To set or get the threshold rule scan period, use the following rhino-console commands or MBean operations.

Note
What is a rule-scan period?

A threshold-alarm rule-scan period determines when Rhino’s threshold-rule scanner evaluates active threshold-alarm rules.

The scan period must be set to a valid non-zero value for Rhino to evaluate the rules. At the beginning of each scan period, Rhino evaluates each active threshold-alarm rule as follows:

  • If the rule’s trigger condition is true and the trigger period is 0, the rule triggers and raises its alarm.

  • The first time the threshold-rule scanner finds a rule’s trigger condition to be true, with a trigger period greater than 0, it records the time. Thereafter, when it evaluates the rule, if the trigger condition continues to be true, when the accumulated time exceeds the rule’s trigger period, the rule triggers and raises its alarm. (If the rule evaluates to false at any time, the rule scanner discards any accumulated time from while it was true.)

(The same process applies to the reset conditions once a rule has been triggered.)

Console command: setthresholdrulescanperiod

Command

 
setthresholdrulescanperiod <period>
  Description
    Set the threshold alarm rule scan period, measured in ms.  Must be > 500 or 0 to
    disable rule checking

Example

To set the threshold rule scan period to 30000ms (30s):

$ ./rhino-console  setthresholdrulescanperiod 30000
Threshold rule scan period set to 30000ms

To disable threshold rule scanning:

$ ./rhino-console  setthresholdrulescanperiod 0
Threshold rule scanning disabled

MBean operation: setScanPeriod

MBean

ThresholdRuleManagementMBean

Rhino operation

 
public void setScanPeriod(int scanPeriod)
    throws ConfigurationException, ValidationException;

The scan period is measured in milliseconds.

Console command: getthresholdrulescanperiod

Command

 
getthresholdrulescanperiod
  Description
    Get the threshold alarm rule scan period

Example

 
$ ./rhino-console  getthresholdrulescanperiod
Threshold rule scan period set to 30000ms

MBean operation: getScanPeriod

MBean

ThresholdRuleManagementMBean

Rhino operation

 
public int getScanPeriod()
  throws ConfigurationException;

The scan period is measured in milliseconds.
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Rhino Version 3.1