The following attributes affect how the VCS agent framework reacts to problems with individual resources before informing the fault to the VCS engine.
The RestartLimit attribute defines whether VCS attempts to restart a failed resource before informing the engine of the fault.
If the RestartLimit attribute is set to a non-zero value, the agent attempts to restart the resource before declaring the resource as faulted. When restarting a failed resource, the agent framework calls the Clean function before calling the Online function. However, setting the ManageFaults attribute to NONE prevents the Clean function from being called and prevents the Online function from being retried.
The OnlineRetryLimit attribute specifies the number of times the Online function is retried if the initial attempt to bring a resource online is unsuccessful.
When the OnlineRetryLimit set to a non-zero value, the agent framework calls the Clean function before rerunning the Online function. Setting the ManageFaults attribute to NONE prevents the Clean function from being called and also prevents the Online operation from being retried.
The ConfInterval attribute defines how long a resource must remain online without encountering problems before previous problem counters are cleared. The attribute controls when VCS clears the RestartCount, ToleranceCount and CurrentMonitorTimeoutCount values.
The ToleranceLimit attribute defines the number of times the Monitor routine should return an offline status before declaring a resource offline. This attribute is typically used when a resource is busy and appears to be offline. Setting the attribute to a non-zero value instructs VCS to allow multiple failing monitor cycles with the expectation that the resource will eventually respond. Setting a non-zero ToleranceLimit also extends the time required to respond to an actual fault.
The FaultOnMonitorTimeouts attribute defines whether VCS interprets a Monitor function timeout as a resource fault.
If the attribute is set to 0, VCS does not treat Monitor timeouts as a resource faults. If the attribute is set to 1, VCS interprets the timeout as a resource fault and the agent calls the Clean function to shut the resource down.
By default, the FaultOnMonitorTimeouts attribute is set to 4. This means that the Monitor function must time out four times in a row before the resource is marked faulted.