LDAP Multi-master Replication Considered Harmful

Document Type Expired Internet-Draft (individual)
Last updated 2004-02-04
Stream (None)
Intended RFC status (None)
Expired & archived
pdf htmlized bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Over the last few years there has been significant development of Lightweight Directory Access Protocol (LDAP) replication mechanisms supporting a multi-master service model. While multi-master replication may be useful in some situations, the deployment of multi-master replication alters the standard LDAP service model in a manner which can be harmful. Specifically, the LDAP service model properties of atomicity, consistency, isolation, and durability (ACID) would be lost. This memo discusses the LDAP service model, how multi-master replication alters the service model, and how this alteration is harmful to existing directory applications.


Kurt Zeilenga (kurt.zeilenga@isode.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)