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 …

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 …

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 · The default location of log and data directories is /var/log/cassandra/ and /var/lib/cassandra. Start-up options (heap size, etc) can be configured in /etc/default/cassandra.

Overview Apache Cassandra is an open-source, distributed NoSQL database. It implements a partitioned wide-column storage model with eventually consistent semantics. Cassandra was …

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 …

Additional information This section covers how to get started using Apache Cassandra and should be the first thing to read if you are new to Cassandra.

Cassandra’s default configuration file, cassandra.yaml, is sufficient to explore a simple single-node cluster. However, anything beyond running a single-node cluster locally requires …

Cassandra 5.0 includes Trie-based Memtables and SSTables, optimizing memory and storage usage, and ultimately improving the performance of your database. Watch this video about …