The changelog displays the server state information, which is important for failover between servers during synchronization operations. The server state information is exchanged between the servers in the network (LDAP servers and replication servers) as part of the protocol start message. It also helps the client application determine which server is most up-to-date.

  • Make sure the uid=admin account has the necessary access rights to the cn=changelog backend. 
    $ bin/ldapsearch --baseDN cn=changelog --dontWrap "(objectclass=*)" "+"
    dn: cn=changelog

dn: changeNumber=1,cn=changelog 
entry-size-bytes: 182 
targetUniqueId: 68147342-1f61-3465-8489-3de58c532130 
changeTime: 20111023002624Z 
lastReplicaCSN: 0000011D27184D9E303000000001 
replicationCSN: 0000011D27184D9E303000000001 
replicaIdentifier: 12336

dn: changeNumber=2,cn=changelog 
entry-size-bytes: 263 
targetUniqueId: 4e9b7847-edcb-3791-b11b-7505f4a55af4 
changeTime: 20111023002624Z 
lastReplicaCSN: 0000011D27184F2E303000000002 
replicationCSN: 0000011D27184F2E303000000002 
replicaIdentifier: 12336