1SLAPD.BACKENDS(5)             File Formats Manual            SLAPD.BACKENDS(5)
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NAME

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

9       The slapd(8) daemon can use a variety of different backends for serving
10       LDAP requests.  Backends may be compiled statically into slapd, or when
11       module support is enabled, they may be dynamically loaded. Multiple in‐
12       stances of a backend can be configured,  to  serve  separate  databases
13       from the same slapd server.
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15
16       Configuration options for each backend are documented separately in the
17       corresponding slapd-<backend>(5) manual pages.
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19       asyncmeta
20              This backend performs basic LDAP proxying with respect to a  set
21              of remote LDAP servers. It is an enhancement of the ldap backend
22              that operates asynchronously, to prevent tying up slapd  threads
23              while waiting for operations to complete.
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25       config This  backend  is  used  to manage the configuration of slapd at
26              run-time.  Unlike other backends, only a single instance of  the
27              config backend may be defined. It also instantiates itself auto‐
28              matically, so it is always present even if  not  explicitly  de‐
29              fined in the slapd.conf(5) file.
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31       dnssrv This backend is experimental.  It serves up referrals based upon
32              SRV resource records held in the Domain Name System.
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34       ldap   This backend acts as a proxy to forward incoming requests to an‐
35              other LDAP server.
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37       ldif   This database uses the filesystem to build the tree structure of
38              the database, using plain ascii files to store data.  Its  usage
39              should be limited to very simple databases, where performance is
40              not a requirement. This backend also supports subtree renames.
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42       mdb    This is the recommended  primary  backend.   This  backend  uses
43              OpenLDAP's own MDB transactional database library.  This backend
44              also supports subtree renames.
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46       meta   This backend performs basic LDAP proxying with respect to a  set
47              of  remote  LDAP servers. It is an enhancement of the ldap back‐
48              end.
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50       monitor
51              This backend provides information about the  running  status  of
52              the  slapd daemon. Only a single instance of the monitor backend
53              may be defined.
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55       null   Operations in this backend succeed but do nothing.
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57       passwd This backend is provided for demonstration  purposes  only.   It
58              serves  up  user  account  information from the system passwd(5)
59              file.
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61       perl   This backend embeds a perl(1) interpreter into slapd.   It  runs
62              Perl  subroutines to implement LDAP operations.  This backend is
63              deprecated.
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65       relay  This backend is experimental.  It redirects LDAP  operations  to
66              another database in the same server, based on the naming context
67              of  the  request.   Its  use  requires  the  rwm  overlay   (see
68              slapo-rwm(5)  for  details) to rewrite the naming context of the
69              request.  It is primarily intended to implement virtual views on
70              databases that actually store data.
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72       sql    This  backend  is experimental and deprecated.  It services LDAP
73              requests from an SQL database.
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75       wiredtiger
76              This backend is experimental.  It services LDAP requests from  a
77              wiredtiger database.
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FILES

80       /etc/openldap/slapd.conf
81              default slapd configuration file
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83       /etc/openldap/slapd.d
84              default slapd configuration directory
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SEE ALSO

87       ldap(3),    slapd-asyncmeta(5),    slapd-config(5),    slapd-dnssrv(5),
88       slapd-ldap(5), slapd-ldif(5), slapd-mdb(5), slapd-meta(5),  slapd-moni‐
89       tor(5),  slapd-null(5), slapd-passwd(5), slapd-perl(5), slapd-relay(5),
90       slapd-sql(5), slapd-wt(5), slapd.conf(5), slapd.overlays(5),  slapd(8).
91       "OpenLDAP Administrator's Guide" (http://www.OpenLDAP.org/doc/admin/)
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ACKNOWLEDGEMENTS

94       OpenLDAP  Software  is developed and maintained by The OpenLDAP Project
95       <http://www.openldap.org/>.  OpenLDAP Software is derived from the Uni‐
96       versity of Michigan LDAP 3.3 Release.
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100OpenLDAP 2.6.3                    2022/07/14                 SLAPD.BACKENDS(5)
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