Couchbase: Understanding group_level in View Queries with Couchbase Server 2.0 by Roberto Zicari · Published January 1, 2013 · Updated February 16, 2014 LINK
DataStax Enterprise 4.0 In-Memory Option A look at performance, use cases, and anti-patterns June 5, 2014 by Roberto Zicari · Published June 5, 2014 · Last modified February 12, 2015
NoSQL Database Technology March 1, 2011 by Roberto Zicari · Published March 1, 2011 · Last modified February 16, 2014
Pure Storage, Couchbase, and Node.js User Profile Store December 21, 2014 by Roberto Zicari · Published December 21, 2014