HP NonStop G-Series - Manual (Page 356)

Monitoring Event Messages
Guardian User’s Guide — 425266-001
17- 2
Understanding Operator Messages
Understanding Operator Messages
When a subsystem or component of the Compaq NonStop™ Kernel operating system
detects an event that might affect its operation, it generates a message that describes the
event. When an event message is intended to be seen, and perhaps acted upon, it is
converted into displayable text and called an operator message.
Operator messages include system-generated and user-generated messages. System-
generated messages are produced by the NonStop™ Kernel operating system and by
NonStop™ Kernel subsystems as they monitor and manage system resources. User-
generated messages are produced by user-written applications and are not covered in
this guide. You should be familiar with this operator message terminology:
Messages Term Definition
Event message A message sent by the operating system or a reporting application that
describes an event that occurred in a system or network. They do not
appear in a readable format; they are converted into operator messages.
Operator
message Event message that has been converted into readable text. Operator
messages can be displayed in different formats, depending on the
application that formats them.
Collector Event Management Service (EMS) process that accepts event messages
from subsystems and logs them in an event log.
Event log File or set of files maintained by EMS to store event messages generated
by various subsystems.
Distributor
process EMS process that distributes event messages from event logs to
requesting management applications, another collector on this or another
node, or printers, devices, or files. EMS provides several distributors:
•
Consumer distributor
•
Forwarding distributor
•
Printing distributor
•
Compatibility distributor ($Z0)
Consumer
distributor EMS distributor that returns selected event messages to management
applications upon request. The distributor is used by NonStop™ Kernel
applications (such as TSM EMS Event Viewer) and by users to read EMS
or alternate log files and all or specific event messages, depending on
filter specifications loaded to the distributor. The application can take
appropriate action, if necessary, in response to important events.
Forwarding
distributor EMS distributor that sends selected event messages to an EMS collector
on another network node or, if the node has multiple collectors, to an
EMS collector on the same node.
Printing
distributor EMS distributor that sends operator messages to printers, devices,
processes, or files.
Compatibility
distributor ($Z0) Allows downward compatibility with a previous operator process. The
compatibility distributor sends operator messages to a console device
during system load.