Managing Serviceguard Nineteenth Edition, Reprinted June 2011

Cluster Lock Planning..............................................................................................................94
Cluster Lock Disk and Re-formation Time ...............................................................................95
Planning for Expansion.......................................................................................................95
Using a Quorum Server......................................................................................................95
Quorum Server Worksheet ............................................................................................95
LVM Planning ........................................................................................................................96
Using EMS to Monitor Volume Groups..................................................................................96
LVM Worksheet ................................................................................................................97
CVM and VxVM Planning ......................................................................................................98
CVM and VxVM Worksheet ...............................................................................................98
Cluster Configuration Planning ................................................................................................99
About Cluster-wide Device Special Files (cDSFs).....................................................................99
Points To Note..............................................................................................................99
Where cDSFs Reside...................................................................................................100
Limitations of cDSFs................................................................................................100
LVM Commands and cDSFs.....................................................................................100
About Easy Deployment....................................................................................................100
Advantages of Easy Deployment...................................................................................101
Limitations of Easy Deployment......................................................................................101
Heartbeat Subnet and Cluster Re-formation Time .................................................................101
About Hostname Address Families: IPv4-Only, IPv6-Only, and Mixed Mode............................102
What Is IPv4–only Mode?............................................................................................102
What Is IPv6-Only Mode?............................................................................................102
Rules and Restrictions for IPv6-Only Mode.................................................................103
Recommendations for IPv6-Only Mode......................................................................104
What Is Mixed Mode?.................................................................................................104
Rules and Restrictions for Mixed Mode......................................................................104
Cluster Configuration Parameters .......................................................................................105
Cluster Configuration: Next Step........................................................................................120
Package Configuration Planning ............................................................................................120
Logical Volume and File System Planning ...........................................................................120
Planning Veritas Cluster Volume Manager (CVM) and Cluster File System (CFS)........................121
CVM 4.1 and later without CFS.....................................................................................121
CVM 4.1 and later with CFS ........................................................................................121
About the Volume Monitor................................................................................................123
Using the Volume Monitor............................................................................................123
Command Syntax...................................................................................................124
Examples..............................................................................................................125
Scope of Monitoring...............................................................................................125
Planning for NFS-mounted File Systems...............................................................................125
Planning for Expansion.....................................................................................................127
Choosing Switching and Failover Behavior..........................................................................127
Parameters for Configuring EMS Resources..........................................................................128
About Package Dependencies...........................................................................................128
Simple Dependencies..................................................................................................129
Rules for Simple Dependencies.................................................................................129
Guidelines for Simple Dependencies.........................................................................132
Extended Dependencies...............................................................................................132
Rules for Exclusionary Dependencies.........................................................................133
Rules for different_node and any_node Dependencies.................................................134
What Happens when a Package Fails............................................................................134
For More Information...................................................................................................135
About Package Weights....................................................................................................135
Package Weights and Node Capacities.........................................................................135
Configuring Weights and Capacities.............................................................................135
6 Contents