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 through a …

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.

As applications began to require full global replication and always available low-latency reads and writes, a new kind of database model was required to meet these new requirements. Relational …

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.

DataStax Astra: Cloud-native, serverless database as-a-service built on Apache Cassandra™, complete with a free-tier and CQL, REST, schemaless JSON Document and GraphQL APIs in addition to …

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 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 Trie Memtables.

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