Apache Cassandra is an open source NoSQL distributed database trusted by thousands of companies for scalability and high availability without compromising performance. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure make it the perfect platform for mission-critical data.

Cassandra is a NoSQL distributed database. By design, NoSQL databases are lightweight, open-source, non-relational, and largely distributed. Counted among their strengths are horizontal scalability, distributed architectures, and a flexible approach to schema definition.

Get started with Cassandra, fast. Quickstart Guide Apache Cassandra powers mission-critical deployments with improved performance and unparalleled levels of scale in the cloud.

Feb 3, 2025 · Add the Apache repository of Cassandra to /etc/apt/sources.list.d/cassandra.sources.list, for example for the latest 4.1 echo "deb [signed-by=/etc/apt/keyrings/apache-cassandra.asc] https://debian.cassandra.apache.org 41x main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list

This section covers how to get started using Apache Cassandra and should be the first thing to read if you are new to Cassandra. Installing Cassandra : Installation instructions plus information on choosing a method.

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 Case Studies to learn how other users in our worldwide community are getting value out of Cassandra.

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 want to install Cassandra using APT.

Find Cassandra tutorials, how-tos and other technical content by searching with keywords, as well as skill level (beginner, intermediate, advanced). If you have content to add, submit a pull request here.

cqlsh is a command-line shell for interacting with Cassandra using CQL. 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. For example:

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 impactful for domains like machine learning and artificial intelligence (AI).