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15.2 Setup and configuration
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We use SQL Server Management Studio to begin the process of configuring the data collection platform for a SQL Server 2008 instance,1 with the first step being the selection (or creation) of the MDW.
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15.2.1 MDW selection or creation
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Right-clicking Data Collection under the Management node in SQL Server Management Studio allows you to select the Configure Management Data Warehouse menu option, which starts the Configure Management Data Warehouse Wizard. The first wizard step presents two options, as shown in figure 15.2: Create or Upgrade a Management Data Warehouse and Set Up Data Collection. According to the provided option descriptions, if an MDW database does not yet exist, you can select the first option to create an MDW for subsequent server instances to use. Alternatively, the second option allows you to select an existing MDW.
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SQL Server 2005 instances (and earlier) cannot be configured for data collection.
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Setup and configuration
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Figure 15.2 Right-clicking Data Collection and choosing Configure Management Data Warehouse starts the Configure Management Data Warehouse Wizard.
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Although it s possible for each instance to host its own local MDW database, choosing to create it on a centralized, dedicated server (as per the example shown earlier in figure 15.1) provides a number of advantages, particularly in large environments containing many server instances that will be configured for data collection. Among others, the major benefits of a single centralized MDW database include the following: Centralized administration A single MDW database enables simpler administration for actions such as backups and disk space monitoring. Depending on the configured collection sets and upload frequencies, the volume of uploaded data can grow very quickly, so having a single administration point is very beneficial in this regard. Single report source A centralized MDW enables a custom enterprise reporting solution to be configured against a single-source MDW database. Minimal performance impact Offloading the MDW overhead from each of the uploading servers minimizes (and centralizes) the performance overhead of the data collection platform. For the purposes of this example, let s imagine our MDW is yet to be created. Thus, we ll select the first option shown in figure 15.2. The next screen, as shown in figure 15.3, permits the creation of a new MDW by clicking the New button and entering the name, location, and size details. As with the creation of any database, we must consider the initial size and growth factors; an MDW can grow very quickly,2 so avoiding frequent autogrow operations is a vital performance consideration.
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~ 300MB per uploading server per day, depending on collection sets and upload frequency
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Data Collector and MDW
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Figure 15.3 The Configure Management Data Warehouse Wizard permits the creation of a new MDW database.
The next and final step in the initial setup wizard is configuring the MDW security, which involves mapping logins to one of three MDW database roles: mdw_admin, mdw_reader, and mdw_writer. These roles enable control over the two main uses of the MDW: loading data into it and reporting on the data within. Should a central MDW database instance be used by multiple uploading instances, each uploading instance s SQL Agent account would need to be defined as a member of the mdw_writer role, unless the account already has sysadmin membership on the MDW instance. The mdw_reader role is used for accounts requiring reporting access, and the mdw_admin role is a superset of both the reader and writer roles. Once the MDW database has been created, the next step is to set up data collection. In a central MDW installation, the data collection setup process is repeated on each SQL Server instance, each of which would be configured to upload to the recently created MDW database.
15.2.2 Data collection setup
Setting up data collection involves accessing the same wizard we used to create the MDW database. Right-click Data Collection and choose Configure Management Data Warehouse; however, this time select Setup Data Collection from the step shown earlier in figure 15.2. The next step, as shown in figure 15.4, allows you to select the MDW database you ve just created, along with a cache directory. One of the properties of each data
Figure 15.4 After selecting Set Up Data Collection from the Configure Management Data Warehouse Wizard, you can select an MDW database and specify a cache directory for cached collection sets.
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