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Detailed Description
The Detailed Picture of Hardware Monitoring
following the execution of the IOSCAN utility, or when managing requests using the Hardware Monitoring Request Manager, the startup client reads each configuration file and creates the monitoring requests defined by the entries in the file. The Hardware Monitoring Request Manager updates the contents of the startup configuration file when you add or modify monitoring requests.
Peripheral Status Monitor (PSM)
The sole purpose of the peripheral status monitor (PSM) is to convert events detected by a hardware event monitor to changes in hardware resource status. This conversion is required for use with MC/ServiceGuard in controlling package failover. When an event occurs, the PSM determines if it is serious enough to warrant a change in hardware resource status to DOWN. If it is, the PSM alerts EMS, which then informs MC/ServiceGuard.
More information about the PSM is included in Chapter 4, “Using the Peripheral Status Monitor.”
Event Monitoring Service (EMS)
The event monitoring service (EMS) provides the framework within which hardware monitoring takes place. EMS manages the monitoring requests created for each monitor. When an event occurs, the associated monitor alerts EMS and passes it an event message. EMS then uses the monitoring request to determine how (or if) the event message should be delivered. EMS manages all hardware event notification.
EMS also provides the graphical interface for creating and managing PSM monitoring requests. Like event monitoring requests, all PSM monitoring requests are managed by EMS.
Other system monitors are available for EMS at additional cost. For more information on EMS and available monitors, see Using EMS HA Monitors
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