In an entry-balanced deployment, some data is replicated everywhere, such as the schema, the server registry, and other shared data, and some data is replicated only on certain servers. A replication domain contains all of the servers in a replicated topology and shares a schema. The replication domain is associated with the base DN and must be a base DN of a backend.
If a data set name is not defined when you set up the Directory Proxy Server, one will be provided by default. The proper configuration of an entry-balancing environment requires coordination between the Directory Server and Directory Proxy Server. Once replication is enabled, the replication domain may be designated as the domain participating in entry balancing.
Review the Directory Server Administration Guide for more details about replication, managing the replication topology, and working with multiple backends.