Fast Hadoop Analytics (Cloudera Impala vs Spark/Shark vs Apache Drill)

Question

I want to do some \"near real-time\" data analysis (OLAP-like) on the data in a HDFS.
My research showed that the three mentioned frameworks report significant performance g

Answer 1

Here is an answer of "How does Impala compare to Shark?" from Reynold Xin, the leader of the Shark development effort at UC Berkeley AMPLab.