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LDAP Implementation Cookbook by Permana Widhiasta, Harri Stranden, Michel Melot, Heinz Johner

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7.7. Referrals

Referrals provide a way of splitting a namespace into separate partitions as introduced in 1.1.3, “Distributed Directories” on page 6. Scalability, availability, and manageability of an LDAP environment may be improved if the directory is logically split. It can even be distributed to different server machines and locations.

In the following example (see Figure 51), the global directory of an organization has been split to form three directories located at different locations (circled in Figure 51). This may be done to address network performance and manageability issues. Also, two master servers are configured with replica servers.

Figure 51. Referrals

Master servers A and B each have a replica server, E and D, respectively. ...

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