Managing HP Serviceguard A.11.20.20 for Linux, March 2014

4.7.3.2 What Is IPv6-Only Mode?...................................................................................88
4.7.3.2.1 Rules and Restrictions for IPv6-Only Mode......................................................89
4.7.3.2.2 Recommendations for IPv6-Only Mode..........................................................90
4.7.3.3 What Is Mixed Mode?........................................................................................90
4.7.3.3.1 Rules and Restrictions for Mixed Mode...........................................................90
4.7.4 Cluster Configuration Parameters ................................................................................90
4.7.5 Cluster Configuration: Next Step ..............................................................................104
4.8 Package Configuration Planning ......................................................................................104
4.8.1 Logical Volume and File System Planning ...................................................................105
4.8.2 Planning for NFS-mounted File Systems......................................................................106
4.8.3 Planning for Expansion............................................................................................107
4.8.4 Choosing Switching and Failover Behavior.................................................................107
4.8.5 Parameters for Configuring Generic Resources............................................................108
4.8.6 Configuring a Generic Resource...............................................................................109
4.8.6.1 Getting and Setting the Status/Value of a Simple/Extended Generic Resource.........111
4.8.6.1.1 Using Serviceguard Command to Get the Status/Value of a Simple/Extended
Generic Resource...................................................................................................111
4.8.6.1.2 Using Serviceguard Command to Set the Status/Value of a Simple/Extended
Generic Resource...................................................................................................111
4.8.6.2 Online Reconfiguration of Generic Resources......................................................112
4.8.6.3 Online Reconfiguration of serviceguard-xdc Modular Package Parameters...............112
4.8.7 About Package Dependencies..................................................................................113
4.8.7.1 Simple Dependencies.......................................................................................113
4.8.7.2 Rules for Simple Dependencies..........................................................................113
4.8.7.2.1 Dragging Rules for Simple Dependencies.....................................................115
4.8.7.3 Guidelines for Simple Dependencies..................................................................117
4.8.7.4 Extended Dependencies...................................................................................117
4.8.7.4.1 Rules for Exclusionary Dependencies...........................................................118
4.8.7.4.2 Rules for different_node and any_node Dependencies...................................119
4.8.8 What Happens When a Package Fails......................................................................119
4.8.9 For More Information...............................................................................................120
4.8.10 About Package Weights..........................................................................................120
4.8.10.1 Package Weights and Node Capacities............................................................120
4.8.10.2 Configuring Weights and Capacities................................................................120
4.8.10.3 Simple Method..............................................................................................121
4.8.10.3.1 Example 1.............................................................................................121
4.8.10.3.2 Points to Keep in Mind............................................................................122
4.8.10.4 Comprehensive Method..................................................................................122
4.8.10.4.1 Defining Capacities.................................................................................122
4.8.10.4.2 Defining Weights...................................................................................124
4.8.10.5 Rules and Guidelines......................................................................................126
4.8.10.6 For More Information......................................................................................126
4.8.10.7 How Package Weights Interact with Package Priorities and Dependencies..............126
4.8.10.7.1 Example 1..............................................................................................127
4.8.10.7.2 Example 2.............................................................................................127
4.8.11 About External Scripts.............................................................................................127
4.8.11.1 Using Serviceguard Commands in an External Script............................................129
4.8.11.2 Determining Why a Package Has Shut Down......................................................130
4.8.11.2.1 last_halt_failed Flag..................................................................................130
4.8.12 About Cross-Subnet Failover....................................................................................130
4.8.12.1 Implications for Application Deployment.............................................................131
4.8.12.2 Configuring a Package to Fail Over across Subnets: Example...............................131
4.8.12.2.1 Configuring node_name...........................................................................131
4.8.12.2.2 Configuring monitored_subnet_access.......................................................132
4.8.12.2.3 Configuring ip_subnet_node.....................................................................132
6 Contents