Sample disaster recovery configuration

Figure: Sample disaster recovery configuration shows a production site and a DR site.

The two virtual business services are shown to be symmetrical but they are not required to be symmetrical. The same Management Server is preferred to manage the production site and DR site but you can use two different Management Servers too.

Figure: Sample disaster recovery configuration

Sample disaster recovery configuration

To enable disaster recovery for the Oracle database, global cluster option (GCO) is configured at the database tier. Traditional VCS global service group failover ensures that the database is online only at one site at a time. If there is a failure of the database tier on the production cluster, a disaster recovery alert is triggered by VCS GCO.

If you start the virtual business service at the DR site in response to the alert, the entire Finance application is brought up in the specified order. At the production site, the inter-cluster fault propagation mechanism propagates the fault at the database tier to the middle tier and so on. Depending on the configured behavior, the applications in other tiers might go down or stay online.

The end-to-end Finance application is now fully available at the DR site, while it is in PARTIAL state or FAULTED state at the production site.