1SLAPD-LDBM(5) File Formats Manual SLAPD-LDBM(5)
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6 slapd-ldbm - LDBM backend to slapd
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9 /etc/openldap/slapd.conf
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12 The LDBM backend to slapd(8) is an easy-to-configure but obsolete data‐
13 base backend. It does not offer the data durability features of the
14 BDB and HDB backends and hence is considered deprecated in favor of
15 these robust backends. LDBM uses lightweight non-transactional data
16 interfaces, such as those provided by GDBM or Berkeley DB, to store
17 data. It makes extensive use of indexing and caching to speed data
18 access.
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21 These slapd.conf options apply to the LDBM backend database. That is,
22 they must follow a "database ldbm" line and come before any subsequent
23 "backend" or "database" lines. Other database options are described in
24 the slapd.conf(5) manual page.
25 cachesize <integer>
27 Specify the size in entries of the in-memory cache maintained by
28 the LDBM backend database instance. The default is 1000
29 entries.
30 dbcachesize <integer>
32 Specify the size in bytes of the in-memory cache associated with
33 each open index file. If not supported by the underlying data‐
34 base method, this option is ignored without comment. The
35 default is 100000 bytes.
36 dbnolocking
38 Specify that no database locking should be performed. Enabling
39 this option may improve performance at the expense of data secu‐
40 rity. Do NOT run any slap tools while slapd is running.
41 dbnosync
43 Specify that on-disk database contents should not be immediately
44 synchronized with in memory changes. Enabling this option may
45 improve performance at the expense of data security.
46 dbsync <frequency> <maxdelays> <delayinterval>
48 Flush dirty database buffers to disk every <seconds> seconds.
49 Implies dbnosync (ie. individual updates are no longer written
50 to disk). It attempts to avoid syncs during periods of peak
51 activity by waiting <delayinterval> seconds if the server is
52 busy, repeating this delay up to <maxdelays> times before pro‐
53 ceeding. It is an attempt to provide higher write performance
54 with some amount of data security. Note that it may still be
55 possible to get an inconsistent database if the underlying
56 engine fills its cache and writes out individual pages and slapd
57 crashes or is killed before the next sync. <maxdelays> and
58 <delayinterval> are optional and default to 12 and 5 respec‐
59 tively, giving a total elapsed delay of 60 seconds before a sync
60 will occur. <maxdelays> may be zero, and <delayinterval> must
61 be 1 or greater.
62 directory <directory>
64 Specify the directory where the LDBM files containing this data‐
65 base and associated indexes live. A separate directory must be
66 specified for each database. The default is /var/openldap-data.
67 index {<attrlist>|default} [pres,eq,approx,sub,<special>]
69 Specify the indexes to maintain for the given attribute (or list
70 of attributes). Some attributes only support a subset of
71 indexes. If only an <attr> is given, the indices specified for
72 default are maintained. Note that setting a default does not
73 imply that all attributes will be indexed. Also, for best per‐
74 formance, an eq index should always be configured for the
75 objectClass attribute.
76 A number of special index parameters may be specified. The
78 index type sub can be decomposed into subinitial, subany, and
79 subfinal indices. The special type notags (or nolang) may be
80 specified to disallow use of this index by subtypes with tagging
81 options (such as language options). The special type nosubtypes
82 may be specified to disallow use of this index by named sub‐
83 types. Note: changing index settings requires rebuilding
84 indices, see slapindex(8).
85 mode <integer>
87 Specify the file protection mode that newly created database
88 index files should have. The default is 0600.
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91 The ldbm backend honors access control semantics as indicated in
92 slapd.access(5).
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95 /etc/openldap/slapd.conf
96 default slapd configuration file
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99 slapd.conf(5), slapd(8), slapadd(8), slapcat(8), slapindex(8).
100OpenLDAP 2.3.34 2007/2/16 SLAPD-LDBM(5)