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Apache Tajo


3 April 2014

Apache Tajo

Tajo is a relational and distributed data warehouse system for Hadoop. Tajo is designed for low-latency and scalable ad-hoc queries, online aggregation and ETL on large-data sets by leveraging advanced database techniques. It supports SQL standards. It has its own query engine which allows direct control of distributed execution and data flow. As a result, Tajo has a variety of query evaluation strategies and more optimization opportunities. In addition, Tajo will have a native columnar execution and and its optimizer.





  • Java 1.6 or higher
  • Hadoop 2.0.3-alpha or higher

Mailing lists

  • - To discuss and ask general development issues.

  • - To discuss and ask end-user questions/issues.

  • - To see notifications made in the Tajo issue tracking system, review board, and Jenkins CI.

  • - To monitor commits to the source repository.

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