Figure 5-22. The Performance Rule Type dialog in Microsoft Word

Maker Data Matrix 2d barcode in Microsoft Word Figure 5-22. The Performance Rule Type dialog

Figure 5-22. The Performance Rule Type dialog
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As with the event rules, we ll look at all the tabs in turn, but we ll focus only on the tabs not yet discussed. The General, Schedule, Alert, Alert Suppression, Reponses and Knowledge Base tabs are not specifically covered in this section, as they are addressed in the earlier Event Rule Options section.
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The Data Provider Tab
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The Data Provider tab (shown in Figure 5-23) contains the same options as the Data Provider tab of the Event Rule Properties dialog. The difference to note is with the actual provider itself. Whereas with the event rules, the providers were log files and timed events, with performance rules, they are operating systems and their associated application performance counters, which have been previously added into the providers container in the Administrator Console.
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Figure 5-23. The Data Provider tab of the Performance Measure Rule Properties dialog
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The Criteria Tab
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You use the Criteria tab (shown in Figure 5-24) to specify a particular performance counter, instance, or agent to collect the data from. This tab is not often used since most performance rules are configured to apply to all agents.
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Figure 5-24. The Criteria tab of the Threshold Rule Properties dialog
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Click the Advanced button on the Criteria tab (see Figure 5-4) to get to the Advanced Criteria dialog, which will show you a portion of the event description. You can see the rest of the description by moving the separator between the Condition and Value separators in the header with your mouse.
The Threshold Tab
Figure 5-25 shows the options on the Threshold tab that you can use to create threshold rules. You can specify options such as threshold values and the number of samples to average against. You can also specify overrides for the
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threshold values (rule and threshold overrides are explained in the Rule Overrides section later in the chapter).
Figure 5-25. The Threshold tab of the Threshold Rule Properties dialog
Alert Rules
Now that we have looked at event and performance rules, we will focus attention on the third type of MOM rule: the alert rule. You use the alert rule to monitor for alerts that appear in MOM (generated either by event rules, performance rules, or directly by a MOM script). These rules are most commonly used to send an SMTP mail response or paged response to a notification group for alerts generated by rules in a specific rule group. The reason for using alert rules is to maintain manageability within MOM. Configuring each event and performance rule to send an SMTP mail or page is entirely possible, but not particularly easy to manage, since every rule would need to be configured individually. For this reason, alert rules are used. As mentioned previously, a single alert rule can be configured to send SMTP mails or paged responses for many individual event
CHAPTER 5 s RULE C R EATION
or performance rules, making the MOM rule base far easier to manage (especially when you consider that a large rule base can easily have in excess of 5,000 active rules). As with the event and performance rules, we will show you how to use the options in each tab.
The General Tab
Figure 5-26 shows the General tab. This tab mostly contains information that cannot be changed, such as the rule GUID and the rule path. You must click the Set Criteria button to get to the Set Override Criteria dialog (see the Rule Overrides section later in the chapter).
Figure 5-26. The General tab of the Alert Rule Properties dialog
The Alert Criteria Tab
The Alert Criteria tab (shown in Figure 5-27) is the most important tab of the Alert Rule Properties dialog. You can use it to configure which rule groups the alert rule applies to. You can also use it to specify the severity and source of the alert to be matched by the rule.
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Figure 5-27. The Alert Criteria tab of the Alert Rule Properties dialog
The most common setting for this rule is to leave the from alert source check box unchecked. Doing so allows you to catch alerts from all sources and simply use the severity to match. The alternative approach is to check the only match alerts generated by rules in the following group box while leaving the boxes for the first two Match alerts options blank. Clicking the Browse button will take you to the Select Rule Group dialog, as shown in Figure 5-28. In this figure, the branch tree for Operations Manager 2005 has been expanded into a subtree. Choose an item for further expansion to make your selection. You can click the Advanced button on the Alert Criteria tab (see Figure 5-27) to get to the Advanced Criteria dialog, in which you can specify more advanced and specific criteria. Figure 5-29 shows the Advanced Criteria dialog.
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