HP EMS HARDWARE S B6191-90028 manual How Does the PSM Work?

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Using the Peripheral Status Monitor

How Does the PSM Work?

How Does the PSM Work?

The PSM converts hardware events detected by the EMS Hardware Monitors to “UP” or “DOWN” status, which is used by MC/ServiceGuard in controlling package failover. Figure 4-1 on page 68 illustrates how the PSM works with the other components of hardware monitoring.

Because hardware event monitors detect and report the occurrence of events rather that resource status, a method is required to alert MC/ServiceGuard when a hardware resource has a status that may impact data availability. The PSM provides this functionality, serving as the interface between the hardware event monitors and MC/ServiceGuard.

Some monitors can determine when a problem has been corrected and the hardware is functioning properly. These monitors automatically alert the PSM when the hardware is fixed, and the PSM will return the state of the hardware to UP. Other monitors do not have the capability of determining when the hardware problem is corrected. With these monitors it will be necessary for the user to use the set_fixed utility to manually return the operational state to UP.

Chapter 4

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Contents Manufacturing Part Number B6191-90028 September EMS Hardware Monitors Users GuideLegal Notices Printing History Page Contents Hardware Monitor Configuration Files Using the Peripheral Status MonitorSpecial Procedures Contents About This Manual Related Web Site Introduction Hardware Monitoring Overview What is Hardware Monitoring?Components Involved in Hardware Monitoring How Does Hardware Monitoring Work?Benefits of Hardware Monitoring Products Supported by Hardware Monitors Tips for Hardware Monitoring Hardware Monitoring Terms Hardware Monitoring TermsTerm Definition Hardware Monitoring Terms Introduction Hardware Monitoring Overview Chapter Installing and Using Monitors Steps Involved Steps for Installing and Configuring Hardware Monitoring Supported System Configuration Installing EMS Hardware MonitorsRemoving EMS Hardware Monitors Disk Arrays Checking for Special RequirementsProduct Model/Product Special Number Requirements Tape Products all supported by the Scsi Tape Devices Monitor Disk ProductsFibre Channel Scsi Multiplexers High Availability Storage SystemsFibre Channel Arbitrated Loop FC-AL Hub Fibre Channel AdaptersProduct Model/Product Special Requirements Number Memory Fibre Channel SwitchSystem Others Interface CardsWhat Is a Monitoring Request? Using Hardware Monitoring RequestsSome Monitoring Request Examples Building a Monitoring Request To run the Monitoring Request Manager, type Running the Monitoring Request ManagerEnabling Hardware Event Monitoring 13 Default Monitoring Requests for Each Monitor Default Monitoring RequestsSeverity Levels Notification Method To list the descriptions of available monitors Listing Monitor DescriptionsTo view or show the current monitoring requests Viewing Current Monitoring RequestsTo add a monitoring request Adding a Monitoring RequestSetting Description 14 Monitoring Requests Configuration Settings15 Event Severity Levels Event Description MC/ServiceGuard Severity Response LevelEvent Severity Levels Example of Adding a Monitoring Request == ADD Comment To modify a monitoring request Modifying Monitoring RequestsVerifying Hardware Event Monitoring Events = Checking Detailed Monitoring StatusSample Event Message Retrieving and Interpreting Event MessagesTo delete a monitoring request Deleting Monitoring RequestsDisabling Hardware Event Monitoring To disable hardware event monitoringDetailed Description Hardware Monitoring Architecture Detailed Picture of Hardware MonitoringHardware Monitoring Request Manager Components from Three Different ApplicationsPolling or Asynchronous? EMS Hardware Event MonitorStartup Client Peripheral Status Monitor PSM Event Monitoring Service EMS1File Locations File LocationsDirectories and Files Description Monitoring Startup Process Startup Process in DetailDisabling Monitoring Event Decoding Asynchronous Event Detection in DetailAsynchronous Event Detection Process Event Polling in Detail FC-AL Hub and FC Switch Polling ProcessesMemory Monitor Polling Monitoring Polling Process Memory Monitor Polling Process Detailed Picture of Hardware Monitoring Chapter Using the Peripheral Status Monitor Peripheral Status Monitor Overview How Does the PSM Work? Peripheral Status Monitor PSM Status PSM ComponentsPSM States PSM Resource PathsHow Does the PSM Work? Chapter To create a package resource dependency Configuring Package Dependencies using SAMResourcepollinginterval Resourceupvalue =UP To create a PSM monitoring request Creating EMS Monitoring Requests for PSMFrom the Actions menu select Add Monitoring Request Determining the Frequency of Events Options Specifying When to Send Event NotifySetting the Polling Interval Polling Interval Monitoring Request ParametersTo set the opcmsg ITO Selecting Protocols for Sending Events Notify ViaOpcmsg ITO Critical Major Minor NormalTo set for email notification To set the Snmp trapTCP and UDP To set the TCP or UDP conditionsAdding a Notification Comment Comment Copying Monitoring Requests To change the monitoring parameters of a request To remove monitoring requests Removing Monitoring RequestsTo view the parameters for a monitoring request Viewing Monitoring RequestsFrom the Actions menu select View Monitoring Request To restore the operating state of a resource to UP Using the setfixed Utility to Restore Hardware UP StateExample 4-1 Example of Using setfixed Using the Peripheral Status Monitor Hardware Monitor Configuration Files Monitor Configuration Files File Format Monitor Configuration File EntriesSetting Values Description File NamesInterval must be a Eventnum must be aFrequency must be a Polling Interval Sample Global Configuration FileEvent Definition Severity Action= Communication Device Sample Monitor-Specific Configuration File#POLLINTERVAL Startup Configuration File Keyword Values Description Startup Configuration File EntriesUDP Default Monitoring Requests Default File EntriesDescription Entry Peripheral Status Monitor PSM Configuration File Considerations for Modifying the PSM Configuration File Monitorresourcename PSM Configuration File FieldsCritical Downseverityope Example File Entries Special Procedures Fibre Channel Arbitrated Loop Hub Monitor Configuring the FC-AL Monitor Configuration File Initial Monitor ConfigurationAdding or Removing an FC-AL Hub Configuration FilesThis setting is required Setting Default Description ValuePSM Configuration File Fibre Channel Switch Monitor Configuring the FC Switch Monitor Configuration File Adding or Removing an FC SwitchChanging the FC Switch Monitoring Configuration 2PSM Configuration File Fields Special Procedures 112 Index 114 115