ITS#1749 added BDB options

[openldap] / doc / man / man5 / slapd.conf.5

.TH SLAPD.CONF 5 "26 January 2002" "OpenLDAP LDVERSION"
.\" Copyright 1998-2002 The OpenLDAP Foundation All Rights Reserved.
.\" Copying restrictions apply.  See COPYRIGHT/LICENSE.
.\" $OpenLDAP$
.SH NAME
slapd.conf \- configuration file for slapd, the stand-alone LDAP daemon
.SH SYNOPSIS
ETCDIR/slapd.conf
.SH DESCRIPTION
The file
.B ETCDIR/slapd.conf
contains configuration information for the
.BR slapd (8)
daemon.  This configuration file is also used by the
.BR slurpd (8)
replication daemon and by the SLAPD tools
.BR slapadd (8),
.BR slapcat (8),
and
.BR slapindex (8).
.LP
The
.B slapd.conf
file consists of a series of global configuration options that apply to
.B slapd
as a whole (including all backends), followed by zero or more database
backend definitions that contain information specific to a backend
instance.
.LP
The general format of
.B slapd.conf
is as follows:
.LP
.nf
    # comment - these options apply to every database
    <global configuration options>
    # first database definition & configuration options
    database    <backend 1 type>
    <configuration options specific to backend 1>
    # subsequent database definitions & configuration options
    ...
.fi
.LP
As many backend-specific sections as desired may be included.  Global
options can be overridden in a backend (for options that appear more
than once, the last appearance in the
.B slapd.conf
file is used).  Blank lines and comment lines beginning with a `#'
character are ignored. If a line begins with white space, it is
considered a continuation of the previous line.
.LP
Arguments on configuration lines are separated by white space. If an
argument contains white space, the argument should be enclosed in
double quotes.  If an argument contains a double quote (`"') or a
backslash character (`\\'), the character should be preceded by a
backslash character.
.LP
The specific configuration options available are discussed below in the
Global Configuration Options, General Backend Options, General Database
Options, LDBM Database-Specific Options,
Shell Database-Specific Options, and Password
Database-Specific Options sections.  Refer to the "OpenLDAP
Administrator's Guide" for more details on the slapd configuration
file.
.SH GLOBAL CONFIGURATION OPTIONS
Options described in this section apply to all backends, unless specifically 
overridden in a backend definition. Arguments that should be replaced by 
actual text are shown in brackets <>.
.TP
.B access to <what> [ by <who> <access> <control> ]+
Grant access (specified by <access>) to a set of entries and/or
attributes (specified by <what>) by one or more requestors (specified
by <who>).
See the "OpenLDAP's Administrator's Guide" for details.
.TP
.B allow <features>
Specify a set of features (separated by white space) to
allow (default none).
.B bind_v2
allows acceptance of LDAPv2 bind requests.
.B bind_anon_cred
allows anonymous bind when credentials are not empty (e.g.
when DN is empty).
.B bind_anon_dn
allows unauthenticated (anonymous) bind when DN is not empty.
.TP
.B argsfile <filename>
The ( absolute ) name of a file that will hold the 
.B slapd
server's command line options
if started without the debugging command line option.
.HP
.hy 0
.B attributetype (\ <oid> [NAME\ <name>] [OBSOLETE]\
 [DESC\ <description>]\
 [SUP\ <oid>] [EQUALITY\ <oid>] [ORDERING\ <oid>]\
 [SUBSTR\ <oid>] [SYNTAX\ <oidlen>] [SINGLE\-VALUE] [COLLECTIVE]\
 [NO\-USER\-MODIFICATION] [USAGE\ <attributeUsage>]\ )
.RS
Specify an attribute type using the LDAPv3 syntax defined in RFC 2252.
The slapd parser extends the RFC 2252 definition by allowing string
forms as well as numeric OIDs to be used for the attribute OID and
attribute syntax OID.
(See the
.B objectidentifier
description.) Currently the syntax name parser is case-sensitive.
The known syntax names are:
.RS
.RS
.PD 0
AttributeTypeDescription Audio Binary BitString Certificate CertificateList
CertificatePair DN DeliveryMethod DirectoryString DITContentRuleDescription
DITStructureRuleDescription EnhancedGuide FacsimileTelephoneNumber
GeneralizedTime Guide IA5String Integer MatchingRuleDescription
MatchingRuleUseDescription MailPreference NameAndOptionalUUID
NameFormDescription NumericString ObjectClassDescription OID
OtherMailbox OctetString PostalAddress ProtocolInformation
PresentationAddress PrintableString SupportedAlgorithm TelephoneNumber
TeletexTerminalIdentifier TelexNumber UTCTime LDAPSyntaxDescription
SubstringAssertion NISnetgrouptriple Bootparameter
.PD
.RE
.RE
.RE
.TP
.B concurrency <integer>
Specify a desired level of concurrency.  Provided to the underlying
thread system as a hint.  The default is not to provide any hint.
.TP
.B defaultsearchbase <dn>
Specify a default search base to use when client submits a
non-base search request with an empty base DN.
.TP
.B disallow <features>
Specify a set of features (separated by white space) to
disallow (default none).
.B bind_anon
disables acceptance of anonymous bind requests.
.B bind_simple
disables simple (bind) authentication.
.B bind_krbv4
disables Kerberos V4 (bind) authentication.
.B tls_2_anon
disables Start TLS from forcing session to anonymous status (see also
.BR tls_authc ).
.B tls_authc
disables StartTLS if authenticated (see also
.BR tls_2_anon ).
.TP
.B idletimeout <integer>
Specify the number of seconds to wait before forcibly closing
an idle client connection.  A idletimeout of 0 disables this
feature.  The default is 0.
.TP
.B include <filename>
Read additional configuration information from the given file before
continuing with the next line of the current file.
.TP
.B limits <who> <limit> [<limit> [...]]
Specify time and size limits based on who initiated an operation.
The argument
.B who
can be any of
.RS
.RS
.TP
anonymous | users | [dn[.<style>]=]<pattern>

.RE
with
.RS
.TP
<style> ::= exact | base | one | subtree | children | regex | anonymous

.RE
.B Anonymous
is hit when a search is performed without prior binding;
.B users
is hit when a search is performed by a successfully bound user;
otherwise a
.B regex
dn pattern is assumed unless otherwise specified by qualifying 
the (optional) key string
.B dn
with 
.B exact
or
.B base
(which are synonims), to require an exact match; with
.BR one, 
to require exactly one level of depth match; with
.BR subtree,
to allow any level of depth match, including the exact match; with
.BR children,
to allow any level of depth match, not including the exact match;
.BR regex
explicitly requires the (default) match based on regular expression
pattern, as detailed in
.BR regex(7).
Finally,
.B anonymous
matches unbound operations; the 
.B pattern
field is ignored.
The same behavior is obtained by using the 
.B anonymous
form of the
.B who
clause.

The currently supported limits are 
.B size
and 
.BR time.

The syntax for time limits is 
.BR time[.{soft|hard}]=<integer> ,
where 
.BR integer
is the number of seconds slapd will spend answering a search request.
If no time limit is explicitly requested by the client, the 
.BR soft
limit is used; if the requested time limit exceedes the
.BR hard
limit, an "Unwilling to perform" is returned.
If the
.BR hard
limit is set to 0 or to the keyword "soft", the soft limit is used 
in either case; if it is set to -1 or to the keyword "none", 
no hard limit is enforced.
Explicit requests for time limits smaller or equal to the
.BR hard 
limit are honored.
If no flag is set, the value is assigned to the 
.BR soft 
limit, and the
.BR hard
limit is set to zero, to preserve the original behavior.

The syntax for size limits is
.BR size[.{soft|hard|unchecked}]=<integer> ,
where
.BR integer
is the maximum number of entries slapd will return answering a search 
request.
If no size limit is explicitly requested by the client, the
.BR soft
limit is used; if the requested size limit exceedes the
.BR hard
limit, an "Unwilling to perform" is returned.
If the 
.BR hard
limit is set to 0 or to the keyword "soft", the soft limit is used 
in either case; if it is set to -1 or to the keyword "none", 
no hard limit is enforced.
Explicit requests for size limits smaller or equal to the
.BR hard
limit are honored.
The
.BR unchecked
flag sets a limit on the number of candidates a search request is allowed
to examine.
If the selected candidates exceed the 
.BR unchecked
limit, the search will abort with "Unwilling to perform".
If it is set to -1 or to the keyword "none", no limit is applied (the default).
If no flag is set, the value is assigned to the
.BR soft 
limit, and the
.BR hard
limit is set to zero, to preserve the original behavior.

In case of no match, the global limits are used.
The default values are the same of
.BR sizelimit
and
.BR timelimit ;
no limit is set on 
.BR unchecked .
.RE
.TP
.B loglevel <integer>
Specify the level at which debugging statements and operation 
statistics should be syslogged (currently logged to the
.BR syslogd (8) 
LOG_LOCAL4 facility).  Log levels are additive, and available levels
are:
.RS
.RS
.PD 0
.TP
.B 1
trace function calls
.TP
.B 2
debug packet handling
.TP
.B 4
heavy trace debugging
.TP
.B 8
connection management
.TP
.B 16
print out packets sent and received
.TP
.B 32
search filter processing
.TP
.B 64
configuration file processing
.TP
.B 128
access control list processing
.TP
.B 256
stats log connections/operations/results
.TP
.B 512
stats log entries sent
.TP
.B 1024
print communication with shell backends
.TP
.B 2048
entry parsing
.PD
.RE
.RE
.HP
.B objectclass ( <oid> [NAME <name>] [DESC <description] [OBSOLETE]\
 [SUP <oids>] [{ ABSTRACT | STRUCTURAL | AUXILIARY }] [MUST <oids>]\
 [MAY <oids>] )
.RS
Specify an objectclass using the LDAPv3 syntax defined in RFC 2252.
The slapd parser extends the RFC 2252 definition by allowing string
forms as well as numeric OIDs to be used for the object class OID.
(See the
.B
objectidentifier
description.)  Object classes are "STRUCTURAL" by default.
.RE
.TP
.B objectidentifier <name> { <oid> | <name>[:<suffix>] }
Define a string name that equates to the given OID. The string can be used
in place of the numeric OID in objectclass and attribute definitions. The
name can also be used with a suffix of the form ":xx" in which case the
value "oid.xx" will be used.
.TP
.B password-hash <hash>
This option sets the hash to be used in generation of user
passwords, stored in userPassword, during processing of
LDAP Password Modify Extended Operations (RFC 3052).
The <hash> must be one of
.BR {SSHA} ,
.BR {SHA} ,
.BR {SMD5} ,
.BR {MD5} ,
and
.BR {CRYPT} .
The default is
.BR {SSHA} .

Note that this option does not alter the normal user applications
handling of userPassword during LDAP Add, Modify, or other LDAP operations.
.TP
.B password\-crypt\-salt\-format <format>
Specify the format of the salt passed to
.BR crypt (3)
when generating {CRYPT} passwords (see
.BR password\-hash )
during processing of LDAP Password Modify Extended Operations (RFC 3062).

This string needs to be in
.BR sprintf (3)
format and may include one (and only one) %s conversion.
This conversion will be substituted with a string random
characters from [A\-Za\-z0\-9./].  For example, "%.2s"
provides a two character salt and "$1$%.8s" tells some
versions of crypt(3) to use an MD5 algorithm and provides
8 random characters of salt.  The default is "%s", which
provides 31 characters of salt.
.TP
.B pidfile <filename>
The ( absolute ) name of a file that will hold the 
.B slapd
server's process ID ( see
.BR getpid (2)
) if started without the debugging command line option.
.TP
.B referral <url>
Specify the referral to pass back when
.BR slapd (8)
cannot find a local database to handle a request.
If specified multiple times, each url is provided.
.TP
.B require <conditions>
Specify a set of conditions (separated by white space) to
require (default none).
The directive may be specified globally and/or per-database.
.B bind
requires bind operation prior to directory operations.
.B LDAPv3
requires session to be using LDAP version 3.
.B authc
requires authentication prior to directory operations.
.B SASL
requires SASL authentication prior to directory operations.
.B strong
requires strong authentication prior to directory operations.
The
.B SASL
and
.B strong
conditions are currently same.
.B none
may be used to require no conditions (useful for clearly globally
set conditions within a particular database).
.TP
.B reverse-lookup on | off
Enable/disable client name reverse lookup (default is 
.BR on 
if compiled with --enable-rlookups).
.TP
.B rootDSE <file>
Specify the name of an LDIF(5) file containing user defined attributes
for the root DSE.  These attributes are returned in addition to the
attributes normally produced by slapd.
.TP
.B sasl-host <fqdn>
Used to specify the fully qualified domain name used for SASL processing.
.TP
.B sasl-realm <realm>
Specify SASL realm.  Default is empty.
.TP
.B sasl-regexp <match> <replace>
Used by the SASL authorization mechanism to convert a SASL authenticated 
username to an LDAP DN. When an authorization request is received, the SASL 
.B USERNAME, REALM, 
and
.B MECHANISM
are taken, when available, and combined into a SASL name of the 
form
.RS
.RS
.TP
.B uid=<UID>[,cn=<REALM>][,cn=<MECH>],cn=AUTHZ

.RE
This SASL name is then compared against the
.B match
regular expression, and if the match is successful, the SASL name is
replaced with the
.B replace
string. If there are wildcard strings in the 
.B match
regular expression that are enclosed in parenthesis, e.g. 
.RS
.RS
.TP
.B uid=(.*)\\\\+realm=.*

.RE
.RE
then the portion of the SASL name that matched the wildcard will be stored
in the numbered placeholder variable $1. If there are other wildcard strings
in parenthesis, the matching strings will be in $2, $3, etc. up to $9. The 
placeholders can then be used in the 
.B replace
string, e.g. 
.RS
.RS
.TP
.B cn=$1,ou=Accounts,dc=$2,dc=$4. 

.RE
.RE
The replaced SASL name can be either a DN or an LDAP URI. If the latter, the slapd
server will use the URI to search its own database, and if the search returns 
exactly one entry, the SASL name is replaced by the DN of that entry.
Multiple 
.B sasl-regexp 
options can be given in the configuration file to allow for multiple matching 
and replacement patterns. The matching patterns are checked in the order they 
appear in the file, stopping at the first successful match.

.B Caution:
Because the plus sign + is a character recognized by the regular expression engine,
and it will appear in SASL names that include a REALM, be careful to escape the
plus sign with a backslash \\+ to remove the character's special meaning.
.RE
.TP
.B sasl-secprops <properties>
Used to specify Cyrus SASL security properties.
The
.B none
flag (without any other properities) causes the flag properites
default, "noanonymous,noplain", to be cleared.
The
.B noplain
flag disables mechanisms susceptible to simple passive attacks.
The
.B noactive
flag disables mechanisms susceptible to active attacks.
The
.B nodict
flag disables mechanisms susceptible to passive dictionary attacks.
The
.B noanonyous
flag disables mechanisms which support anonymous login.
The
.B forwardsec
flag require forward secrecy between sessions.
The
.B passcred
require mechanisms which pass client credentials (and allow
mechanisms which can pass credentials to do so).
The
.B minssf=<factor> 
property specifies the minimum acceptable
.I security strength factor
as an integer approximate to effective key length used for
encryption.  0 (zero) implies no protection, 1 implies integrity
protection only, 56 allows DES or other weak ciphers, 112
allows triple DES and other strong ciphers, 128 allows RC4,
Blowfish and other modern strong ciphers.  The default is 0.
The
.B maxssf=<factor> 
property specifies the maximum acceptable
.I security strength factor
as an integer (see minssf description).  The default is INT_MAX.
The
.B maxbufsize=<size> 
property specifies the maximum security layer receive buffer
size allowed.  0 disables security layers.  The default is 65536.
.TP
.B security <factors>
Specify a set of factors (separated by white space) to require.
An integer value is associated with each factor and is roughly
equivalent of the encryption key length to require.  A value
of 112 is equivalent to 3DES, 128 to Blowfish, etc..
The directive may be specified globally and/or per-database.
.B ssf=<n>
specifies the overall security strength factor.
.B transport=<n>
specifies the transport security strength factor.
.B tls=<n>
specifies the TLS security strength factor.
.B sasl=<n>
specifies the SASL security strength factor.
.B update_ssf=<n>
specifies the overall security strength factor to require for
directory updates.
.B update_transport=<n>
specifies the transport security strength factor to require for
directory updates.
.B update_tls=<n>
specifies the TLS security strength factor to require for
directory updates.
.B update_sasl=<n>
specifies the SASL security strength factor to require for
directory updates.
Note that the
.B transport
factor is measure of security provided by the underlying transport,
e.g. ldapi:// (and eventually IPSEC).  It is not normally used.
.TP
.B sizelimit <integer> 
.TP
.B sizelimit size[.{soft|hard|unchecked}]=<integer> [...]
Specify the maximum number of entries to return from a search operation.
The default size limit is 500.
The second format allows a fine grain setting of the size limits.
Extra args can be added on the same line.
See
.BR limits
for an explanation of the different flags.
.TP
.B sockbuf_max_incoming <integer>
Specify the maximum incoming LDAP PDU size for anonymous sessions.
The default is 262143.
.TP
.B sockbuf_max_incoming_auth <integer>
Specify the maximum incoming LDAP PDU size for authenticated sessions.
The default is 4194303.
.TP
.B srvtab <filename>
Specify the srvtab file in which the kerberos keys necessary for
authenticating clients using kerberos can be found. This option is only
meaningful if you are using Kerberos authentication.
.TP
.B threads <integer>
Specify the maximum size of the primary thread pool.
The default is 32.
.TP
.B timelimit <integer>
.TP
.B timelimit time[.{soft|hard}]=<integer> [...]
Specify the maximum number of seconds (in real time)
.B slapd
will spend answering a search request.  The default time limit is 3600.
The second format allows a fine grain setting of the time limits.
Extra args can be added on the same line.
See
.BR limits
for an explanation of the different flags.
.SH TLS OPTIONS
If
.B slapd
is built with support for Transport Layer Security, there are more options
you can specify.
.TP
.B TLSCipherSuite <cipher-suite-spec>
Permits configuring what ciphers will be accepted and the preference order.
<cipher-suite-spec> should be a cipher specification for OpenSSL.  Example:

TLSCipherSuite HIGH:MEDIUM:+SSLv2

To check what ciphers a given spec selects, use:

openssl ciphers -v <cipher-suite-spec>
.TP
.B TLSCACertificateFile <filename>
Specifies the file that contains certificates for all of the Certificate
Authorities that
.B slapd
will recognize.
.TP
.B TLSCertificateFile <filename>
Specifies the file that contains the
.B slapd
server certificate.
.TP
.B TLSCertificateKeyFile <filename>
Specifies the file that contains the
.B slapd
server private key that matches the certificate stored in the
.B TLSCertificateFile
file.  Currently, the private key must not be protected with a password, so
it is of critical importance that it is protected carefully. 
.TP
.B TLSRandFile <filename>
Specifies the file to obtain random bits from when /dev/[u]random
is not available.  Generally set to the name of the EGD/PRNGD socket.
The environment variable RANDFILE can also be used to specify the filename.
.TP
.B TLSVerifyClient <level>
Specifies what checks to perform on client certificates in an
incoming TLS session, if any.
The
.B <level>
can be specified as one of the following keywords:
.RS
.TP
.B never
This is the default.
.B slapd
will not ask the client for a certificate.
.TP
.B allow
The client certificate is requested.  If no certificate is provided,
the session proceeds normally.  If a bad certificate is provided,
it will be ignored and the session proceeds normally.
.TP
.B try
The client certificate is requested.  If no certificate is provided,
the session proceeds normally.  If a bad certificate is provided,
the session is immediately terminated.
.TP
.B demand | hard | true
These keywords are all equivalent, for compatibility reasons.
The client certificate is requested.  If no certificate is provided,
or a bad certificate is provided, the session is immediately terminated.

Note that a valid client certificate is required in order to use the
SASL EXTERNAL authentication mechanism with a TLS session.  As such,
a non-default
.B TLSVerifyClient
setting must be chosen to enable SASL EXTERNAL authentication.
.RE
.SH GENERAL BACKEND OPTIONS
Options in this section only apply to the configuration file section
for the specified backend.  They are supported by every
type of backend.
.TP
.B backend <databasetype>
Mark the beginning of a backend definition. <databasetype>
should be one of
.B bdb,
.B dnssrv,
.B ldap,
.B ldbm,
.B meta,
.B monitor,
.B null,
.B passwd,
.B perl,
.B shell,
.B sql,
or
.B tcl,
depending on which backend will serve the database.

.SH GENERAL DATABASE OPTIONS
Options in this section only apply to the configuration file section
for the database in which they are defined.  They are supported by every
type of backend.
.TP
.B database <databasetype>
Mark the beginning of a new database instance definition. <databasetype>
should be one of
.B bdb,
.B dnssrv,
.B ldap,
.B ldbm,
.B meta,
.B monitor,
.B null,
.B passwd,
.B perl,
.B shell,
.B sql,
or
.B tcl,
depending on which backend will serve the database.
.TP
.B lastmod on | off
Controls whether
.B slapd
will automatically maintain the 
modifiersName, modifyTimestamp, creatorsName, and 
createTimestamp attributes for entries.  By default, lastmod is on.
.TP
.B readonly on | off
This option puts the database into "read-only" mode.  Any attempts to 
modify the database will return an "unwilling to perform" error.  By
default, readonly is off.
.HP
.B replica host=<hostname>[:port] [tls=yes|critical]
.B [suffix=<suffix> [...]]
.B bindmethod=simple|sasl [binddn=<simple DN>] [credentials=<simple password>]
.B [saslmech=<SASL mech>] [secopts=<options>] [realm=<realm>]
.B [authcId=<authentication ID>] [authcId=<authentication ID>]
.B [attr[!]=<attr list>]
.RS
Specify a replication site for this database.  Refer to the "OpenLDAP 
Administrator's Guide" for detailed information on setting up a replicated
.B slapd
directory service. Zero or more
.B suffix
instances can be used to select the subtrees that will be replicated
(defaults to all the database). A
.B bindmethod
of
.B simple
requires the options
.B binddn 
and
.B credentials  
and should only be used when adequate security services 
(e.g TLS or IPSEC) are in place. A
.B bindmethod 
of
.B sasl 
requires the option
.B saslmech. 
If the 
.B mechanism
will use Kerberos, a kerberos instance should be given in 
.B authcId.
An
.B attr list
can be given after the 
.B attr
keyword to allow the selective replication of the listed attributes only;
if the optional 
.B !
mark is used, the list is considered exclusive, i.e. the listed attributes
are not replicated.
If an objectClass is listed, all the related attributes
are (are not) replicated.
.RE
.TP
.B replogfile <filename>
Specify the name of the replication log file to log changes to.  
The replication log is typically written by
.BR slapd (8)
and read by
.BR slurpd (8).
See
.BR slapd.replog (5)
for more information.  The specified file should be located
in a directory with limited read/write/execute access as the replication
logs may contain sensitive information.
.TP
.B rootdn <dn>
Specify the distinguished name that is not subject to access control 
or administrative limit restrictions for operations on this database.
This DN may or may not be associated with an entry.  An empty root
DN (the default) specifies no root access is to be granted.  It is
recommended that the rootdn only be specified when needed (such as
when initially populating a database).  If the rootdn is within
a namingContext (suffix) of the database, a simple bind password
may also be provided using the
.B rootpw
directive.
.TP
.B rootpw <password>
Specify a password (or hash of the password) for the rootdn.  If
the rootdn is not within the namingContext of the database, the
provided password is ignored.
This option accepts all RFC 2307 userPassword formats known to
the server (see 
.B password-hash
desription) as well as cleartext.
.BR slappasswd (8) 
may be used to generate a hash of a password.  Cleartext
and \fB{CRYPT}\fP passwords are not recommended.  If empty
(the default), authentication of the root DN is by other means
(e.g. SASL).  Use of SASL is encouraged.
.TP
.B suffix <dn suffix>
Specify the DN suffix of queries that will be passed to this 
backend database.  Multiple suffix lines can be given and at least one is 
required for each database definition.
.TP
.B subordinate
Specify that the current backend database is a subordinate of another
backend database. A subordinate database may have only one suffix. This
option may be used to glue multiple databases into a single namingContext.
If the suffix of the current database is within the namingContext of a
superior database, searches against the superior database will be
propagated to the subordinate as well. All of the databases
associated with a single namingContext should have identical rootdns.
Behavior of other LDAP operations is unaffected by this setting. In
particular, it is not possible to use moddn to move an entry from
one subordinate to another subordinate within the namingContext.
.TP
.B updatedn <dn>
This option is only applicable in a slave
.B slapd.
It specifies the DN allowed to make changes to the replica (typically,
this is the DN
.BR slurpd (8)
binds as when making changes to the replica).
.TP
.B updateref <url>
Specify the referral to pass back when
.BR slapd (8)
is asked to modify a replicated local database.
If specified multiple times, each url is provided.
.\" .SH LDBM BACKEND-SPECIFIC OPTIONS
.\" Options in this category only apply to the LDBM backend. That is,
.\" they must follow "backend ldbm" line and come before any subsequent
.\" "backend" or "database" lines.  The LDBM backend is a high-performance
.\" database that makes extensive use of indexing and caching to speed
.\" data access. 
.SH BDB DATABASE-SPECIFIC OPTIONS
Options in this category only apply to the BDB databases. That is,
they must follow "database bdb" line and come before any subsequent
"backend" or "database" lines.
.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>]
See the description for LDBM.
.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 LDBM DATABASE-SPECIFIC OPTIONS
Options in this category only apply to the LDBM databases. That is,
they must follow "database ldbm" line and come before any subsequent
"backend" or "database" lines.
.TP
.B cachesize <integer>
Specify the size in entries of the in-memory cache maintained 
by the LDBM backend database instance.  The default is 1000 entries.
.TP
.B 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.
.TP
.B 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.
.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 dbsync <frequency> <maxdelays> <delayinterval>
Flush dirty database buffers to disk every
.B <seconds>
seconds.  Implies
.B dbnosync
(ie. indvidual updates are no longer written to disk).  It attempts to avoid
syncs during periods of peak activity by waiting
.B <delayinterval>
seconds if the server is busy, repeating this delay up to
.B <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 writes out individual
pages and slapd crashes or is killed before the next sync.
.B <maxdelays>
and
.B <delayinterval>
are optional and default to
.B 12
and
.B 5
respectively, giving a total elapsed delay of 60 seconds before a sync
will occur.
.B <maxdelays>
may be zero, and
.B <delayinterval>
must be 1 or greater.
.TP
.B 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
.BR LOCALSTATEDIR/openldap-data .
.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 mode <integer>
Specify the file protection mode that newly created database 
index files should have.  The default is 0600.
.SH SHELL DATABASE-SPECIFIC OPTIONS
Options in this category only apply to the SHELL backend database. That is,
they must follow a "database shell" line and come before any subsequent
"backend" or "database" lines.  The Shell backend executes external programs to
implement operations, and is designed to make it easy to tie an existing
database to the
.B slapd
front-end.
.TP
.B bind <pathname>
.TP
.B unbind <pathname>
.TP
.B search <pathname>
.TP
.B compare <pathname>
.TP
.B modify <pathname>
.TP
.B modrdn <pathname>
.TP
.B add <pathname>
.TP
.B delete <pathname>
.TP
.B abandon <pathname>
These options specify the pathname of the command to execute in response 
to the given LDAP operation.

Note that you need only supply configuration lines for those commands you
want the backend to handle. Operations for which a command is not
supplied will be refused with an "unwilling to perform" error.
.SH PASSWORD DATABASE-SPECIFIC OPTIONS
Options in this category only apply to the PASSWD backend database.
That is, they must follow a "database passwd" line and come before any
subsequent "backend" or "database" lines.  The PASSWD database serves up the user
account information listed in the system
.BR passwd (5)
file.
.TP
.B file <filename>
Specifies an alternate passwd file to use.  The default is
.B /etc/passwd.
.SH OTHER DATABASE-SPECIFIC OPTIONS
Other databases may allow specific configuration options; they will be
documented separately since most of these databases are very specific
or experimental.
.SH EXAMPLE
"OpenLDAP Administrator's Guide" contains an annotated
example of a configuration file.
.SH FILES
ETCDIR/slapd.conf
.SH SEE ALSO
.BR ldap (3),
.BR slapd.replog (5),
.BR slapd.access (5),
.BR locale (5),
.BR passwd (5),
.BR slapd (8),
.BR slapadd (8),
.BR slapcat (8),
.BR slapindex (8),
.BR slappassword (8),
.BR slurpd (8),
.LP
"OpenLDAP Administrator's Guide" (http://www.OpenLDAP.org/doc/admin/)
.SH ACKNOWLEDGEMENTS
.B      OpenLDAP
is developed and maintained by The OpenLDAP Project (http://www.openldap.org/).
.B      OpenLDAP
is derived from University of Michigan LDAP 3.3 Release.