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3. Add a Predictive Threshold
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3. Add a Predictive Threshold

  1. Navigate to the template that you desire to modify.

  2. In the template, from the Thresholds table menu, select Add Threshold.

  3. Provide a name for the new threshold and select the HoltWintersFailure threshold type.

  4. Choose the Data Source to which the threshold should be applied.

  5. Specify the parameters for the prediction engine.

    Table 41.2. Predictive Threshold Data Source Threshold Options

    NameDescription

    Rows

    The number of points to use for predictive purposes.

    Alpha

    A number from 0 to 1 that controls how quickly the model adapts to unexpected values.

    Beta

    A number from 0 to 1 that controls how quickly the model adapts to changes in unexpected rates changes.

    Season

    The number of primary data points in a season. Note that Rows must be at least as large as Season.


  6. Click Save to save your changes.

  7. Remove the RRD file or files that correspond to the data source selected in a previous step.

    cd $ZENHOME/perf/Devices
rm device_names/DataSource_DataPoint.rrd

    Note

    Removing the RRD files does result in a loss of historical information.

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2. Prerequisites Home Chapter 42. RANCID Integration