A replication server performs the following tasks:
Manages connections from directory servers
Connects to other replication servers
Listens for connections from other replication servers
Receives changes from directory servers
Forwards changes to directory servers and other replication servers
Saves changes to stable storage, which includes trimming older operations
Replication servers are not the same as directory servers. However, like directory servers, replication servers use a configuration file, can be configured and monitored online, and can be backed up and restored. Replication servers are therefore always LDAP servers or JMX servers, even though replication servers do not store directory data.