https://bugs.openldap.org/show_bug.cgi?id=9694
--- Comment #4 from Howard Chu hyc@openldap.org --- (In reply to dpa-openldap@aegee.org from comment #3)
slapd-config(5):olcSyncrepl says: The syncdata parameter must be set to either "accesslog" if the log conforms to the slapo-accesslog(5) log format, or "changelog" if the log conforms to the obsolete changelog format.
So “changelog” is obsolete format. The Guide uses the term changelog, without stating, that it is obsolete.
The guide uses "changelog" as a generic term - a persistent log of changes.
The syncrepl statement refers specifically to the old SunDS changelog format, which is obsolete.