A global topology (with data centers in different countries) might require restricting replication for security or compliance reasons. For example, legal restrictions might state that specific employee information cannot be copied outside of the U.S.A. Or, a site in Australia might require Australian employee details only.
The fractional replication feature enables only a subset of the attributes that are present in an entry to be replicated. Attribute lists are used to determine which attributes can and cannot be replicated. Fractional replication can only be applied to read-only consumers.
For detailed information about how fractional replication works, see Fractional Replication in Sun Java System Directory Server Enterprise Edition 6.1 Reference. For information about how to configure fractional replication, see Fractional Replication in Sun Java System Directory Server Enterprise Edition 6.1 Administration Guide.