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|Oracle Fusion Middleware Administration Guide for Oracle Unified Directory 11g Release 1 (11.1.1)|
Replication enables copies of identical data to be available across multiple servers. The directory server uses a multi-master replication model, which means that all the directory servers within a replication topology can accept read and write operations.
The multi-master replication model is loosely consistent by default. This means that changes made on one server are replayed asynchronously to the other servers in the topology. The same entries can be modified simultaneously on different servers. When updates are sent between the two servers, any conflicting changes must be resolved. Various attributes of a WAN, such as latency, can increase the chance of replication conflicts. Conflict resolution generally occurs automatically. A number of conflict rules determine which change takes precedence. In some cases conflicts must be resolved manually.
Note - In certain deployment scenarios, the default loose consistency model might not be adequate. In these situations, you can configure replication to function in assured mode. For more information, see Configuring Assured Replication.
Replication always occurs over a secure connection. Both parties of a replication session must authenticate to the other using SSL certificates. No access control or privileges are enforced. The following sections describe how to configure replication in the directory server.
For information about the mechanics of the replication process see Chapter 5, Directory Server Replication, in Oracle Fusion Middleware Architecture Reference for Oracle Unified Directory.
This chapter covers the following topics: