Specifying when to send Event Notifications

When you create a request, you specify the conditions under which you want to collect resource status values. While the monitor may be polling disks every five minutes, for example, you may only want to be alerted when something happens that requires your attention. Specify these conditions in the Notify area of the Monitoring Request Parameters screen. Here are the terms under which you can be notified:

Table 2-1 Options to specify when Event Notifications have to be sent

When value is ...

You define the conditions under which you wish to be notified for a particular resource. Choose an operator (=, not equal, >, >=, <, <=) and one of the possible values returned by the monitor. The content of the value field varies depending upon the resource monitored. The value field might display as a list box or a blank field.

If a list box displays, use the scroll bar and select from the list. If a numeric field displays, type in a value.

When value changes

This sends notification every time a resource value changes. Typically this is used for resources whose values change infrequently. Change here means any change. For example, you could receive notification every time the number of mirrored copies of data changes, whether it is from 2 to 1 or from 1 to 2.

At each interval

This sends notification at each polling interval. It is commonly used for reminders or for gathering data for system analysis. Use this for only a small number of resources at a time, and with long polling intervals of several minutes or hours; there is a risk of affecting system performance.

To set an event trigger:

Select from the listed options in the Notify area (When value is..., When value changes, or At each interval).
Asynchronous monitors are event-driven, rather than polled. They generate messages as events occur. Therefore, if the request is for an asynchronous monitor, only the When value is... option is available.




	NOTE: Updated monitors may have new status values that change the meaning of your monitoring requests, or generate new alerts. For example, assume you have a request for notification, if status > 3, for a resource with a values range of 1 through 7, you will receive alerts each time the value equals 4, 5, 6, or 7. If the updated version of the monitor has a new status value of 1 through 8, you will also see alerts when the resource equals 8. You can use emscli to specify when event notifications have to be sent when adding or modifying a monitoring request. For more information, refer to the emscli (1m) manpage.

Specifying when to send Event Notifications

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