The LDAP licensing model defines how access to Lightweight Directory Access Protocol (LDAP) services is regulated, measured, and enforced. It governs resource usage, user counts, and connection limits. Understanding it is essential if your infrastructure depends on authenticated queries, secure data retrieval, and central identity management.
License types vary. Some vendors offer per-user licensing, counting individual entries in the directory. Others enforce concurrent connection licensing, limiting the number of simultaneous LDAP binds. There are also processor-based and site-wide licenses, designed for high-scale environments. Each model affects costs, scalability, and compliance protocols.
In per-user models, cost increases directly with the total accounts stored. Concurrent user models allow unlimited directory entries but restrict active sessions. Processor-based licensing ties rights to the server’s hardware, useful when LDAP traffic is heavy but variable. Site-wide licenses remove most internal restrictions, but they require higher upfront investment.
The licensing model can influence architecture decisions. High connection-latency environments often benefit from concurrent models with pooled sessions. Large enterprises running distributed LDAP servers may turn to site-wide licensing for operational simplicity.