slapd-ldbm(5)

     SLAPD-LDBM(5)            OpenLDAP 2.1.12            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
          BerkeleyDB, 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 database 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 security.  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 activity 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

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     SLAPD-LDBM(5)            OpenLDAP 2.1.12            SLAPD-LDBM(5)

               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 database and associated indexes live.  A separate
               directory must be specified for each database.  The
               default is /usr/lib/openldap/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 ALSO
          slapd.conf(5), slapd(8), slapadd(8), slapcat(8),
          slapindex(8).

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