9.3 High availability group
High availability groups are dynamic components created from a core group. Each group represents a highly available singleton service. The active members in a group are ready to host the service at any time. See Figure 9-5.
Figure 9-5 High availability group for a Transaction Manager
To view a list of high availability groups, click Servers -> Core groups -> Core group settings -> <core_group_name>. Then select the Runtime tab. Specify a match criterion for a list of specific high availability group(s) or an asterisk (*) as a wildcard to get a complete list of groups. For example, specifying type=WAS_TRANSACTIONS results in a list of Transaction Manager high availability groups. See Figure 9-6.
Figure 9-6 Find high availability groups for Transaction Managers
When you click Show groups, a list of high availability groups that match the criteria you specified is displayed Each high availability group is displayed along with its associated policy.
Figure 9-7 Listing high availability groups of Transaction Managers
Select any high availability group and a list of group members is displayed Only running JVMs are displayed in the group member list. From here you can manage the group members by activating, deactivating, enabling or disabling them.
Figure 9-8 Managing a high availability group