Microsoft SQL Server 2008 Administration for Oracle DBAs in VS .NET

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Microsoft SQL Server 2008 Administration for Oracle DBAs
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Figure 10-44 Create New Policy dialog box
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Finally, we click OK and the policy is created along with a SQL Server Agent Job that evaluates the policy according to the schedule we defined Figure 10-46 shows the new policy and condition created within SSMS
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Policy Evaluation
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In the previous example, the policy was created using the On Schedule evaluation mode The evaluation modes available are dependent on the type of facet being used Policies have four different evaluation modes:
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10: Scheduling, Automation, and Aler ting
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Figure 10-45 Create New Policy dialog box, Description page
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On Schedule On Demand On Change: Log Only On Change: Prevent All facets support policies using the On Schedule and On Demand evaluation modes On Schedule uses SQL Server Agent to create a job that will evaluate the policy on a scheduled basis On Demand policies are effectively manual policies and are only evaluated when a user explicitly selects a policy for evaluation If the facet being used
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Microsoft SQL Server 2008 Administration for Oracle DBAs
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Figure 10-46 Database Backup Standards Policy and Condition in SSMS
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is exposing properties that when changed are captured by system event tracking or are encapsulated within DDL triggers, then the On Change: Log Only and On Change: Prevent evaluation modes are made available On Change: Log only watches for policy violations as they happen and will record the violation in the SQL Server error log and the Windows application log On Change: Prevent uses DDL triggers to intercept the action to roll back the changes Figure 10-47 shows an example of an On Change: Prevent policy in action The policy prevents a user from creating stored procedures with the prefix sp_ in the name In the example, the attempt to create a new procedure not conforming to the rules is intercepted by the policy engine, the user is given feedback on why their operation failed with a description of the policy and a link to an intranet site for further detail and the user is then notified that their attempt to create the object has failed and the transaction has been rolled back
ON THE JOB
As you may have noticed, all SQL Server system stored procedures start with sp_; therefore, it is strongly recommended that you do not start the names of your own objects with sp_, for two reasons First, the potential exists for naming one of your own procedures with the same name as a system procedure, which may produce undesirable results Second, it may be confusing to anyone who is new to administering the system who may think your user created stored procedure is a system stored procedure
10: Scheduling, Automation, and Aler ting
Figure 10-47 On Change: Prevent policy preventing a policy for being violated
Oracle DBA Q&A
Q: So I guess I could use Policy-Based Management to help implement a SQL Server version of the OFA (Optimal Flexible Architecture) guidelines, which could be proactively enforced A: Yes, you can use Policy-Based Management to describe how your server should be configured and set up, and then the Policy-Based Management engine will be able to alert you to any setup that does not comply with your SQL Server version of the OFA guidelines
Microsoft SQL Server 2008 Administration for Oracle DBAs
Even if a policy is set to be scheduled, it can also be evaluated on an ad hoc basis It can be run by right-clicking the policy in SSMS and selecting Evaluate, which will then run the policy, covering its entire scope as defined in the Targets section of the policy; or you can evaluate a policy against an individual database by right-clicking the database and selecting Policies | Evaluate, as shown in Figure 10-48 Selecting Evaluate presents the user with a dialog box that has all the possible policies that can be run against the database As an example, Figure 10-49 shows the dialog box that s presented when evaluating policies against the AdventureWorks database Each policy has a check box next to it, enabling you to select the policies you are interested in running Once you have selected policies, clicking the Evaluate button will then check the policy against the database Once completed, the dialog box will present the results of the evaluation; a red circle with a white indicates the policy failed, and a green circle with a white check indicates success Figure 10-50 shows that the policy evaluation failed In the Target Details section, the Details column contains a hyperlink that, when clicked, will show the detailed results of the evaluation and will highlight which elements failed and which passed Figure 10-51 shows the detailed view of the policy evaluation
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