NAME

       slapd.backends - backends for slapd, the stand-alone LDAP daemon

DESCRIPTION

       The  slapd(8)  daemon can use a variety of different backends for serving LDAP requests.  Backends may be
       compiled statically into slapd, or when module support  is  enabled,  they  may  be  dynamically  loaded.
       Multiple  instances  of  a  backend  can  be  configured, to serve separate databases from the same slapd
       server.

       Configuration options for each backend are documented separately in the corresponding  slapd-<backend>(5)
       manual pages.

       asyncmeta
              This  backend  performs basic LDAP proxying with respect to a set of remote LDAP servers. It is an
              enhancement of the ldap backend that operates asynchronously, to prevent tying  up  slapd  threads
              while waiting for operations to complete.

       config This  backend  is  used  to manage the configuration of slapd at run-time.  Unlike other backends,
              only a single instance of  the  config  backend  may  be  defined.  It  also  instantiates  itself
              automatically, so it is always present even if not explicitly defined in the slapd.conf(5) file.

       dnssrv This  backend is experimental.  It serves up referrals based upon SRV resource records held in the
              Domain Name System.

       ldap   This backend acts as a proxy to forward incoming requests to another LDAP server.

       ldif   This database uses the filesystem to build the tree structure of the database, using  plain  ascii
              files  to  store data.  Its usage should be limited to very simple databases, where performance is
              not a requirement. This backend also supports subtree renames.

       mdb    This is the recommended primary backend.  This  backend  uses  OpenLDAP's  own  MDB  transactional
              database library.  This backend also supports subtree renames.

       meta   This  backend  performs basic LDAP proxying with respect to a set of remote LDAP servers. It is an
              enhancement of the ldap backend.

       monitor
              This backend provides information about the running status of the  slapd  daemon.  Only  a  single
              instance of the monitor backend may be defined.

       ndb    This  backend  is  experimental,  incomplete,  and deprecated.  It uses the transactional database
              interface of the MySQL Cluster Engine (NDB) to store data. Note that Oracle, which now owns MySQL,
              has withdrawn support for NDB and this backend is unlikely to be developed any further.

       null   Operations in this backend succeed but do nothing.

       passwd This  backend  is provided for demonstration purposes only.  It serves up user account information
              from the system passwd(5) file.

       perl   This backend embeds a perl(1) interpreter into slapd.  It runs Perl subroutines to implement  LDAP
              operations.  This backend is deprecated.

       relay  This  backend  is  experimental.   It  redirects  LDAP  operations to another database in the same
              server, based on the naming context of the  request.   Its  use  requires  the  rwm  overlay  (see
              slapo-rwm(5)  for details) to rewrite the naming context of the request.  It is primarily intended
              to implement virtual views on databases that actually store data.

       sql    This backend is experimental and deprecated.  It services LDAP requests from an SQL database.

       wiredtiger
              This backend is experimental.  It services LDAP requests from a wiredtiger database.

FILES

       /etc/ldap/slapd.conf
              default slapd configuration file

       /etc/ldap/slapd.d
              default slapd configuration directory

SEE ALSO

       ldap(3),   slapd-asyncmeta(5),   slapd-config(5),    slapd-dnssrv(5),    slapd-ldap(5),    slapd-ldif(5),
       slapd-mdb(5),    slapd-meta(5),    slapd-monitor(5),    slapd-ndb(5),   slapd-null(5),   slapd-passwd(5),
       slapd-perl(5), slapd-relay(5), slapd-sql(5),  slapd-wt(5),  slapd.conf(5),  slapd.overlays(5),  slapd(8).
       "OpenLDAP Administrator's Guide" (http://www.OpenLDAP.org/doc/admin/)

ACKNOWLEDGEMENTS

       OpenLDAP  Software  is  developed  and  maintained  by  The  OpenLDAP Project <http://www.openldap.org/>.
       OpenLDAP Software is derived from the University of Michigan LDAP 3.3 Release.