Apache Cassandra is an open source NoSQL distributed database trusted by thousands of companies for scalability and high availability without compromising performance.

This is the official documentation for Apache Cassandra. If you would like to contribute to this documentation, you are welcome to do so by submitting your contribution like any other patch …

Since it is a distributed database, Cassandra can (and usually does) have multiple nodes. A node represents a single instance of Cassandra. These nodes communicate with one another …

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. Browse through the …

Oct 29, 2025 · You can start Cassandra with sudo service cassandra start and stop it with sudo service cassandra stop. However, normally the service will start automatically. For this reason …

Cassandra was initially designed at Facebook using a staged event-driven architecture (SEDA). This initial design implemented a combination of Amazon’s Dynamo distributed storage and …

Cassandra 5.0 introduces vector search, which leverages storage-attached indexing and dense indexing techniques to transform data exploration and analysis. This update is especially …

Apache Cassandra powers mission-critical deployments with improved performance and unparalleled levels of scale in the cloud.

It is shipped with every Cassandra package, and can be found in the bin directory alongside the cassandra executable. It connects to the single node specified on the command line.

Read through the Cassandra Basics to learn main concepts and how Cassandra works at a high level. Browse through the Case Studies to learn how other users in our worldwide community …