"BlinkDB can execute a range of queries over a real-world query trace on up to 17 TB of data and 100 nodes in 2 seconds, with an error of 2–10%"

17 TB on 100 nodes? That a lot of nodes to hold 17 TB; on average 174 GB-ish of data each.

The speed is super impressive, but using 100 nodes makes this look more like a parallel processing achievement than "big data".