Recently Carla Schroder wrote a three part series of articles on using Fedora directory server. She has some nice things to say about the server:

FDS scales nicely from tiny test systems to huge enterprise systems, which comes as no surprise to anyone who knows its history. It began life as the Netscape directory server (NDS), then became the iPlanet directory server, and then the SunONE directory server. You’ll find all of these ancestral LDAP servers still in service, handling very large loads with ease. To quote the FDS Web site: “The Fedora directory server is hardened by real world use, full featured, scales like a banshee, and already handles many of the largest LDAP deployments in the world.” So you could start your LDAP education with FDS, and stick with it as your needs grow.

Check out the articles here: