User guide

Setting Up Performance Management Threshold Notification
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AlliedView NMS Administration Guide
Thresholds can be associated with Data identifiers for which data collected is of type string. An example is SysDescr. To
monitor a change in system description use String Thresholds.
• Percentage Values
Assume you want to set the number of pages to be loaded in a printer to depend on the Toner level. Moreover, when
the toner level is 80% of the number of pages to be printed, you wish to be notified. To achieve this, you create a
Percentage Threshold with a value 80. Collect data for two Statistics, Toner level and Number of pages in the printer.
Divide the first by the second to find the percentage. If the resulting value exceeds the Threshold value (80), then you will
receive notification. The steps are:
1. Data will be collected for first statistic.
2. When compared with Threshold value, if Threshold type is percentage, for the associated statistic (second statistic)
data will be collected.
3. Both will be divided and result multiplied by 100, thus giving a percentage.
The notification that you receive when the collected value exceeds the Threshold value is in the form of a Threshold Event.
An event is an occurrence of some action. Hence, whenever the Threshold value is exceeded, a Threshold event will be
generated, which will be handled by AlliedView NMS Fault module. Refer to the NMS User Guide for viewing events. Also,
every Threshold event is associated with a Severity to denote the criticality of the situation. For example, a severity of
Critical should indicate that immediate attention is needed on data collection.
You can associate multiple thresholds with a single Statistic. Doing so allows you to control every value collected. For
example, you can say if the collected value is above 10, the severity is minor. If the collected value is above 20, severity is
major. In such a case the following will happen:
1. Until a threshold reaches it's reset value, it will be in that severity state itself. As soon as it reaches the reset value, the
threshold gets reset and waits for the collected data to again exceed its limit.
2. If another threshold exists of lower severity and if the collected data falls in its limits then that threshold will generate the
message.
3. If a threshold exist with higher severity, the higher severity threshold will take precedence and its message will be
displayed. The threshold with lower severity loses its importance and will not be generated until the threshold with a
higher severity reaches reset state.
8.4.2 Add Threshold
To add a Threshold, access the Configuration Collection view, and then select Edit -> Threshold -> Add Threshold. The
following figure appears, showing three tabs, one for each type of threshold. Type long is the default tab. The tabs are for
long, string, and percentage properties. Refer to the following figure.