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Example: Setting Up Database Mirroring Using Windows Authentication (Transact-SQL)

This example shows all the stages required to create a database mirroring session with a witness using Windows Authentication. The examples in this topic use Transact-SQL. Note that as an alternative to using Transact-SQL steps, you can use the Configure Database Mirroring Security Wizard for database mirroring setup. For more information, see Managing Database Mirroring (SQL Server Management Studio).

Prerequisite

The example uses the AdventureWorks sample database, which uses the simple recovery model by default. To use database mirroring with this database, you must alter it to use the full recovery model. To do this in Transact-SQL, use the ALTER DATABASE statement, as follows:

USE master;
GO
ALTER DATABASE AdventureWorks 
SET RECOVERY FULL;
GO

For information on changing the recovery model in SQL Server Management Studio, see How to: View or Change the Recovery Model of a Database (SQL Server Management Studio).

Example

In this example, the two partners and the witness are the default server instances on three computer systems. The three server instances run the same Windows domain, but the user account is different for the example's witness server instance.

The following table summarizes the values used in this example.

Initial mirroring role

Host system

Domain user account

Principal

PARTNERHOST1

<Mydomain>\<dbousername>

Mirror

PARTNERHOST5

<Mydomain>\<dbousername>

Witness

WITNESSHOST4

<Somedomain>\<witnessuser>

  1. Create an endpoint on the principal server instance (default instance on PARTNERHOST1).

    CREATE ENDPOINT Endpoint_Mirroring
    STATE=STARTED 
    AS TCP (LISTENER_PORT=7022) 
    FOR DATABASE_MIRRORING (ROLE=PARTNER)
GO
--Partners under same domain user; login already exists in master.
--Create a login for the witness server instance,
--which is running as Somedomain\witnessuser:
USE master ;
GO
CREATE LOGIN [Somedomain\witnessuser] FROM WINDOWS ;
GO
-- Grant connect permissions on endpoint to login account of witness.
GRANT CONNECT ON ENDPOINT::Endpoint_Mirroring TO [Somedomain\witnessuser];
GO

  2. Create an endpoint on the mirror server instance (default instance on PARTNERHOST5).

    CREATE ENDPOINT Endpoint_Mirroring
    STATE=STARTED 
    AS TCP (LISTENER_PORT=7022) 
    FOR DATABASE_MIRRORING (ROLE=ALL)
GO
--Partners under same domain user; login already exists in master.
--Create a login for the witness server instance,
--which is running as Somedomain\witnessuser:
USE master ;
GO
CREATE LOGIN [Somedomain\witnessuser] FROM WINDOWS ;
GO
--Grant connect permissions on endpoint to login account of witness.
GRANT CONNECT ON ENDPOINT::Endpoint_Mirroring TO [Somedomain\witnessuser];
GO

  3. Create an endpoint on the witness server instance (default instance on WITNESSHOST4).

    CREATE ENDPOINT Endpoint_Mirroring
    STATE=STARTED 
    AS TCP (LISTENER_PORT=7022) 
    FOR DATABASE_MIRRORING (ROLE=WITNESS)
GO
--Create a login for the partner server instances,
--which are both running as Mydomain\dbousername:
USE master ;
GO
CREATE LOGIN [Mydomain\dbousername] FROM WINDOWS ;
GO
--Grant connect permissions on endpoint to login account of partners.
GRANT CONNECT ON ENDPOINT::Endpoint_Mirroring TO [Mydomain\dbousername];
GO

  4. Create the mirror database. For more information, see How to: Prepare a Mirror Database for Mirroring (Transact-SQL).

  5. On the mirror server instance on PARTNERHOST5, set the server instance on PARTNERHOST1 as the partner (making it the initial principal server instance).

    ALTER DATABASE AdventureWorks 
    SET PARTNER = 
    'TCP://PARTNERHOST1.COM:7022'
GO

  6. On the principal server instance on PARTNERHOST1, set the server instance on PARTNERHOST5 as the partner (making it the initial mirror server instance).

    ALTER DATABASE AdventureWorks 
    SET PARTNER = 'TCP://PARTNERHOST5.COM:7022'
GO

  7. On the principal server, set the witness (which is on WITNESSHOST4).

    ALTER DATABASE AdventureWorks 
    SET WITNESS = 
    'TCP://WITNESSHOST4.COM:7022'
GO