HP HA s Software manual Resources to Monitor for Mirrored Disks, Mirrored Disks Example

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Monitoring Disk Resources

Creating Disk Monitoring Requests

Resources to Monitor for Mirrored Disks

This section is valid for mirrored disks created with MirrorDisk/UX. Mirroring is required to be PVG-strict if you are using the disk monitor. Mirrored conﬁgurations that are not PVG-strict will not give you a correct pv_summary.

To adequately monitor mirrored disks, create requests for the following resources for all volume groups on a node:

/vg/vgName/pv_summary

vg/vgName/pv_pvlink/status/* vg/vgName/lv_summary vg/vgName/lv/copies/*

This gives you summary status of all physical volumes in a volume group. A high availability system must be conﬁgured PVG strict. If not, pv_summary cannot accurately determine disk availability.

This gives you the status of each physical disk and links.

This gives you the status of data availability for logical volumes.

This gives you the total number of copies of data currently available.

Figure 2-5 represents two nodes with 2-way mirrored conﬁguration with 10 disks on 2 busses. Both copies are in a single volume group. Assume you want to be notiﬁed when any physical device fails, and when you only have one copy of data, or when there is an MC/ServiceGuard failover. To conﬁgure this last request, you must duplicate your MC/ServiceGuard package dependency. See Chapter 1 “Conﬁguring MC/ServiceGuard Package Dependencies”.

Figure 2-5

Mirrored Disks Example

node1

/dev/dsk/c0t7d0

/dev/vg01

/dev/dsk/c0t8d0

/dev/dsk/c0t9d0

/dev/dsk/c0t10d0

/dev/dsk/c0t11d0

node2

/dev/dsk/c1t7d0

/dev/dsk/c1t8d0

/dev/dsk/c1t9d0

/dev/dsk/c1t10d0

/dev/dsk/c1t11d0

Chapter 2

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Image 53

Contents B5735-90001 August Using EMS HA MonitorsLegal Notices Contents Monitoring Network Interfaces Monitoring Cluster ResourcesGlossary TroubleshootingMonitoring System Resources Contents B5735-90001 Printing HistoryPrinting Date Part Number Edition Page Publications PrefacePage Installing and Using EMS What are EMS HA Monitors? Event Monitoring Services High Availability MonitorsChapter Role of EMS HA Monitors in a High Availability Environment Installing EMS HA Monitors Installing and Removing EMS HA MonitorsRemoving EMS HA Monitors Event Monitoring Service Resource Class Hierarchy Using EMS HA MonitorsStatus AvailMB PvpvlinkEvent Monitoring Service Screen Screen Selecting a Resource to MonitorUsing Wildcards Monitoring Request Parameters Creating a Monitoring RequestHow 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? Removing Monitoring Requests Copying Monitoring RequestsModifying Monitoring Requests Service EMS Conﬁguring MC/ServiceGuard Package DependenciesPackage 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 ReferenceInterpreting Physical Volume Summary Physical Volume SummaryDisk Monitor Reference Interpreting Physical Volume and Physical Volume Link Status Physical Volume and Physical Volume Link StatusInterpreting Logical Volume Summary Logical Volume SummaryInterpreting Logical Volume Status Logical Volume StatusLogical volume is inactive Logical volume is DOWN, a complete copy of the data is notInterpreting Logical Volume Copies Logical Volume Number of CopiesRules 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 ArraysAdding 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 ArraysPvgup Return Mirrored Disks Example Resources to Monitor for Mirrored DisksMonitoring 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 OptionResources to Monitor for Root Volumes Monitoring Cluster Resources Cluster Cluster Monitor ReferenceCluster Monitor Resource Class Hierarchy Interpreting Custer Status Cluster StatusInterpreting Node Status Node StatusInterpreting Package Status Package StatusCreating Cluster Monitoring Requests Monitoring Network Interfaces Interpreting LAN Interface Status Network Monitor ReferenceNetwork Monitor Resource Class Hierarchy Chapter Conﬁguring Network Monitoring Requests Net/interfaces/lan/status/LANname When value is30 sec HourMonitoring System Resources System Resource Monitor Class Hierarchy System Monitor ReferenceResource Name Value Range Interpretation Number of UsersInterpreting Number of Users Resource Name Value Interpretation Range Job QueuesInterpreting Job Queues Resource Name Filesystem Available SpaceFilesystem Available Space Creating System Resource Monitoring Requests 6Troubleshooting EMS Directories and Files Etc/opt/resmon/log EMS Logging Logging and tracingEMS Tracing Performance Considerations System Performance IssuesNetwork Performance Issues Testing Disk Monitor Requests Testing Monitor RequestsTesting Cluster Monitor Requests Testing Network Monitor RequestsMaking Sure Monitors are Running Glossary Notiﬁcation See alert Glossary Glossary Index Index Index