Managing HP Serviceguard A.12.00.00 for Linux, June 2014

4.8.1.4 cmpreparecl......................................................................................................85
4.8.2 Heartbeat Subnet and Cluster Re-formation Time ..........................................................86
4.8.3 About Hostname Address Families: IPv4-Only, IPv6-Only, and Mixed Mode.....................86
4.8.3.1 What Is IPv4–only Mode?...................................................................................87
4.8.3.2 What Is IPv6-Only Mode?..................................................................................87
4.8.3.2.1 Rules and Restrictions for IPv6-Only Mode.....................................................87
4.8.3.2.2 Recommendations for IPv6-Only Mode.........................................................89
4.8.3.3 What Is Mixed Mode?.......................................................................................89
4.8.3.3.1 Rules and Restrictions for Mixed Mode..........................................................89
4.8.4 Cluster Configuration Parameters.................................................................................89
4.8.5 Cluster Configuration: Next Step...............................................................................103
4.9 Package Configuration Planning.......................................................................................103
4.9.1 Logical Volume and File System Planning ...................................................................103
4.9.2 Planning for NFS-mounted File Systems.......................................................................104
4.9.3 Planning for Expansion............................................................................................106
4.9.4 Choosing Switching and Failover Behavior.................................................................106
4.9.5 Parameters for Configuring Generic Resources.............................................................107
4.9.6 Configuring a Generic Resource................................................................................107
4.9.6.1 Getting and Setting the Status/Value of a Simple/Extended Generic Resource.........109
4.9.6.1.1 Using Serviceguard Command to Get the Status/Value of a Simple/Extended
Generic Resource...................................................................................................109
4.9.6.1.2 Using Serviceguard Command to Set the Status/Value of a Simple/Extended
Generic Resource...................................................................................................110
4.9.6.2 Online Reconfiguration of Generic Resources......................................................110
4.9.6.3 Online Reconfiguration of serviceguard-xdc Modular Package Parameters...............110
4.9.7 About Package Dependencies...................................................................................111
4.9.7.1 Simple Dependencies........................................................................................111
4.9.7.2 Rules for Simple Dependencies..........................................................................111
4.9.7.2.1 Dragging Rules for Simple Dependencies.....................................................113
4.9.7.3 Guidelines for Simple Dependencies...................................................................115
4.9.7.4 Extended Dependencies....................................................................................115
4.9.7.4.1 Rules for Exclusionary Dependencies...........................................................116
4.9.7.4.2 Rules for different_node and any_node Dependencies...................................117
4.9.8 What Happens When a Package Fails.......................................................................117
4.9.9 For More Information...............................................................................................118
4.9.10 About Package Weights..........................................................................................118
4.9.10.1 Package Weights and Node Capacities.............................................................119
4.9.10.2 Configuring Weights and Capacities.................................................................119
4.9.10.3 Simple Method..............................................................................................119
4.9.10.3.1 Example 1..............................................................................................119
4.9.10.3.2 Points to Keep in Mind.............................................................................120
4.9.10.4 Comprehensive Method..................................................................................120
4.9.10.4.1 Defining Capacities.................................................................................121
4.9.10.4.2 Defining Weights....................................................................................122
4.9.10.5 Rules and Guidelines......................................................................................124
4.9.10.6 For More Information......................................................................................124
4.9.10.7 How Package Weights Interact with Package Priorities and Dependencies..............125
4.9.10.7.1 Example 1..............................................................................................125
4.9.10.7.2 Example 2.............................................................................................125
4.9.10.8 Serviceguard Load Sensitive Placement..............................................................125
4.9.10.8.1 Load Balancing.......................................................................................126
4.9.10.8.2 Parameters ............................................................................................126
4.9.10.8.3 Keyword ...............................................................................................126
4.9.10.8.4 Limitations..............................................................................................126
4.9.10.8.5 Recommendation....................................................................................126
6 Contents