Here is the server side session...

shell/iX> cd etc/openldap

shell/iX> ls

ldapfilter.conf.default       slapd.at.conf.default
ldapsearchprefs.conf.default  slapd.conf.default
ldaptemplates.conf.default    slapd.oc.conf.default

shell/iX> for f in slapd* ; do ; cp $f ${f%.default} ; done

(adjusting my slapd.conf now)

shell/iX> cat slapd.conf

include         /usr/local/ldap/etc/openldap/slapd.at.conf
include         /usr/local/ldap/etc/openldap/slapd.oc.conf
schemacheck     off
#referral       ldap://ldap.itd.umich.edu

#######################################################################
# ldbm database definitions
#######################################################################

database        ldbm
suffix          "o=hp, c=DE"
directory       /usr/local/ldap/var
rootdn          "cn=root, o=hp, c=DE"
rootpw          secret

shell/iX> cd

shell/iX> libexec/slapd -?   

libexec/slapd: Unknown option -?
usage: libexec/slapd [-d ?|debuglevel] [-f configfile] [-p portnumber]
                     [-s sysloglevel]

shell/iX> libexec/slapd -d ?

Debug levels:
        LDAP_DEBUG_TRACE        1
        LDAP_DEBUG_PACKETS      2
        LDAP_DEBUG_ARGS         4
        LDAP_DEBUG_CONNS        8
        LDAP_DEBUG_BER          16
        LDAP_DEBUG_FILTER       32
        LDAP_DEBUG_CONFIG       64
        LDAP_DEBUG_ACL          128
        LDAP_DEBUG_STATS        256
        LDAP_DEBUG_STATS2       512
        LDAP_DEBUG_SHELL        1024
        LDAP_DEBUG_PARSE        2048
        LDAP_DEBUG_ANY          65535

(might use sbin/ldif2ldbm for database loading here)
(but I will use "remote" ldapadd instead, other log)

shell/iX> libexec/slapd -p 1234 -d 8
slapd starting
 ...
 see other session log for ldapadd, ldapsearch, etc
 ...
slapd shutting down - waiting for 0 threads to terminate
slapd stopping

shell/iX> ls -l var
total 128
-rw-r-----   1 LDAP.IX           IX             2 Feb 13 11:24 NEXTID
-rw-------   1 LDAP.IX           IX         12745 Feb 13 11:24 dn.gdbm
-rw-------   1 LDAP.IX           IX         12324 Feb 13 11:24 dn2id.gdbm
-rw-------   1 LDAP.IX           IX         12318 Feb 13 11:24 id2children.gdbm
-rw-------   1 LDAP.IX           IX         12399 Feb 13 11:24 id2entry.gdbm
-rw-------   1 LDAP.IX           IX         12366 Feb 13 11:24 objectclass.gdbm
-rw-r-----   1 LDAP.IX           IX            28 Feb 13 11:22 slapd.args
-rw-r-----   1 LDAP.IX           IX             7 Feb 13 11:22 slapd.pid

shell/iX> sbin/ldbmcat var/id2entry.gdbm
1
dn: o=hp,c=DE
objectclass: organization

2
dn: cn=lars,o=hp,c=de
objectclass: person
email: me@home

shell/iX>