HP-UX Directory Server 8.1 administrator guide

For information on setting up a single-master replication environment, see “Configuring
single-master replication”.
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 8-2 “Multi-master replication (two masters)” shows an example of multi-master replication
scenario with two supplier servers and two consumer servers.
Figure 8-2 Multi-master replication (two masters)
Figure 8-3 “Multi-master replication (four masters)” shows a sample of multi-master replication
scenario with four supplier servers and eight consumer servers. In this sample setup, each supplier
server is configured with ten replication agreements to feed data to two other supplier servers
and all eight consumer servers.
8.2 Replication scenarios 323