.TH SLAPD-BDB 5 "RELEASEDATE" "OpenLDAP LDVERSION"
.\" Copyright 1998-2002 The OpenLDAP Foundation All Rights Reserved.
.\" Copying restrictions apply.  See COPYRIGHT/LICENSE.
.\" $OpenLDAP$
.SH NAME
slapd-bdb \- BDB backend to slapd
.SH SYNOPSIS
ETCDIR/slapd.conf
.SH DESCRIPTION
The BDB backend to
.BR 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.
.SH CONFIGURATION
These
.B 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
.BR slapd.conf (5)
manual page.
.TP
.B cachesize <integer>
Specify the size in entries of the in-memory cache maintained 
by the BDB backend database instance.
The default is 1000 entries.
.TP
.B 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.
.TP
.B 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.
.TP
.B directory <directory>
Specify the directory where the BDB files containing this database and
associated indexes live.
A separate directory must be specified for each database.
The default is
.BR LOCALSTATEDIR/openldap-data .
.TP
.B 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 transaction that is later aborted.
In this case, the modified data is discarded and a subsequent search
will return a different result.
.TP
.B
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 \fBdefault\fR
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
.B sub
can be decomposed into
.BR subinitial ,
.BR subany ,\ and
.B subfinal
indices.
The special type
.B nolang
may be specified to disallow use of this index by language subtypes.
The special type
.B nosubtypes
may be specified to disallow use of this index by named subtypes.
Note: changing index settings requires rebuilding indices, see
.BR slapindex (8).
.TP
.B lockdetect {oldest|youngest|fewest|random|default}
Specify which transaction to abort when a deadlock is detected.
The default is the same as
.BR random .
.TP
.B mode <integer>
Specify the file protection mode that newly created database 
index files should have.
The default is 0600.
.SH FILES
.TP
ETCDIR/slapd.conf
default slapd configuration file
.SH SEE ALSO
.BR slapd.conf (5),
.BR slapd (8),
.BR slapadd (8),
.BR slapcat (8),
.BR slapindex (8).