SLAPD-BDB(5)							File Formats Manual						      SLAPD-BDB(5)

NAME

       slapd-bdb - BDB backend to slapd

SYNOPSIS

       /etc/openldap/slapd.conf

DESCRIPTION

       The BDB backend to slapd(8) is the recommended backend for a normal slapd database.  It uses the Sleepycat BerkelyDB package to store data.
       It makes extensive use of indexing and caching to speed data access.

CONFIGURATION

       These slapd.conf options apply to the BDB backend database.  That is, they must follow a "database bdb" 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 BDB backend database instance.  The default is 1000 entries.

       checkpoint <kbyte> <min>
	      Specify  the  frequency for checkpointing the database transaction log.  A checkpoint operation flushes the database buffers to disk
	      and writes a checkpoint record in the log.  The checkpoint will occur if either <kbyte> data has been written or <min> minutes  have
	      passed  since  the  last checkpoint.  Both arguments default to zero, in which case they are ignored.  See the Berkeley DB reference
	      guide for more details.

       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.

       directory <directory>
	      Specify the directory where the BDB files containing this database and associated indexes live.  A separate directory must be speci-
	      fied for each database.  The default is /var/db/openldap/openldap-data.

       dirtyread
	      Allow reads of modified but not yet committed data.  Usually transactions are isolated to prevent other  operations  from  accessing
	      uncommitted  data.   This option may improve performance, but may also return inconsistent results if the data comes from a transac-
	      tion that is later aborted.  In this case, the modified data is discarded and a subsequent search will return a different result.

       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).

       lockdetect {oldest|youngest|fewest|random|default}
	      Specify which transaction to abort when a deadlock is detected.  The default is the same as random.

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

       searchstack <depth>
	      Specify  the depth of the stack used for search filter evaluation.  Search filters are evaluated on a stack to accomodate nested AND
	      / OR clauses. An individual stack is assigned to each server thread.  The depth of the stack determines how complex a filter can	be
	      evaluated  without requiring any additional memory allocation. Filters that are nested deeper than the search stack depth will cause
	      a separate stack to be allocated for that particular search operation. These allocations can have a major negative impact on  server
	      performance,  but  specifying too much stack will also consume a great deal of memory.  Each search stack uses 512K bytes per level.
	      The default stack depth is 16, thus 8MB per thread is used.

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-BDB(5)