# apache/cassandra

Open source transactional distributed database. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure without compromising performance.

Repository: https://github.com/apache/cassandra
Canonical: https://ross.abutalabs.com/products/cassandra
Homepage: https://cassandra.apache.org/
Language: Java
License: Apache-2.0
License Family: permissive
Topics: cassandra, java, database
Last push: 2026-08-26T23:35:30+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 6314, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_readme
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 10082, forks 4104 (observed 2026-08-28T04:10:39.498757+00:00)

## What it is
Apache Cassandra is an open-source NoSQL distributed wide-column database written in Java, designed for linear scalability and fault tolerance across commodity hardware or cloud infrastructure. Its masterless, multi-datacenter replication architecture delivers high availability and low latency for mission-critical workloads, surviving regional outages without data loss.

## Use cases
- store massive amounts of data with linear scalability
- run a highly available database that survives datacenter outages
- replicate data across multiple datacenters with low latency
- handle high-write-throughput workloads on commodity hardware
- deploy a fault-tolerant NoSQL database in the cloud or on-premises
- query large datasets with a SQL-like language (CQL)

## When to choose
- you need massive write throughput and horizontal scalability
- high availability and multi-datacenter replication are requirements
- your data model fits a JOINless, key-oriented schema
- you want a proven, battle-tested open-source database with no single point of failure

## When to avoid
- you need complex multi-table joins or relational constraints
- your dataset is small enough for a single-node relational database
- you require strong consistency across all writes by default
- you need ad-hoc analytical queries over frequently changing schemas

## Facets
- artifact type: application
- maturity: stable
- function: database, caching, monitoring, security
- domain: databases, microservices, big-data, backend, cloud-computing
- platform: jvm, cloud, self-hosted, cross-platform
- tags: nosql, wide-column-store, masterless-replication, cql, high-availability, multi-datacenter, distributed-database, linux, docker

## Member repositories
- apache/cassandra (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:39.498757+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:19:45.256839+00:00, confidence not recorded.
  - homepage: https://cassandra.apache.org/ (fetched 2026-08-29T08:19:29.904785+00:00, sha aa77c21c3a9b)
  - site_page: https://cassandra.apache.org/_/quickstart.html (fetched 2026-08-29T08:19:29.913959+00:00, sha d5e6513c15fe)
- Data as of 2026-08-30T08:39:29.467469+00:00.