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how to add a new database with slapd.d?

With Ubuntu 10.04, slapd is shipped by default using slapd.d configuration instead of slapd.conf. Referring to the document [1] I believe adding a new database should be as simple as adding a new file in slapd.d/cn=config/

But it doesn't work for me. Behavior explained below:

I created this new database definition by copying example [2]:
# cat "/etc/ldap/slapd.d/cn=config/olcDatabase={1}hdb" 
# BDB definition for example.com
dn: olcDatabase={1}hdb,cn=config
objectClass: olcDatabaseConfig
objectClass: olcHdbConfig
olcDatabase: {1}hdb
olcSuffix: "dc=test,dc=com"
olcDbDirectory: /var/lib/ldap
olcRootDN: "cn=Manager,dc=test,dc=com"
olcRootPW: secret
olcDbIndex: uid pres,eq
olcDbIndex: cn,sn,uid pres,eq,approx,sub
olcDbIndex: objectClass eq
olcAccess: to attrs=userPassword
  by self write
  by anonymous auth
  by dn.base="cn=Admin,dc=test,dc=com" write
  by * none
olcAccess: to *
  by self write
  by dn.base="cn=Admin,dc=test,dc=com" write
  by * read
According to my experience of using slapd.conf in the last five years, if I restart slapd, I should see DB_CONFIG and a few other files created in DB directory. But this is not happening this time.
root@orphalese:~# ls -dlh /var/lib/ldap
drwxr-x--- 2 openldap openldap 4.0K Jun 12 10:36 /var/lib/ldap
root@orphalese:~# ls -lh /var/lib/ldap
total 0

Quesiton: 1) did I do anything wrong? 2) What would you future suggest me to check?

List of what I have checked:
  1. Adding entry to the newly created database also doesn't work:

    # slapadd -b dc=test,dc=com < /tmp/first.ldif
    slapadd: slap_init no backend for "dc=test,dc=com"

  2. I checked syslog with LogLevel set to 255, end up with a lot of details in syslog but none mentioning keyword 'hdb'.

  3. The above experiment is re-done with hdb replaced with bdb without luck neither.

  4. Authentication also fails:
    $ ldapsearch -x -D cn=Manager,dc=test,dc=com -w secret
    ldap_bind: Invalid credentials (49)

  5. I also checked to make sure slapd.conf doesn't exist.

  6. I also checked there is only one slapd.d directory and slapd is using the same slapd.d that I am editing, by the fact I changed LogLevel in cn=config.ldif and it has vivid effect on syslog.



[1] http://www.openldap.org/doc/admin24/slapdconf2.html
[2] The 'example' is "/etc/ldap/slapd.d/cn=config/olcDatabase=bdb" shipped with Ubuntu:

# cat "/etc/ldap/slapd.d/cn=config/olcDatabase=bdb"
# BDB definition for example.com
dn: olcDatabase=bdb,cn=config
objectClass: olcDatabaseConfig
objectClass: olcBdbConfig
olcDatabase: bdb
olcSuffix: "dc=example,dc=com"
olcDbDirectory: /usr/local/var/openldap-data
olcRootDN: "cn=Manager,dc=example,dc=com"
olcRootPW: secret
olcDbIndex: uid pres,eq
olcDbIndex: cn,sn,uid pres,eq,approx,sub
olcDbIndex: objectClass eq
olcAccess: to attrs=userPassword
  by self write
  by anonymous auth
  by dn.base="cn=Admin,dc=example,dc=com" write
  by * none
olcAccess: to *
  by self write
  by dn.base="cn=Admin,dc=example,dc=com" write
  by * read