What is Druid?
Druid is a distributed, column-oriented, real-time analytics data store that is commonly used to power exploratory dashboards in multi-tenant environments. Druid excels as a data warehousing solution for fast aggregate queries on petabyte sized data sets. Druid supports a variety of flexible filters, exact calculations, approximate algorithms, and other useful calculations.
Druid is a tool in the Big Data Tools category of a tech stack.
Why developers like Druid
Real Time Aggregations
Batch and Real-Time Ingestion
OLAP + OLTP
Combining stream and historical analytics