slapd(8) includes support for LDAP Sync-based replication, called syncrepl, which may be used to maintain shadow copies of directory information on multiple directory servers. In its most basic configuration, the master is a syncrepl provider and one or more slave (or shadow) are syncrepl consumers. An example master-slave configuration is shown in figure 3.3.
Figure 3.3: Replicated Directory Services
This configuration can be used in conjunction with either of the first two configurations in situations where a single slapd(8) instance does not provide the required reliability or availability.
