MySQL vs MongoDB Choosing right technology for your application by Roberto Zicari · April 6, 2017 Peter Zaitsev, CEO Percona, presented at SCALE 15x on March 3, 2017. Download Slides
Couchbase: Understanding group_level in View Queries with Couchbase Server 2.0 January 1, 2013 by Roberto Zicari · Published January 1, 2013 · Last modified February 16, 2014
The Short Guide to MySQL HA Options January 1, 2011 by Roberto Zicari · Published January 1, 2011 · Last modified February 16, 2014
Cassandra January 1, 2008 by Roberto Zicari · Published January 1, 2008 · Last modified February 16, 2014