Combining Druid and Spark

This article is pretty interesting on combining the technologies for OLAP query acceleration:
https://www.linkedin.com/pulse/combining-druid-spark-interactive-flexible-analytics-scale-butani

The work is open source here:

Pretty interesting !!

Today only I was discussing that there are solution for Realtime-analytics like Spark-streaming, Storm,

but the Druid brings this Realtime-indexing, which none of the other solutions.

Regards,

Manish