Making Application Highly Available with Oracle Clusterware

Making Application Highly Available with Oracle Clusterware

Oracle Clusterware is a portable cluster infrastructure that provides HA services to RAC databases and other applications. Oracle Clusterware makes applications highly available by monitoring the health of the applications, by restarting applications on failure, and by relocating applications to another cluster node when the currently used node fails or when the application can no longer run in the current node. In the case of node failure, certain types of protected applications, such as a RAC database instance, may not be failed over to the surviving nodes.

A cluster is a collection of two or more nodes where the nodes share a common pool of storage used by the Oracle Clusterware system files (the Oracle Cluster Registry [OCR] and the voting disk), a common network interconnect, and a common operating system.

Oracle Clusterware monitors all protected applications periodically, and based on the defined failover policy, it can restart them either on the same node or relocate them to another node, or it can decide to not restart them at all.

Objectives

• Describe the high availability components of Oracle Clusterware
• Contrast policy-managed and administration-managed databases
• Describe the functionality of server pools
• Describe application-placement policies
• Create an application Virtual IP (VIP)
• Manage application resources

Topics

1. Managing Oracle Notification Server with srvctl HA App with clusterware
2. Managing Resources with crsctl
   
3. Adding Resources by Using crsctl HA App with clusterware
   
4. Defining Resource Dependencies HA App with clusterware
5. To add a new resource type to Oracle Clusterware by using Oracle Enterprise Manager HA App with clusterware
   
6. Clusterware Resource Modeling HA App with clusterware
   
7. Server Pools HA App with clusterware
   
8. Creating Server Pools with srvctl and crsctl HA App with clusterware
9. Resource Management Options
   
10. Oracle Clusterware HA Components
    
11. Oracle Clusterware High Availability (HA)
12. Creating an Application VIP Managed by Oracle Clusterware

Refer the links below:

Making Application HA with oracle clusterware
High Availability Architectures and Solutions