HP-UX Directory Server Administrator Guide HP-UX Directory Server Version 8.1 (5900-3098, May 2013)

Figure 15 Single-master replication
In this particular configuration, the ou=people,dc=example,dc=com suffix receives a large
number of search requests. Therefore, to distribute the load, this tree, which is mastered on Server
A, is replicated to two read-only replicas located on Server B and Server C.
For information on setting up a single-master replication environment, see “Configuring single-master
replication” (page 326).
8.2.2 Multi-master replication
Directory Server also supports complex replication scenarios in which the same suffix (database)
can be mastered on many servers. This suffix is held in a read-write replica on each server. This
means that each server maintains a changelog for the read-write replica.
This type of configuration can work with any number of consumer servers. Each consumer server
holds a read-only replica. The consumers can receive updates from all the suppliers. The consumers
also have referrals defined for all the suppliers to forward any update requests that the consumers
receive. Such scenarios are called multi-master configurations.
Figure 16 (page 322) shows an example of multi-master replication scenario with two supplier
servers and two consumer servers.
8.2 Replication scenarios 321