ViewPoint Manual

Functional Description
ViewPoint Manual—426801-001
5-23
Event Distribution
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Specific subjects affected
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Event is a critical event (emphasis token) or an action event (action token)
The kinds and number of tokens included in the buffer can vary from subsystem to
subsystem.
Once the buffer is complete, it is sent to the node’s event collector process. The event
collector inserts its own token representing the log time and records all this information
in its current log file.
The current log is a set of files linked together so as to be addressable as a single log.
Typically, an operator has several archived log files in addition to the current log. An
archived log file is a file that was previously part of the current log set. Succeeding
discussions assume that only the current log set is considered unless an archived file is
specifically mentioned.
Event Distribution
Once event messages have been collected in an event log, the next step is to distribute
these messages to the network operators at one or more NCNs. Event distributors are
processes that perform this distribution work.
To allow selectable distribution of event messages, event distributors allow installation
of a filter. Filters consist of processing logic that permits distribution (passing) of
certain kinds of event messages, while inhibiting the distribution of those messages that
do not meet criteria specified in the filter.
Figure 5-17 illustrates the concepts of loading a filter into an event distributor process
and using the filter.
Figure 5-17. Filtering Event Messages
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