Apache Tajo™: A big data warehouse system on Hadoop

Dubbed an “SQL-on-Hadoop” solution, Apache Tajo is used for low-latency and scalable ad-hoc queries, online aggregation, and ETL (extract-transform-load process) on large data sets stored on HDFS (Hadoop Distributed File System) and other data sources. By supporting SQL standards and leveraging advanced database techniques, Tajo allows direct control of distributed execution and data flow across a variety of query evaluation strategies and optimization opportunities. Overall, Apache Tajo v0.9 delivers more powerful native SQL support on an even faster platform.

tajo.apache.org