Cassandra Monique Batie

Apache cassandra is an open source nosql distributed database trusted by thousands of companies for scalability and high availability without compromising performance. Since it is a distributed database, cassandra can (and usually does) have multiple nodes. A node represents a single instance of cassandra.

This is the official documentation for apache cassandra. Apache cassandra powers mission-critical deployments with improved performance and unparalleled levels of scale in the cloud. Read through the cassandra basics to learn main concepts and how cassandra works at a high level.

To understand cassandra in more detail, head over to the docs. Oct 29, 2025you can start cassandra with sudo service cassandra start and stop it with sudo service cassandra stop. Cassandra 5.0 introduces vector search, which leverages storage-attached indexing and dense indexing techniques to transform data exploration and analysis.

Udfs are part of the cassandra schema, and are automatically propagated to all nodes in the cluster. Streaming in cassandra 4.0 is based on non-blocking input/output (nio) with netty (cassandra-12229).