====== LDAP run-time configuration (RTC) cn=config ======

OpenLDAP version 2.3 introduced an optional feature whereby configuration may be performed at run-time using a DIT (Directory Information Tree) entry called cn=config. This article explains how to enable and use the cn=config DIT aka run-time configuration (RTC).


===== Enabling cn=config run-time configuration features =====
There is an online tutorial on this [[http://www.zytrax.com/books/ldap/ch6/slapd-config.html|here]].


===== Using cn=config to change slapd parameters =====

This is an example that shows how to use the run-time configuration feature or openldap to change parameters. In this example, we are changing the intial value (16) of the parameter olcDbSearchStack to 32.

==== Find the parameter you want to change : ====

This is how you check current value of a configuration parameter.

<code>
ldapsearch -W -x -D cn=admin,cn=config -b cn=config | olcDbSearchStack
</code>

==== Change the parameter : ====
Now this is how you update the value of the parameter olcDbSearchStack.

<code>
ldapmodify -x -D cn=admin,cn=config -W
dn: olcDatabase={1}bdb,cn=config
replace: olcDbSearchStack
olcDbSearchStack: 32
</code>


{{tag>howto services}}


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