Apache Druid
Analytical database software / From Wikipedia, the free encyclopedia
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Druid is a column-oriented, open-source, distributed data store written in Java. Druid is designed to quickly ingest massive quantities of event data, and provide low-latency queries on top of the data.[3] The name Druid comes from the shapeshifting Druid class in many role-playing games, to reflect that the architecture of the system can shift to solve different types of data problems.
Druid is commonly used in business intelligence-OLAP applications to analyze high volumes of real-time and historical data.[4] Druid is used in production by technology companies such as Alibaba,[4] Airbnb,[4] Cisco,[5][4] eBay,[6] Lyft,[7] Netflix,[8] PayPal,[4] Pinterest,[9] Reddit,[10] Twitter,[11] Walmart,[12] Wikimedia Foundation[13] and Yahoo.[14]