Managing High Availability • Chapter 6 217 In the example shown in Figure 6.12 an existing Resource Group was selected. This Resource Group was created before the SQL Server 2008 installer was launched and this Resource Group has the disks already located in it. New & Noteworthy… Creating Clustered Resource Group During Installation The ability to create the cluster resource group and select the disks for the Resource Group during the SQL Server 2008 installation is a new feature. In prior versions of Microsoft SQL Server you had to manually create the Resource Group and move the hard drives into the resource group. This addition of this feature into the SQL Server installer is a huge plus for SQL Server. By placing this functionality directly into the SQL Server installer as DBAs we now need to rely less on the system administrators who assemble the servers and cluster the Windows operating system to set up the resource groups and hard drives. We can now, without having any additional knowledge of the Windows Cluster Administrator tool, set up the SQL Server quickly and easily in a Windows Cluster. 218 Chapter6•ManagingHighAvailability On the next screen select the disks that you wish to use for the SQL Server. You should select any and all hard drives that you will be using for the SQL Server. Additional hard drives can be added later through the Cluster Manager. As you can see in Figure 6.13 only disks that do not have other resources dependent on them are available for use by the SQL Server. In this case the Q drive is in use as the quorum and by the MSDTC service. The Q drive can be used by both of these because both of them are in the same Resource Group. Ex a m Wa r n i n g Microsoft loves to test on new technology and features. The fact that this is new means that it is more likely to be on the exam. Figure 6.12 Cluster Resource Group Screen ManagingHighAvailability•Chapter6 219 On the next screen you select the IP addresses you will be using for the clustered SQL Server instance. You can select each network that is set up on the cluster and configure a separate IP address for each network. In the example shown in Figure 6.14 there are two networks shown. One is the public network, which is the network that the client computers will connect to the instance. The other is the private network, which is the network that the nodes in the cluster use to talk to each other. The names that are shown are the names of the network connections in the network control panel. Figure 6.13 Cluster Disk Selection 220 Chapter6•ManagingHighAvailability The final cluster page is the Cluster Security Policy screen. This screen will be different depending on the operating system installed, and the domain functional level of your Windows domain. If you are installing SQL Server 2008 on a Windows 2008 operating system and the domain functional level is above Windows 2000 mixed, then you will see the screen as shown in Figure 6.15. If you are install- ing on a Windows 2003 operating system or a Windows 2008 operating system and your domain functional level is Windows 2000 mixed mode or lower, then the radio buttons will not be displayed as your only option will be to use the domain groups. If you are using Windows 2008 to host your cluster you have the option of using DHCP for your SQL Server. If this option is available to you, a check box will be shown in the grid which allows for DHCP. If the installer determines that DHCP is not an option for you, then it will not show you the check box. The options allow you to select how you will control which accounts are able to run the SQL Services. It is recommended to use the new service SIDs functionally, but the legacy option of using domain groups is still available as an option. Figure 6.14 Cluster Network Configuration ManagingHighAvailability•Chapter6 221 If you are using the domain groups option and you have just created the domain groups shortly before running the SQL Server installer, you may receive an error saying that the domain group or groups do not exist when they do. This is normal as the domain group simply has not replicated to all the domain controllers in the domain. An example of this error is shown in Figure 6.16. Depending on how your domain is configured it could take from a few minutes to over an hour for the domain groups to replicate to all your domain controllers. Figure 6.15 Cluster Security Policy Figure 6.16 Cluster Security Policy Error Message . Installation The ability to create the cluster resource group and select the disks for the Resource Group during the SQL Server 2008 installation is a new feature. In prior versions of Microsoft SQL Server. have other resources dependent on them are available for use by the SQL Server. In this case the Q drive is in use as the quorum and by the MSDTC service. The Q drive can be used by both of these. network. In the example shown in Figure 6.14 there are two networks shown. One is the public network, which is the network that the client computers will connect to the instance. The other is the