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Version: 2010/04/24 (fedora - 01/12/10)

Section: 5 (Format de fichier)


slapo-sssvlv - Server Side Sorting and Virtual List View overlay to slapd




This overlay implements the LDAP Server Side Sorting (RFC2891) control as well as the Virtual List View control. It also replaces the default implementation of the LDAP PagedResults (RFC2696) control, to ensure that it works with Sorting. The overlay can be used with any backend or globally for all backends.

Since a complete result set must be generated in memory before sorting can be performed, processing sort requests can have a large impact on the server's memory use. As such, any connection is limited to having only one sort request active at a time. Additional limits may be configured as described below.


These slapd.conf options apply to the SSSVLV overlay. They should appear after the overlay directive.
sssvlv-max <num>
Set the maximum number of concurrent sort requests allowed across all connections. The default is one half of the number of server threads.
sssvlv-maxkeys <num>
Set the maximum number of keys allowed in a sort request. The default is 5.


default slapd configuration file
default slapd configuration directory


slapd.conf(5), slapd-config(5).

"OpenLDAP Administrator's Guide" (

IETF LDAP Virtual List View proposal by D. Boreham, J. Sermersheim, and A. Kashi in IETF document "draft-ietf-ldapext-ldapv3-vlv-09.txt".


Howard Chu