OVNM 5.3 - Operations Agent for NonStop Event Management Guide for UNIX

Appendix A 47
Appendix A
Filtering Events Using EMS Filters
This section provides information about how to control the message flow through EMS filters.
Every HP NonStop server can have more then one distributor. Every distributor can use one or more collector and
every EMS collector and distributor (except the compatibility distributor) can use one or more filters to determine
whether or not to forward specific event messages to their destinations. These filters can select messages in a
way that is as detailed and complex as you care to make it. For example, you can design an alternate collector
that filters out all events of a certain type from its event log, a forwarding distributor that forwards only critical
event messages, a printing distributor that prints only action event messages, and a consumer distributor that
returns only Pathway event messages.
By default, OVNM distributors use the PASSALL filter, which passes all the messages, which are then forwarded
to the HP Operations Manager console.
In order to establish a selective display of messages to the HP Operations Manager console, use the following
methods:
1. Modify the PASSALL filter.
2. Write your own filter and use it in the Event server.
Appendix A