The following figure shows a single master replication strategy that illustrates basic replication concepts.
In single master replication, one instance of Directory Server manages the master directory database, logging all changes. The master database is replicated to any number of consumer databases. The consumer instances of Directory Server are optimized for read and search operations. Any write operation received by a consumer is referred back to the master. The master periodically updates the consumer databases.
Advantages of single master replication include:
Single instance of Directory Server optimized for database read and write operations
Any number of consumer instances of Directory Server optimized for read and search operations
Horizontal scalability for consumer instances of Directory Server