Example: Enabling high availability when the EP in one data center can connect to the database server in the other data center

In this example, a single IBM® Sterling Control Center Monitor cluster is formed by installing IBM Sterling Control Center Monitor in both data centers.

The sample environment meets the following criteria:
  • The active database server can be accessed using a virtual IP address, regardless of where the active database server is located.
  • The IBM Sterling Control Center Monitor EP in DC2 can connect to the database server in DC1 using a virtual IP address, such as Oracle SCAN.
  • The database is replicated from DC1 to DC2 when DC1 is the active data center; the database is replicated from DC2 to DC1 when DC2 is the active data center.
Important: When IBM Sterling Control Center Monitor high availability cluster is configured with multiple active event processors across data centers, the network latency between data centers must be less than 1 millisecond (1 ms).
  1. Before disaster recovery takes place, complete the following steps:
    1. Install and configure IBM Sterling Control Center Monitor in DC1, and connect IBM Sterling Control Center Monitor to the active database in DC1 using a virtual IP.
    2. Start IBM Sterling Control Center Monitor in DC1.
    3. Install and configure IBM Sterling Control Center Monitor in DC2 by following these steps:
      1. Configure IBM Sterling Control Center Monitor to use the active database in DC2 using a virtual IP, and connect IBM Sterling Control Center Monitor to the active database in DC1.
      2. Provide a unique name for the IBM Sterling Control Center Monitor instance.
      3. Start IBM Sterling Control Center Monitor in DC2 and make sure that IBM Sterling Control Center Monitor is running.
      4. From the Web console, verify that there are EPs in this IBM Sterling Control Center Monitor cluster.
      After the IBM Sterling Control Center Monitor cluster is started, IBM Sterling Control Center Monitor in DC2 can be running or down before disaster recovery is completed.
  2. When disaster recovery occurs, which means DC1 is down and DC2 becomes the active data center, complete the following steps:
    1. If IBM Sterling Control Center Monitor in DC2 is not running, start the IBM Sterling Control Center Monitor instance.
    2. Verify that all the servers are monitored by IBM Sterling Control Center Monitor in DC2 with the Web console.
    3. If the servers are not monitored by IBM Sterling Control Center Monitor in DC2, manually assign all servers to the IBM Sterling Control Center Monitor EP in DC2.
  3. When DC2 is down and DC1 is back active, complete the following steps:
    1. If IBM Sterling Control Center Monitor in DC1 is not automatically started, start the IBM Sterling Control Center Monitor instance.
    2. Verify that all servers are monitored by IBM Sterling Control Center Monitor in DC1.
    3. If the servers are not monitored by IBM Sterling Control Center Monitor in DC1, manually assign all servers to the IBM Sterling Control Center Monitor EP in DC1.