Node settings->Monitoring->Network Services
Leading Network Service
Leading network service determines the monitoring strategy of a node. When the node is down the program polls only the leading service to check if a node is up. Other monitored services on the node are not polled until the leading service responds.
When a node is relatively unimportant, you can set a longer check time to lower network traffic.
You can select any network service from the node list to be the leading network service.
Leading network service in standard and simplified monitoring types
In the simplified and standard monitoring types, when the leading network service and all other currently monitored network services on the node become unresponsive (their status is changed to DOWN), the monitoring of other network services on the node is temporarily disabled. In addition, the monitoring of performance counters is disabled for the node as well.
In such situation, only the leading service is polled for the status, according to the check time specified by the user. This limited manner of node monitoring is continued in order to conserve resources, until the leading network service is responsive (i.e. is in UP state). In such case, monitoring of other network services and performance counters is enabled. Furthermore, the leading service check time can be defined over 1 minute.
Leading network service in the extended monitoring type
The extended monitoring allows setting the leading service check time below 1 minute. Furthermore, the check time can be defined along with additional options.
Difference between the monitoring time and check time
The monitoring time is the time interval after which the data necessary in the monitoring process (alerting and/or reporting) is collected by the program.
The check time refers only to the selected leading service. It is the time interval after which the network service, selected as the leading service, is polled for status. By the program default the monitoring time and leading service check time are the same. However, you can define these time intervals separately, even for each monitored node and for different monitoring type.
