1. 2017 big-data and analytics forecast. https://bit.ly/2TtKyjB
2. Apache orc spec. v1. https://bit.ly/2J5BIkh
3. Apache spark join guidelines and performance tuning. https://bit.ly/2Jd87We
4. Band join. https://bit.ly/2kixJJn
5. Bitmap join indexes in oracle. https://bit.ly/2TLBBTF