Couchbase customer presentations (LinkedIn, Orbitz, McGraw-Hill, and others.) by Roberto Zicari · Published January 1, 2013 · Updated February 16, 2014 How they are using Couchbase at their organizations. You can view them here: LINK
Inside MarkLogic Server. Its data model, indexing system, update model, and operational behaviors. Revision 6 January 1, 2011 by Roberto Zicari · Published January 1, 2011 · Last modified February 16, 2014
Project Voldemort June 1, 2009 by Roberto Zicari · Published June 1, 2009 · Last modified February 16, 2014