spite of high availability needs by creating redundant copies of a dataset.

What are the prerequisites for database mirroring?


  • For a mirroring session to be established, the partners and the witness, if any, must be running on the same version of SQL Server.
  • The two partners, that is the principal server and mirror server, must be running the same edition of SQL Server. …
  • The database must use the full recovery model.

What is the difference between mirroring and always on?

Finally, with database mirroring, the mirror database is always in a state of recovery, which essentially means it can’t be used while mirroring is active. … With AlwaysOn, the replica databases provide read-only access to use for reporting and backup purposes, offloading some of the workload from the primary server.

What is difference between log shipping and mirroring?

When log shipping uses with a remote monitoring instance, combining the log shipping session and database mirroring affects the information in the monitor tables. The information about the primary is a combination of the one configured at the principal/primary and the monitor configured on each secondary.

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How do I mirror a SQL database to another server?

To configure database mirroring, you can use the following procedure:

  1. Connect to the primary server.
  2. Ensure the database is at Full recovery model.
  3. Enable database mirroring.
  4. Configure database mirroring security.
  5. Define whether or not a witness server is used for automatic failover.

Is Ntext deprecated in SQL Server?

ntext, text, and image data types will be removed in a future version of SQL Server. Avoid using these data types in new development work, and plan to modify applications that currently use them. Use nvarchar(max), varchar(max), and varbinary(max) instead.

What is discontinued in SQL?

A discontinued feature is one level up from deprecation, in that it is no longer available. If we are using a discontinued feature when we upgrade to a new version of SQL Server, that feature is gone and our code will break.

What is the compatibility level in SQL Server?


Product Database Engine Version Supported Compatibility Level Values
SQL Server 2016 (13.x) 13 130, 120, 110, 100
SQL Server 2014 (12.x) 12 120, 110, 100
SQL Server 2012 (11.x) 11 110, 100, 90
SQL Server 2008 R2 10.5 100, 90, 80

How do I stop mirroring in database?

To remove database mirroring

  1. During a database mirroring session, connect to the principal server instance, in Object Explorer, click the server name to expand the server tree.
  2. Expand Databases, and select the database.
  3. Right-click the database, select Tasks, and then click Mirror.

What is database mirroring in SQL Server 2016?

SQL Server database mirroring is a disaster recovery and high availability technique that involves two SQL Server instances on the same or different machines. One SQL Server instance acts as a primary instance called the principal, while the other is a mirrored instance called the mirror.

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What is endpoint in database mirroring?

In this article

This endpoint is a special-purpose endpoint that is used exclusively to receive connections from other server instances. On a given server instance, every Always On availability groups or database mirroring connection to any other server instance uses a single database mirroring endpoint.

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