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. These nodes communicate with one another …

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 …

Oct 29, 2025 · Unmaintained older versions of Cassandra are archived here. CVE fixes may be applied to unmaintained versions as decided on a case-by-case basis. The PGP keys used to …

Install the RPM build on CentOS and RHEL-based distributions if you want to install Cassandra using YUM. Install the Debian build on Ubuntu and other Debian-based distributions if you …

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.

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.

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 …

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 …