Hello, I can not change my config.ldif file from the HDB backend to the MDB backend. I have changed the following: ... dn: cn=module{0},cn=config objectClass: olcModuleList cn: module{0} olcModulePath: /usr/lib/ldap -olcModuleLoad: {0}back_hdb +olcModuleLoad: {0}back_mdb olcModuleLoad: {1}dynlist.so olcModuleLoad: {2}ppolicy.la structuralObjectClass: olcModuleList entryUUID: 9495e2a6-da11-1033-97d9-c1ceaf236428 creatorsName: cn=admin,cn=config createTimestamp: 20140926214112Z entryCSN: 20170201184048.317884Z#000000#000#000000 modifiersName: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth modifyTimestamp: 20170201184048Z

-dn: olcBackend={0}hdb,cn=config +dn: olcBackend={0}mdb,cn=config objectClass: olcBackendConfig -olcBackend: {0}hdb +olcBackend: {0}mdb structuralObjectClass: olcBackendConfig entryUUID: 94960592-da11-1033-97da-c1ceaf236428 creatorsName: cn=admin,cn=config createTimestamp: 20140926214112Z entryCSN: 20140926214112.940239Z#000000#000#000000 modifiersName: cn=admin,cn=config modifyTimestamp: 20140926214112Z

-dn: olcDatabase={1}hdb,cn=config +dn: olcDatabase={1}mdb,cn=config objectClass: olcDatabaseConfig -objectClass: olcHdbConfig +objectClass: olcMdbConfig -olcDatabase: {1}hdb +olcDatabase: {1}mdb +olcDbMaxSize: 1073741824 olcDbDirectory: /var/lib/ldap olcSuffix: dc=harnet,dc=de olcLastMod: TRUE olcRootDN: cn=admin,dc=harnet,dc=de olcRootPW:: -olcDbCheckpoint: 512 30 -olcDbConfig: {0}set_cachesize 0 2097152 0 -olcDbConfig: {1}set_lk_max_objects 1500 -olcDbConfig: {2}set_lk_max_locks 1500 -olcDbConfig: {3}set_lk_max_lockers 1500 -structuralObjectClass: olcHdbConfig entryUUID: 94960be6-da11-1033-97db-c1ceaf236428 creatorsName: cn=admin,cn=config createTimestamp: 20140926214112Z olcAccess: {0}to dn.subtree="dc=harnet,dc=de" by dn="uid=lamdaemon,ou=users, dc=harnet,dc=de" write by * none break olcAccess: {1}to dn.base="" by * read olcAccess: {2}to attrs=userPassword by anonymous auth by * none olcAccess: {3}to dn.base="dc=harnet,dc=de" by * read olcAccess: {4}to dn.subtree="ou=users,dc=harnet,dc=de" by dn="cn=Harbich CA Server,ou=services,dc=harnet,dc=de" write by users read by * none olcAccess: {5}to dn.subtree="ou=services,dc=harnet,dc=de" by dn="cn=Harbich CA Server,ou=services,dc=harnet,dc=de" write by users read by * none olcAccess: {6}to * by dn="cn=admin,dc=harnet,dc=de" write by * read olcDbIndex: cn pres,eq,sub olcDbIndex: sn pres,eq,sub olcDbIndex: uid pres,eq olcDbIndex: mail pres,eq,sub olcDbIndex: dcMailAlias pres,eq olcDbIndex: givenName pres,eq,sub olcDbIndex: dcSubMailAddress pres,eq olcDbIndex: dcMailAlternateAddress pres,eq olcDbIndex: dcAccountStatus pres,eq olcDbIndex: uidNumber eq olcDbIndex: gidNumber eq olcDbIndex: dhcpHWAddress eq olcDbIndex: uniqueMember eq olcDbIndex: memberUid eq olcDbIndex: objectClass eq olcDbIndex: loginShell eq olcDbIndex: sambaSID eq olcDbIndex: sambaPrimaryGroupSID eq olcDbIndex: sambaGroupType eq olcDbIndex: sambaSIDList eq olcDbIndex: sambaDomainName eq olcDbIndex: default sub olcDbIndex: ou pres,eq,sub entryCSN: 20190304162152.376029Z#000000#000#000000 modifiersName: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth modifyTimestamp: 20190304162152Z

-dn: olcOverlay={0}dynlist,olcDatabase={1}hdb,cn=config +dn: olcOverlay={0}dynlist,olcDatabase={1}mdb,cn=config objectClass: olcOverlayConfig objectClass: olcDynamicList olcOverlay: {0}dynlist olcDlAttrSet: {0}dcPosixSubAccount dcPosixOwnerURL structuralObjectClass: olcDynamicList entryUUID: 6f6012cc-da16-1033-84a3-8399e4f67731 creatorsName: cn=admin,cn=config createTimestamp: 20140926221557Z entryCSN: 20140926221557.994629Z#000000#000#000000 modifiersName: cn=admin,cn=config modifyTimestamp: 20140926221557Z ...

When I play back the config and data ldif file after deleting the ldap directories, I get the following error message:

"root@dsme01:/tmp# slapadd -F /etc/ldap/slapd.d -n 1 -l harnet.de.ldif Database number selected via -n is out of range Must be in the range 0 to 0 (the number of configured databases)"

Did I change something wrong in my config file above?

Thank you in advance for your support