TAILIEUCHUNG - Microsoft SQL Server 2008 R2 Unleashed- P70

Microsoft SQL Server 2008 R2 Unleashed- P70:SQL Server 2005 provided a number of significant new features and enhancements over what was available in SQL Server 2000. This is not too surprising considering there was a five-year gap between these major SQL Server 2008 is not as much of a quantum leap forward from SQL Server 2005 | 634 CHAPTER 20 Database Mirroring You need to click the Configure Security button on the Mirroring page. This immediately launches the Configure Database Mirroring Security Wizard for the database you have selected AdventureWorks in this example . Figure shows this initial wizard splash page. FIGURE The Configure Database Mirroring Security Wizard for the AdventureWorks database. You must configure all three server instances principal mirror and witness servers for the high-availability mode. The first option that must be indicated is whether you plan to include a witness server instance in your mirroring configuration. You are configuring a high-availability database mirroring configuration synchronous mode with automatic failover so you should select Yes on the wizard dialog shown in Figure you do so because you want to create a full high-availability mode for automated failover. FIGURE Including the witness server instance in the mirroring configuration. Download from Setting Up and Configuring Database Mirroring 635 The next page in the wizard prompts you to decide where to save the security configurations for database mirroring. You have no choice for the principal and mirror server instances their security configuration information must be stored with them. You must also choose the default location for the witness server instance. The wizard then takes you through each server instance in the database mirroring configuration to establish all needed connection information to implement database mirroring. As you can see in Figure this starts with the principal server instance. The wizard should find the endpoint and listener_port values you set up earlier listener_port value 1430 and endpoint name EndPoint4DBMirroring1430 in this example . FIGURE The Principal Server Instance screen of the Configure Database Mirroring Security Wizard. Next comes the specification of the listener and endpoint entry for the mirror .

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