Apache Druid
High performance, real-time analytics database for sub-second queries at scale and under load.
Apache Druid is a high performance real-time analytics database. Druid's main value add is to reduce time to insight and action. Apache Druid is designed for workflows where fast queries and ingest really matter. Druid excels at powering UIs, running operational (ad-hoc) queries, or handling high concurrency. Consider Druid as an open source alternative to data warehouses for a variety of use cases.
Java