HP NonStop G-Series - Manual (Page 53)

Event Delivery Management 53
6 Event Delivery Management
6-1 Managing the Connection
The OVNM product provides facility to protect from loss of any data in case of a network failure. The EMS
Collectors accept event messages from HP NonStop and log them continuously, while the EMS Distributors filter
event messages and pass the messages to the Enterprise operations environment. OVNM is responsible for
collecting HP NonStop system events and then feeding them into the supported Enterprise Management Systems,
like HP Operations Manager (HPOM), Netcool, BMC PATROL, etc.
If the connection between Enterprise Management Server and the HP NonStop Server(s) is lost due to any reason,
the event messages generated by the HP NonStop server(s) are not forwarded to the Enterprise Manager
Message Browser(s). If the connection is lost between the Enterprise Management Server and OVNM, Store and
Forward (SAF) files are used to store the events until the Enterprise Manager services are started. If the
connection is lost between OVNM and the NonStop, after establishing the connection, OVNM sends the auto-
catch-up request to the NonStop agent to recollect the lost messages. This auto-catch-up request to capture lost
messages launches their own dynamic distributors without impacting the flow of other active connection sessions.
OVNM can be used with the Enterprise Manager Operational environment in the following modes for
guaranteed event delivery from the HP NonStop Server to the Enterprise Managers.
• Broadcast Mode
• Primary/Backup Mode
• Mixed Mode
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