Managing Serviceguard Nineteenth Edition, Reprinted June 2011

Contents
Publishing History .......................................................................................17
Preface......................................................................................................18
1 Serviceguard at a Glance.........................................................................20
What is Serviceguard? ...........................................................................................................20
Failover............................................................................................................................21
About Veritas CFS and CVM from Symantec..........................................................................22
Using Serviceguard Manager..................................................................................................23
Monitoring Clusters with Serviceguard Manager....................................................................23
Administering Clusters with Serviceguard Manager................................................................23
Configuring Clusters with Serviceguard Manager...................................................................23
Starting Serviceguard Manager...........................................................................................23
Using SAM............................................................................................................................23
What are the Distributed Systems Administration Utilities?............................................................24
A Roadmap for Configuring Clusters and Packages ....................................................................24
2 Understanding Serviceguard Hardware Configurations..................................26
Redundancy of Cluster Components..........................................................................................26
Redundant Network Components .............................................................................................27
Rules and Restrictions.........................................................................................................27
Redundant Ethernet Configuration .......................................................................................28
Cross-Subnet Configurations................................................................................................29
Configuration Tasks.......................................................................................................29
Restrictions...................................................................................................................29
For More Information.....................................................................................................30
Replacing Failed Network Cards..........................................................................................31
Redundant Disk Storage..........................................................................................................31
Supported Disk Interfaces ...................................................................................................31
Data Protection .................................................................................................................32
Disk Mirroring .............................................................................................................32
Disk Arrays using RAID Levels and Multiple Data Paths ......................................................32
About Multipathing...................................................................................................32
Monitoring LVM Disks Through Event Monitoring Service.........................................................33
Monitoring VxVM and CVM Disks.......................................................................................33
Replacing Failed Disk Mechanisms ......................................................................................33
Replacing Failed I/O Cards................................................................................................33
Sample SCSI Disk Configurations ........................................................................................33
Sample Fibre Channel Disk Configuration ............................................................................34
Redundant Power Supplies ......................................................................................................35
Larger Clusters ......................................................................................................................35
Active/Standby Model ......................................................................................................36
Point to Point Connections to Storage Devices .......................................................................36
3 Understanding Serviceguard Software Components......................................38
Serviceguard Architecture........................................................................................................38
Serviceguard Daemons.......................................................................................................38
Configuration Daemon: cmclconfd...................................................................................39
Cluster Daemon: cmcld..................................................................................................39
File Management Daemon: cmfileassistd..........................................................................40
Syslog Log Daemon: cmlogd..........................................................................................40
Cluster Logical Volume Manager Daemon: cmlvmd...........................................................40
Cluster Object Manager Daemon: cmomd.......................................................................40
Contents 3