SLAPD-LDBM(5)             FILE FORMATS              SLAPD-LDBM(5)


     slapd-ldbm - LDBM backend to slapd




     The LDBM backend to slapd(8) is the database  backend  which
     is  easiest  to  configure.   However, it does not offer the
     data durability features of the BDB backend.  It uses Berke-
     ley  DB  or  GDBM  to store data.  It makes extensive use of
     indexing and caching to speed data access.


     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

     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  asso-
          ciated  with each open index file.  If not supported by
          the underlying database method, this option is  ignored
          without comment.  The default is 100000 bytes.

          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.

          Specify that on-disk database contents  should  not  be
          immediately  synchronized with in memory changes.  Ena-
          bling  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 <delayinter-
          val> 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

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          be possible to get  an  inconsistent  database  if  the
          underlying  engine fills its cache and writes out indi-
          vidual 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 LOCALSTATEDIR/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  attri-
          butes 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  notags
          (or  nolang)  may  be specified to disallow use of this
          index  by  subtypes  with  tagging  options  (such   as
          language  options).  The special type nosubtypes may be
          specified to disallow use of this index by  named  sub-
          types.  Note: changing index settings requires rebuild-
          ing indices, see slapindex(8).

     mode <integer>
          Specify the file protection  mode  that  newly  created
          database index files should have.  The default is 0600.


          default slapd configuration file


     slapd.conf(5),  slapd(8),  slapadd(8),  slapcat(8),  slapin-

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