SQL Server’s Policy-Based Management (PBM) is a powerful tool that allows database administrators to enforce and maintain database configuration policies across their SQL Server infrastructure. PBM provides a centralized way to create, evaluate, and enforce policies across one or more SQL Server instances in a consistent and automated manner.
To use PBM to manage database configuration policies, you need to follow these steps:
1. Create a Policy Management Facet:
The first step is to create a Policy Management Facet that will hold the policies. The Policy Management Facet is essentially a container that defines the scope of policies. It can be created and managed through SQL Server Management Studio (SSMS) or via T-SQL. A facet is a collection of properties that is relevant to the item being managed; for example, a database or a server. You can create a policy management facet by either using the SSMS object explorer or using the CREATE FACET statement in T-SQL.
2. Create a Policy:
Once the Policy Management Facet is in place, the next step is to define policies that will be used to manage the configuration settings. A policy is a set of conditions and actions that are used to ensure that a certain aspect of database configuration is managed according to the requirements of your organization. For example, you can design a memory policy to ensure that SQL Server allocates enough memory to meet the requirements of the workload. You can create a policy by using SSMS or T-SQL. To create a policy in SSMS, navigate to the Management folder, right-click on Policy Management, and select New Policy.
3. Define Conditions:
Once the policy is created, you need to define the conditions that must be met to ensure that the policy is enforced. In PBM, conditions are expressed as a combination of logical expressions, operators, and values that define the requirements of the policy. For instance, the memory policy condition can be set to ensure that the minimum memory setting is 4GB.
4. Set Evaluation Mode:
After the conditions are defined, you can set the evaluation mode that will be used to determine if the policies are compliant or not. PBM supports three evaluation modes: On Demand, On Schedule, and On Change. On Demand means that policies are evaluated when you request it. On Schedule means that policies are evaluated according to a schedule. On Change means that policies are evaluated when a specific event occurs, such as a change in server configuration.
5. Define Actions:
Now that you’ve defined conditions and set evaluation modes, the next step is to define what actions should be taken when a policy is not in compliance. You can define multiple actions for each policy; for example, email a notification to the administrator, do nothing, run a script or remediation.
6. Test and Deploy Policies:
Once policies have been created, their conditions are defined and evaluation modes are set, and actions have been defined, the next step is to test the policies. The best approach is to test policies in a staging environment before applying them to production. When you are ready to deploy policies, you can either push them to target servers manually or automate the deployment through PBM.
In conclusion, Policy-Based Management is a powerful tool that enables database administrators to define, enforce, and manage configuration policies across multiple SQL Server instances. By following the above-mentioned steps, administrators can ensure that their databases are configured according to organization policies and compliance requirements.