HP EMS HARDWARE S B6191-90028 Event Polling in Detail, FC-AL Hub and FC Switch Polling Processes

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Detailed Description

The Detailed Picture of Hardware Monitoring

Event Polling (in Detail)

The following is the process used for gathering event information using polling. The polling process is illustrated in Figure 3-4 on page 62.

1.At the interval defined by the polling value in the monitor configuration file, the monitor communicates with all the devices it is currently monitoring. The monitor sends pass-thru commands to all SCSI devices, and uses the appropriate protocol for other types of devices. The exact type and sequence of communication used during a polling operation is monitor-specific.

2.Each device responds to the message from the monitor by returning data indicating its status. The information returned in response to polling is not entered in the raw error log.

3.The monitor interprets the information from the device to determine if an event should be reported. If an event should be reported, the monitor passes the event message to EMS.

4.EMS uses the current monitoring requests for the monitor to determine what action to take. Based on the requests, the event is reported using the specified notification method(s).

FC-AL Hub and FC Switch Polling Processes

Unlike the other EMS hardware monitors, the FC-AL hub monitor and FC switch monitor use SNMP to gather information from the hubs or switches they are monitoring. Using the hub or switch IP addresses defined in the hub or switch configuration files, the monitor polls the devices at the defined polling interval (60 minutes by default) using SNMP.

The reporting of events is handled in the same way as all other monitors. Event information gathered by the hub and switch monitors does not get written to the raw error log, and the hub and switch monitors do not act as a decoder for logtool.

Memory Monitor Polling

The memory monitor polling process uses different components to retrieve event information. The memory monitor polling process is illustrated in Figure 3-5 on page 63.

1.At regular intervals (default 60 minutes) the memlogd daemon polls the memory hardware.

2.If a single-bit error is detected, memlogd uses the values from the memory configuration file to determine the severity of the error, and then passes the appropriate event message to the memory monitor.

The error is also logged in memlog, which can read using logtool. All decoding of memory error messages is performed by memlogd.

3.The memory monitor determines if the event should be reported. If the event should be reported, the monitor passes the event message to Event Monitoring Service (EMS).

4.EMS uses the current monitoring requests for the memory monitor to determine what action to take. Based on the requests, the event is reported using the specified notification method(s).

Chapter 3

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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 States PSM ComponentsPSM Resource Paths PSM StatusHow 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 Setting the Polling Interval Polling Interval Specifying When to Send Event NotifyMonitoring Request Parameters Determining the Frequency of Events OptionsOpcmsg ITO Selecting Protocols for Sending Events Notify ViaCritical Major Minor Normal To set the opcmsg ITOTCP and UDP To set the Snmp trapTo set the TCP or UDP conditions To set for email notificationAdding 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 Setting Values Description Monitor Configuration File EntriesFile Names File FormatInterval must be a Eventnum must be aFrequency must be a Event Definition Sample Global Configuration FileSeverity Action Polling Interval= 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
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