Benefits Using Directory Server Resource Kit : It provides a tool called ldclt.
The ldclt tool is a powerful and flexible client for creating and running stress tests on Lightweight Directory Access Protocol (LDAP) directory servers.
The tool generates LDIF files and performs searches, additions, modifications, deletions, or renaming using complex randomizing capabilities to simulate real usage conditions.
The ldclt (LDAP client) is a multithreaded application developed using the Sun ONE LDAP SDK for C.
It is designed to be used in automated tests on a directory; its command-line interface is extensive and suitable for scripting. This will allow you to run complex tests automatically and compare performance over time for reliability.