SLAPD.BACKENDS(5)

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 Note that Oracle, which now owns MySQL, has withdrawn support for NDB and this backend is unlikely to be developed any further.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

ETCDIR/slapd.conf
    default slapd configuration file

ETCDIR/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