SLAPD-LDBM(5)SLAPD-LDBM(5)NAME
slapd-ldbm - LDBM backend to slapd
SYNOPSIS
/etc/openldap/slapd.conf
DESCRIPTION
The LDBM backend to slapd(8) is a database which uses one of Berke‐
leyDB, GNU DBM, MDBM or NDBM to store data. It makes extensive use of
indexing and caching to speed data access.
CONFIGURATION
These slapd.conf options apply to the LDBM backend database. That is,
they must follow a "database ldbm" line and come before any subsequent
"backend" or "database" lines. Other database options are described in
the slapd.conf(5) manual page.
cachesize <integer>
Specify the size in entries of the in-memory cache maintained by
the LDBM backend database instance. The default is 1000
entries.
dbcachesize <integer>
Specify the size in bytes of the in-memory cache associated with
each open index file. If not supported by the underlying data‐
base method, this option is ignored without comment. The
default is 100000 bytes.
dbnolocking
Specify that no database locking should be performed. Enabling
this option may improve performance at the expense of data secu‐
rity. Do NOT run any slap tools while slapd is running.
dbnosync
Specify that on-disk database contents should not be immediately
synchronized with in memory changes. Enabling this option may
improve performance at the expense of data security.
dbsync <frequency> <maxdelays> <delayinterval>
Flush dirty database buffers to disk every <seconds> seconds.
Implies dbnosync (ie. indvidual updates are no longer written to
disk). It attempts to avoid syncs during periods of peak activ‐
ity by waiting <delayinterval> seconds if the server is busy,
repeating this delay up to <maxdelays> times before proceeding.
It is an attempt to provide higher write performance with some
amount of data security. Note that it may still be possible to
get an inconsistent database if the underlying engine fills its
cache and writes out individual pages and slapd crashes or is
killed before the next sync. <maxdelays> and <delayinterval>
are optional and default to 12 and 5 respectively, giving a
total elapsed delay of 60 seconds before a sync will occur.
<maxdelays> may be zero, and <delayinterval> must be 1 or
greater.
directory <directory>
Specify the directory where the LDBM files containing this data‐
base and associated indexes live. A separate directory must be
specified for each database. The default is /var/db/openl‐
dap/openldap-data.
index {<attrlist>|default} [pres,eq,approx,sub,<special>]
Specify the indexes to maintain for the given attribute (or list
of attributes). Some attributes only support a subset of
indexes. If only an <attr> is given, the indices specified for
default are maintained. Note that setting a default does not
imply that all attributes will be indexed.
A number of special index parameters may be specified. The
index type sub can be decomposed into subinitial, subany, and
subfinal indices. The special type nolang may be specified to
disallow use of this index by language subtypes. The special
type nosubtypes may be specified to disallow use of this index
by named subtypes. Note: changing index settings requires
rebuilding indices, see slapindex(8).
mode <integer>
Specify the file protection mode that newly created database
index files should have. The default is 0600.
FILES
/etc/openldap/slapd.conf
default slapd configuration file
SEE ALSOslapd.conf(5), slapd(8), slapadd(8), slapcat(8), slapindex(8).
OpenLDAP 2.1.X RELEASEDATE SLAPD-LDBM(5)
