Comparisons anchored on OpenLDAP, the OpenLDAP Foundation's LDAPv3 directory server and tools: against 389 Directory Server and LLDAP.
The two general-purpose open-source LDAP servers compared: OpenLDAP's slapd with the MDB backend, overlays and a 2.6 LTS line, against 389 Directory Server's multi-supplier replication, online configuration changes and Cockpit console. Covers Red Hat's removal of the OpenLDAP server package in RHEL 8, the openldap_to_ds migration tool and what it cannot move, and which suits a new directory.
A complete LDAPv3 server with replication, overlays and a load-balancing proxy against LLDAP's deliberately partial LDAP interface with a built-in web UI and SQLite, MySQL or PostgreSQL storage. Covers what LLDAP does not implement, setup and operating effort, support options and which applications each can back.
OpenLDAP against Microsoft Active Directory as the central directory: what each provides beyond LDAP (Kerberos, Group Policy, Windows domain join), licensing and server costs, Linux and application authentication and when a mixed estate keeps both.
Choosing an OpenLDAP high availability design: mirror mode with a hot standby behind a load balancer versus N-Way Multi-Provider across sites, plus delta-syncrepl for consumers. Covers consistency, partitions, clock and server ID rules and operations.
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