Duplication event filter

In addition to the options that are available in the simple filters, duplication event filters ignore duplicate events.

You can use this filter in two ways: with or without specifying the number of times to ignore an event (Count).

To specify only a time range (Interval), the Count setting must be set to zero (Count = 0). The first occurrence of an event that meets the filter criteria triggers associated actions and starts a countdown of the interval. For example, if you specify a 10-second interval, a 10-second timer starts when an event meets the filtering criteria. Because Count is set to 0, all other instances of an event that meets the criteria do not trigger associated actions during the interval.

If you also specify a number of times to ignore an event (Count), it applies within the specified time range (Interval). After the first occurrence of an event that meets the filtering criteria, the Count setting specifies the number of times an event must meet the criteria again before associated actions are triggered.

For example, if you set Count to 9, an event meeting the criteria is allowed to occur nine times within the interval. When an event meets the criteria for a tenth time within the interval, the associated actions are triggered, the count is reset, and the interval is reset.

For the duplication filter to trigger the associated event actions a second time, the count must be exceeded within the reset interval. For example, if Count = 3 and Interval = 5 minutes, the event action is invoked for the fourth occurrence of the event that occurs within 5 minutes. Then, the count and interval are reset. A fourth occurrence of the event must occur in a 5-minute interval again.

This filter is useful in managing the processing of frequently generated events. For example, you can define a duplication filter to filter on the occurrence of an offline event and define a corresponding event action to forward the event to IBM® Systems Director Server. Depending on the criteria that you define, only the first event announcing that the system is offline is processed, and all other instances in which an event meets the filtering criteria are discarded until the Count value is exceeded during the specified interval.

Related concepts

Events that are available for filtering
Simple event filter
Exclusion event filter
Threshold event filter
Related tasks

Selecting specific events for filtering
Related reference

Event Filter Builder window
Event Filter Builder window: Category page
Event Filter Builder window: Day and Time page
Event Filter Builder window: Event Text page
Event Filter Builder window: Event Type page
Event Filter Builder window: Extended Attributes page
Event Filter Builder window: Sender Name page
Event Filter Builder window: Severity page
Event Filter Builder window: System Variables page
Event Filter Builder window: Frequency page

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