Monitoring applications You use the surveillance functionality to monitor the status of StreamServe applications. Surveillance monitors the preferred state of an application. The preferred state of the application is set when the application is started or stopped from Control Center. For example, if you start an application from Control Center, the preferred state is set to Started. However, if applications are started or stopped outside of Control Center, for example from Windows Control Panel, the preferred state does not change. If an application that is monitored and that has a preferred state of Started goes down, you can use the surveillance functionality to try to restart the application. If this is not successful, it is also possible to: • Start an external program, which can try to restart the application. For example, by sending an SNMP trap to a Network Management System (NMS), or by executing a BAT file or shell script. • Send an email to the application domain contact. In this section • Configuring surveillance actions for the host • Configuring surveillance for the application or service gateway • Configuring arguments for external programs or surveillance emails