Comparison of ClickHouse, Druid and Pinot

Hi all ClickHouse, Druid and Pinot users and developers. I’ve published an extensive blog post comparing those systems: https://medium.com/@leventov/comparison-of-the-open-source-olap-systems-for-big-data-clickhouse-druid-and-pinot-8e042a5ed1c7.

Hope you will find it useful.