Monitoring of the pan-European marine data management infrastructure in the framework of EU/FP7 SeaDataNet II project: SeaDataNet monitoring infrastructure

In the context of EU/FP7-funded SeaDataNet II (SDN-II) project that concerns the monitoring of the pan-European infrastructure for Ocean and Marine Data Management, the Hellenic Center for Marine Research (HNODC) has developed and delivered a Network Monitoring System to ensure the "up and running" operation (availability) of computers (hosts) and network services (web services, Authorization and Authentication services, Download services etc) within the SeaDataNet network architecture. This system is able to detect and report failures of devices, services or connections and send messages (alerts) to designated locations to notify system administrators so as to ensure the proper functionality of the services. All events that changing the operational status of the network are recorded and stored in a database. Implementing a proper mathematical formula is able to calculate the availability of the separate SDN-II services as well as the total availability index of the network. The calculation this index is a mandatory key-point for any service provider (including SDN-II) to be able to sign Service Level Agreenets (SLAs).