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Figure 8.11 When you re creating a policy, after choosing a condition, you select the condition target and evaluation mode.

Figure 8.12 SQL Server Management Studio includes visual aids to make policy violations stand out. In this case, the AdventureWorks2008 database has failed a policy.

Fig 2-7

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At this point, the policy is created and will run according to the defined schedule. One of the really useful features of the new SQL Server Management Studio is that it s aware of policy failures. As shown in figure 8.12, any server and/or database that has failed a policy will be marked with a red cross icon. In this example, the AdventureWorks2008 database is set to AutoShrink and AutoClose, contrary to the policy we just created. To correct the policy failure, rather than manually setting these two database properties we can simply right-click the database and choose Polices > Evaluate to view the policy failure, and then click Apply to force the server s properties to comply with the policy conditions. Once created, policies can be easily exported, and doing so enables a number of important management functions.

Policies can be exported in one of two ways. First, you can simply right-click an existing policy and choose Export Policy. The resulting dialog box allows you to select a location in which to save the XML-based policy file. The other method is based on an instance facet. By right-clicking on a registered SQL Server instance, you can choose Facets. The View Facets window allows you to view the instance properties on a facet-by-facet basis, but more important, you can choose the option Export Current State as Policy. Figure 8.13 shows the Server Performance facet of the BNE-SQL-PR-01\SALES instance. By clicking the Export Current State as Policy button, we re able to create a new policy file based on the Server Performance properties of this server. The importance of this function can t be overstated; essentially, we re able to configure a single server to be exactly how we want all servers to be configured, and then create policies based on the individual facets. Doing so makes the configuration of multiple servers very simple, a process we ll cover next.

Figure 8.13 The Export Current State as Policy button allows us to create a policy file based on an instance s facet configuration.

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In opening this chapter, we discussed the challenges faced by a DBA in maintaining consistent best practice configuration across many SQL Server instances. We ve looked at the new policy-based management feature and how it can be used to create, import, and evaluate policies. Although the new feature is unquestionably useful, there still remains a significant challenge in being able to deal with instances running into the hundreds or thousands, particularly when the instances are spread across a number of categories such as production, test, and development, each of which may have individual configuration requirements. What s really needed is a way of defining a template server for each environment, and then applying the configuration of that server to all other servers in that category, for example, make all those production servers just like this one. Using policy-based management in conjunction with central management servers allows us to do exactly that. Before we look at combining these two features, let s start with a look at central management servers.

In SQL Server 2005 we could use the registered servers feature to register and group frequently managed servers. For example, we could create a production group, containing multiple production servers, and a test group containing multiple test servers. By exporting the registration information to file, DBAs could import it and quickly see the same groups and servers in their copy of SQL Server Management Studio.

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