On: Billions wasted on Hadoop startups, the same will eventually be true of Docker

[misterman0]

Which of those indexes/databases should I be using if I want to query over big data using natural language?

[kthejoker2 → misterman0]

This question makes no sense.

First, NLP based search can be executed on top of any engine (APIs are very handy), relational, kv, graph, filesystem .. so that part is totally irrelevant.

Assuming "big data" in this context is still relational data, then any of those systems would suffice, within their own particular tradeoffs and features.

[arnon → misterman0]

There is no direct relation between the query language and the underlying infrastructure.

If you're talking about taking some questions and getting graphs from them, ThoughtSpot does a good job.