Netscape DIRECTORY SERVER 6.1 - DEPLOYMENT Deployment Manual page 112

Common Replication Scenarios
Although two separate servers can have master copies of the same data, within the
scope of a single replication agreement, there is only one supplier server and one
consumer. So, to create a multi-master environment between two supplier servers
that share responsibility for the same data, you need to create more than one
replication agreement. The following figure shows this configuration:
Figure 6-2
In this illustration, Supplier A and Supplier B each hold a read-write replica of the
same data.
The number of masters or suppliers you can have in any replication environment is
limited to two. However, the number of consumer servers that hold read-only
replicas is not limited. Figure 6-3 on page 113 shows the replication traffic in an
environment with two masters (read-write replicas in the illustration), and two
consumers (read-only replicas in the illustration). This figure shows that the
consumers can be updated by both masters. The master servers ensure that the
changes do not collide.
112 Netscape Directory Server Deployment Guide • August 2002
Multi-Master Replication Configuration (Two Masters)