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53.3 Add a Predictive Threshold

VERSION 3  Click to view document history
Created on: Oct 12, 2010 6:10 PM by Zenoss API - Last Modified:  Oct 12, 2010 6:21 PM by Zenoss API

 3. Add a Predictive Threshold

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

  2. From the Thresholds area, click (Add Threshold).

  3. Provide a name for the new threshold and select the HoltWintersFailure threshold type, and then click Add.

  4. Choose the data source to which the threshold should be applied.

  5. Specify the parameters for the prediction engine.

     

    Table 53.2. 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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