Specifications
Managing Open Directory Replication
You can schedule Open Directory replication or replicate on demand, promote a
replica to a master, or take a replica out of service.
For more information, see:
“ Â Managing Principals” on page 206
“ Â Making an Open Directory Replica into a Relay” on page 192
“ Â Promoting an Open Directory Replica” on page 192
“ Â Decommissioning an Open Directory Replica” on page 195
Making an Open Directory Replica into a Relay
There is not much dierence between a relay and replica. Both have a read-only copy
of the Open Directory master’s LDAP directory domain and also a read/write copy of
the Open Directory Password Server and the Kerberos Key Distribution Center (KDC).
A relay is a direct member replica of a Open Directory master and it has replicas that it
replicates to.
You can make an Open Directory replica into a relay by ensuring the following:
The replica is a direct replica of the Open Directory master (rst-tier). Â
The replica has replicas (supports up to 32 replicas). Â
For more information about relays, see “Cascading Replication” on page 61.
Promoting an Open Directory Replica
If an Open Directory master fails and you cannot recover it from a backup, you
can promote a replica to be a master. The new master (promoted replica) uses the
directory and authentication databases of the replica.
After doing this, you must convert all other replicas of the old master to standalone
directory services and then make them replicas of the new master.
Important: Use this procedure only to replace an Open Directory master with its
replica. To keep the Open Directory master in operation and make its replica another
master, do not use this procedure. Instead, decommission the replica and then make
it a master as described in “Decommissioning an Open Directory Replica” on page 195
and “Setting Up an Open Directory Master” on page 81.
To promote an Open Directory replica:
1 Open Server Admin and connect to the replica server that you want to promote to
a master.
2 Click the triangle at the left of the server.
The list of services appears.
3 From the expanded Servers list, select Open Directory.
192 Chapter 9 Maintaining Open Directory Services