ldap SQL backend and syncrepl

[Frederic Bouy <frederic.bouy@gmail.com>]

Hello,

For performance issues (millions or records) I have two ldap servers:
- one master with an sql backend (postgres) to allow easy data manipulation
- one slave to anwer ldap queries and provide good response time

When lauching the slave ("./slapd -f /usr/local/openldap/etc/openldap/slapd-front.conf -h "ldap://localhost:3890" -d 1") I got a first non blocking error I don't really understand:
" => bdb_dn2id("dc=lnp")
<= bdb_dn2id: get failed: DB_NOTFOUND: No matching key/data pair found (-30988)"

According to the fact that the following command is successfull:
"ldapwhoami -H "ldap://localhost:389" -D "cn=manager,dc=lnp" -w secret"

and then the synchronization fails with this error:
"read1msg: ld 0x9ca73e8 msgid 2 message type search-entry
ber_scanf fmt ({xx) ber:
ber_scanf fmt ({a) ber:
ber_scanf fmt (o) ber:
ber_scanf fmt ({em) ber:
do_syncrep2: rid=001 got empty syncUUID with LDAP_SYNC_ADD
ldap_msgfree
connection_get(11): got connid=0
ldap_free_request (origid 2, msgid 2)
ldap_free_connection 1 1
ldap_send_unbind
ber_flush2: 7 bytes to sd 11
ldap_free_connection: actually freed
do_syncrepl: rid=001 quitting"

Do you know whether suncrepl is support for ldap with sql backend?
Do you know where can I find some documentation on this?
Do you have any clue on how I could solve my issues?

Thanks in advance.
Please find below the .conf of those two ldap servers:

# === MASTER =====
include         /usr/local/openldap/etc/openldap/schema/core.schema
include         /usr/local/openldap/etc/openldap/schema/cosine.schema
include         /usr/local/openldap/etc/openldap/schema/nis.schema
include         /usr/local/openldap/etc/openldap/schema/inetorgperson.schema
include         /usr/local/openldap/etc/openldap/schema/lnp.schema

pidfile         /usr/local/openldap/var/slapd-lnp.pid
argsfile        /usr/local/openldap/var/slapd-lnp.args

backend         sql

#######################################################################
# sql database definitions
#######################################################################

database        sql
suffix          "dc=lnp"
rootdn          "cn=Manager,dc=lnp"
rootpw          secret
dbname          lnp
dbuser          lnp
dbpasswd        lnp
strcast_func    "text"
#subtree_cond "ldap.entries.dn like '%'||?"
concat_pattern  "?||?"
has_ldapinfo_dn_ru      no

overlay syncprov
syncprov-checkpoint 100 10
syncprov-sessionlog 100
lastmod on


# === MASTER =====
include         /usr/local/openldap/etc/openldap/schema/core.schema
include         /usr/local/openldap/etc/openldap/schema/cosine.schema
include         /usr/local/openldap/etc/openldap/schema/nis.schema
include         /usr/local/openldap/etc/openldap/schema/inetorgperson.schema
include         /usr/local/openldap/etc/openldap/schema/lnp.schema

pidfile         /usr/local/openldap/var/run/slapd-front.pid
argsfile        /usr/local/openldap/var/run/slapd-front.args

#######################################################################
# BDB database definitions
#######################################################################

database        bdb
suffix          "dc=lnp"
rootdn          "cn=Manager,dc=lnp"
rootpw          secret
directory       /usr/local/openldap/var/openldap-data

# index entryCSN,entryUUID eq
index entryUUID eq

# filter="(objectClass=*)"

syncrepl rid=001
        provider=ldap://localhost:389
        bindmethod=simple
        type=refreshAndPersist
        searchbase="ou=31,dc=lnp"
        schemachecking=off
        binddn="cn=manager,dc=lnp"
        credentials=secret
        filter="(objectClass=*)"

mirrormode on
serverID 1