In a two-part article series entitled “Technical Deep Dive Into Apache Tajo“, HadoopSphere.com conducts a Q&A with Dr. Hyunsik Choi, PMC Chair of Apache Tajo. In the first article of the series, Choi explains Tajo’s design logic, including its unique distributed processing framework, pluggable storage manager, and advanced query optimization capabilities.

see: http://www.hadoopsphere.com/2015/02/technical-deep-dive-into-apache-tajo.html