High Availability Deployment Examples

In Figure 26-3, the database and Oracle directory server (LDAP server) are co-resident on the same computer. Changes made on one directory server instance are reflected on the second directory server instance through multimaster replication. When a failure of the directory server or database server on a particular node occurs, it is elevated to a computer failure so that the connection redirector will stop handing off connections to the computer on which there was a failure.

Figure 26-3 Deployment Example (Two Oracle Internet Directory Nodes in Replication)

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As Figure 26-4 illustrates, each of the regions can be set up with two Oracle Internet Directory nodes replicating between each other. This configuration is typical of global directory networks deployed by large enterprises where each of the regions could potentially represent a continent or a country.

Figure 26-4 Deployment Example 2

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