The following paper and presentation are now available from the OpenLDAP Publications web page: http://www.openldap.org/pub/ Title: OpenLDAP 2.4 Highlights: Features of the Upcoming Release Author: Howard Chu, Symas Corp. URL: http://www.openldap.org/pub/hyc/LDAPcon2007.pdf (paper) URL: http://www.openldap.org/pub/hyc/LDAPcon2007s.pdf Abstract: OpenLDAP is the premier implementation of LDAP client and server software, providing full support of LDAPv3 and most popular standard and draft (work in progress) LDAP extensions. It has evolved over the years from its origins in the University of Michigan's reference implementation of LDAPv2 as a vehicle for experimentation into a mature, commercial grade package capable of supporting the most demanding environments. The current release has been proven to scale to hundreds of millions of objects in data volumes in excess of a terabyte, with performance in excess of 22,000 queries per second at sub-millisecond latencies. Reliability in production deployments has been flawless, with hardware failure being the principal cause of unscheduled downtime. This paper presents a brief overview of features in the newest release, along with a brief history and motivation for the new developments.