How to View all Cluster Topologies

Managing Multi-Server Domains 18-5 To view Oracle CEP high availability cluster topologies: 1. In the left pane, click the Domain node, where Domain refers to the name of your Oracle CEP domain.

2. In the right pane, click the Cluster tab.

3. In the right pane, click the Topology tab.

For an Oracle CEP high availability application, you can use the Topology tab to: a. Visualize a high-availability configuration. See Section 18.1.3.1, Visualizing an Oracle High Availability Configuration b. Visualizer a high-availability and scalability configuration. See Section 18.1.3.2, Visualizing an Oracle High Availability and Scalability Configuration . For information on the various tools along the top of the topology canvas, see Section 18.3, Managing the Cluster Topology Diagram . 4. To view the properties for a given group, click on the group in the Group List. 5. To view the properties for a given server instance, click on the server instance in the Group List.

6. To view details on a given server instance, click the Group Member tab and select

the group and server instance as Figure 18–5 shows. Figure 18–5 Group Member Tab 7. Use the Group Member tab to customize the group table: ■ To change the order of columns, click on the column name in the cache chart and drag left or right. 18-6 Oracle Complex Event Processing Visualizer Users Guide ■ To change the sort order of a column, click the triangle to the right of the column name in the cache chart.

18.1.3.1 Visualizing an Oracle High Availability Configuration

For an Oracle CEP high availability application, the Topology tab shows the notification group nested within the deployment group. In Figure 18–6 , the deployment group is MyDeploymentGroup and the notification group is ActiveActiveGroupBean_group1. Figure 18–6 Cluster Topology Tab: Oracle CEP High Availability The primary server is identified by the icon that Figure 18–7 shows. In Figure 18–6 , the primary server is CEPServer2. Figure 18–7 Primary Server The stream data source inputs to both primary and secondary servers but only the primary server outputs events. If CEPServer2 goes down, an Oracle high availability failover occurs and CEPServer1 resumes outputting events as the new primary for ActiveActiveGroupBean_group1 . When CEPServer2 is brought back online, it rejoins ActiveActiveGroupBean_group1 as a secondary server. Managing Multi-Server Domains 18-7 For information on the various tools along the top of the topology canvas, see Section 18.3, Managing the Cluster Topology Diagram . For more information, see: ■ Understanding High Availability in the Oracle Complex Event Processing Developers Guide for Eclipse ■ Deployment Group and Notification Group in the Oracle Complex Event Processing Developers Guide for Eclipse

18.1.3.2 Visualizing an Oracle High Availability and Scalability Configuration

If your Oracle CEP high availability application combines high availability and scalability, then the Topology tab shows notification groups nested within the deployment group. In Figure 18–8 , the deployment group is MyDeploymentGroup and the notification groups are ActiveActiveGroupBean_group1 and ActiveActiveGroupBean_ group2 . Figure 18–8 Cluster Topology Tab: Oracle CEP High Availability and Scalability The primary server is identified by the icon that Figure 18–9 shows. In Figure 18–8 , the primary server of notification group ActiveActiveGroupBean_group1 is CEPServer1 and the primary server of notification group ActiveActiveGroupBean_group2 is CEPServer3.