Glossary | HP HA s Software instruction

Glossary

A-H

alert An event. A message sent to warn a user or application when certain conditions are met.

client The application that creates or cancels requests to monitor particular resources. The consumer of a resource status message. A user of the Resource Monitor framework. This user may browse resources, request status, and make requests to have resources monitored. Examples are MC/ ServiceGuard as it starts a package or the SAM interface to EMS.

event An alert.

I-K

ITO HP OpenView IT/Operations, formerly known as OperationsCenter.

L

logical extent The basic allocation unit for a logical volume is called a logical extent. For mirrored logical volumes, either two or three physical extents are mapped for each logical extent, depending on whether you are using 2- way or 3-way mirroring.

logical volume A collection of disk space from one or more disks. Each collection appears to the operating system as a single disk. Like disks, logical volumes can be used to hold ﬁle systems, raw data areas, dump areas, or swap areas. Unlike disks, logical volumes can be given a size when they are created, and a logical volume can later be expanded or reduced. Also, logical volumes can be spread over multiple disks.

LUN (Logical Unit Numbers) A logical disk device composed of one or more physical disk mechanisms, typically conﬁgured into a RAID level.

LVM (Logical Volume Manager) Manages disks in volume groups, and allows you to create logical and physical volume groupings.

M

MIB (Management Information Base). A document that describes objects to be managed. A MIB is created using a grammar deﬁned in “Structure of Management Information” (SMI) format. This grammar concisely deﬁnes the objects being managed, the data types these objects take, descriptions of how the objects can be used, whether the objects are read-only or read-write, and identiﬁers for the objects.

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HP HA s Software manual Glossary

Contents

B5735-90001 August Using EMS HA Monitors Legal Notices Contents Monitoring Network Interfaces Monitoring Cluster Resources Troubleshooting Monitoring System ResourcesGlossary Contents Printing History Printing Date Part Number EditionB5735-90001 Page Publications PrefacePage Installing and Using EMS What are EMS HA Monitors? Event Monitoring Services High Availability Monitors Chapter Role of EMS HA Monitors in a High Availability Environment Installing EMS HA Monitors Installing and Removing EMS HA Monitors Removing EMS HA Monitors Event Monitoring Service Resource Class Hierarchy Using EMS HA MonitorsStatus AvailMB Pvpvlink Event Monitoring Service Screen Screen Selecting a Resource to Monitor Using Wildcards Monitoring Request Parameters Creating a Monitoring Request How Do I Tell EMS When to Send Events? Which Protocols Can I Use to Send Events? What is a Polling Interval? What is a Notiﬁcation Comment? Copying Monitoring Requests Modifying Monitoring RequestsRemoving Monitoring Requests Service EMS Conﬁguring MC/ServiceGuard Package Dependencies Package Conﬁguration Screen Package Resource Dependencies Screen Resource Parameters Screen Using EMS HA Monitors Monitoring Disk Resources Monitoring Disk Resources Disk Monitor Resource Class Hierarchy Disk Monitor Reference Interpreting Physical Volume Summary Physical Volume Summary Disk Monitor Reference Interpreting Physical Volume and Physical Volume Link Status Physical Volume and Physical Volume Link Status Interpreting Logical Volume Summary Logical Volume Summary Interpreting Logical Volume Status Logical Volume StatusLogical volume is inactive Logical volume is DOWN, a complete copy of the data is not Interpreting Logical Volume Copies Logical Volume Number of Copies Rules for Using the EMS Disk Monitor with MC/ServiceGuard Rules for Using the EMS Disk Monitor with MC/ServiceGuard Pvsummary Calculations Case Conclusion State Rules for RAID Arrays Adding PVGs to Existing Volume Groups Creating Volume Groups on Disk Arrays Using PV Links # mkdir /dev/vgdatabase Creating Logical Volumes Rules for Mirrored Individual Disks Creating Disk Monitoring Requests Disk Monitoring Request Suggestions Parameters When Disks Fail RAID Array Example Resources to Monitor for RAID Arrays Pvgup Return Mirrored Disks Example Resources to Monitor for Mirrored Disks Monitoring Parameters Resource Notify Condition Option Example for Interpreting the pvsummary for Mirrored Disks Resources to Monitor for Lock DisksNumber Pvsummary Valid Meaning Value Devices Resource Monitoring Parameters Notify Condition Option Resources to Monitor for Root Volumes Monitoring Cluster Resources Cluster Monitor Reference Cluster Monitor Resource Class HierarchyCluster Interpreting Custer Status Cluster Status Interpreting Node Status Node Status Interpreting Package Status Package Status Creating Cluster Monitoring Requests Monitoring Network Interfaces Network Monitor Reference Network Monitor Resource Class HierarchyInterpreting LAN Interface Status Chapter Conﬁguring Network Monitoring Requests Net/interfaces/lan/status/LANname When value is30 sec Hour Monitoring System Resources System Resource Monitor Class Hierarchy System Monitor Reference Number of Users Interpreting Number of UsersResource Name Value Range Interpretation Job Queues Interpreting Job QueuesResource Name Value Interpretation Range Filesystem Available Space Filesystem Available SpaceResource Name Creating System Resource Monitoring Requests 6Troubleshooting EMS Directories and Files Etc/opt/resmon/log EMS Logging Logging and tracing EMS Tracing System Performance Issues Network Performance IssuesPerformance Considerations Testing Disk Monitor Requests Testing Monitor RequestsTesting Cluster Monitor Requests Testing Network Monitor Requests Making Sure Monitors are Running Glossary Notiﬁcation See alert Glossary Glossary Index Index Index