Comparison of the Open Source OLAP Systems for Big Data: ClickHouse, Druid, and PinotIn this post I want to compare ClickHouse, Druid, and Pinot, the three open source data stores that run analytical queries over big volumes of data with interactive latencies. Warning: this post is pretty big, you may want to read just the “Summary” section in the end. Sources of InformationI learned the implementation details of ClickHouse from Alexey Zatelepin, one of the core developers. The be
