HP D7171A - NetServer - LPr Manual page 3

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HP NetServer Agents
HP NetServer Agents unlock the monitoring capabilities designed into HP NetServers.
These Agents monitor the current state of server subsystems by measuring certain
operating parameters, counting the occurrence of particular events (for example, the
number of read operations performed on a disk drive), and report on the state of critical
functions (such as whether the system cooling fan is operating).
The Agents provide information to management applications and can generate alarm
notifications for the system administrator if significant changes occur in the fault or
performance aspects of system operation. For example, when an Agent detects that the
hard disk drive exceeded a preset threshold, and is likely to fail, then the Agent issues an
alert through SNMP. HP TopTools for Servers receives the alert and immediately issues an
alarm to the system administrator. The process of monitoring and sending alerts is called
the Pre-Failure Monitor Service.
Alerts and Thresholds
The HP NetServer Agents detect the health of the server (and server components) by
measuring and collecting server operating parameters and comparing the measured values
to a set of pre-determined and user-established values called thresholds. A threshold
defines the minimum, maximum, or specific value for a given fault or performance
parameter. If a value of a server parameter falls outside of its threshold, the Agents
immediately generate an alarm that is displayed and can be forwarded to a pager or email
so that the administrator is promptly notified.
All alerts are recorded in the Event Log. The Event Log within the Status Tab displays a
summary of events received by the management system, which can be viewed, deleted,
printed or saved to a text file.
See Figure 1 for an example of the information provided when a memory module is likely to
fail.
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