Discontinued ldbm backend to slapd
/etc/ldap/slapd.conf
LDBM was the original database backend to slapd(8), and was supported up to OpenLDAP 2.3. It has been superseded by the more robust BDB and HDB backends.
OpenLDAP Software is developed and maintained by The OpenLDAP Project <http://www.openldap.org/>. OpenLDAP Software is derived from University of Michigan LDAP 3.3 Release.