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MongoDB (from "humongous") is a scalable, high-performance NoSQL database.
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ClickHouse is an open-source column-oriented database management system that allows generating analytical data reports in real time.
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Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
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The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance.