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Specifying an endpoint name
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I always specify Mirroring as the endpoint name, which standardizes the naming convention for these types of endpoints so that I can easily distinguish them from other types of endpoints.
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Implementing Database Mirroring
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10. On the Witness Server Instance page, connect to the witness server instance the same way you connected to the mirror instance in step 9. Specify the port number and endpoint name, and then select the Encrypt Data Sent Through This Endpoint check box to ensure secure communications. Click Next.
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Configuring endpoints on different instances
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For database mirroring, you must configure the principal, mirror, and witness endpoints on different SQL Server instances.
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11. On the Service Accounts page, you specify service accounts. This step is optional. If all the instances that you are configuring endpoints for have the SQL Server service running under the same service account, you do not have to specify anything here. Otherwise, specify the service account for the SQL Server service on all three instances. Click Next. 12. On the Complete The Wizard page, review the configuration settings that the wizard will implement. If you have any changes to make, click Back until you reach the appropriate page and then make the necessary changes. If the configuration is correct, click Finish. 13. When the wizard completes, click Close. Click OK to close the Database Properties message box. This message box serves to remind you that mirroring does not begin until you click Start Mirroring on the Mirroring page of the Database Properties dialog box for the primary database. Click OK to close the Database Properties Adventure Works dialog box.
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NOTE
Transact-SQL alternative
All the steps you perform within the Configure Database Mirroring Security Wizard are equivalent to connecting to each SQL Server instance and issuing a CREATE ENDPOINT command along with an ALTER ENDPOINT command to change the state to STARTED.
Lesson Summary
Endpoints provide a rich, flexible, and multilayered approach to securing communications. By setting a variety of options for authentication, port number, and encryption, you can create a secure configuration for database mirroring. You can use Transact-SQL to configure endpoints, but the typical approach is to use the Database Properties, Mirroring page of SSMS.
Lesson 3: Establishing Endpoints
Lesson Review
The following questions are intended to reinforce key information presented in this lesson. The questions are also available on the companion CD if you prefer to review them in electronic form.
NOTE
Answers
Answers to these questions and explanations of why each answer choice is right or wrong are located in the Answers section at the end of the book.
1. Which types of endpoints and payloads can you create (Choose all that apply.) A. TCP endpoint with a TSQL payload B. HTTP endpoint with a DATABASE_MIRRORING payload C. TCP endpoint with a DATABASE_MIRRORING payload D. HTTP endpoint with a TSQL payload 2. Which of the following are endpoint options that are required for transactions to be exchanged between principal and mirror databases (Choose all that apply; each answer represents a portion of a solution.) A. STATE configured with the default option B. Port 6083 specified for communications C. COMPRESSSION set to ENABLED D. ROLE set to PARTNER
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Implementing Database Mirroring
Lesson 4: Understanding Operating Modes
You can configure database mirroring for three different operating modes: High Availability, High Performance, and High Protection. The operating mode governs the way transactions are transferred between the principal and the mirror databases as well as the failover processes that are available in the database mirroring session. In this lesson, you learn about each operating mode, the benefits of each, and how database mirroring s caching and transparent client redirect capabilities give it advantages over other availability technologies.
After this lesson, you will be able to:
Explain the differences between each operating mode. Choose the appropriate operating mode for your situation. Explain how database mirroring s caching and transparent client redirect work.
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