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OpenDarwin 7.2.1 - man page for slapd-ldbm (opendarwin section 5)

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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 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  underly-
	      ing  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 database and associated
	      indexes live.  A separate directory must	be  specified  for  each  database.   The
	      default is /var/db/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).

OpenLDAP 2.1.X				   RELEASEDATE				    SLAPD-LDBM(5)
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