# scylladb/scylladb

NoSQL data store using the Seastar framework, compatible with Apache Cassandra and Amazon DynamoDB

Repository: https://github.com/scylladb/scylladb
Canonical: https://ross.abutalabs.com/products/scylladb
Homepage: http://scylladb.com
Language: C++
License: NOASSERTION
License Family: other
Topics: nosql, c-plus-plus, scylla, seastar, cassandra, database, cpp
Last push: 2026-08-26T17:41:52+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 4270, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 15723, forks 1512 (observed 2026-08-28T04:11:13.940236+00:00)

## What it is
ScyllaDB is an open-source, high-performance NoSQL wide-column data store built in C++ on the shared-nothing Seastar framework. It is API-compatible with Apache Cassandra (CQL) and Amazon DynamoDB (via Alternator), delivering predictable low latency and high throughput on commodity hardware.

## Use cases
- run a Cassandra-compatible NoSQL database with better performance
- self-host a DynamoDB-compatible database outside AWS
- store time-series or IoT telemetry at millions of ops per second
- migrate off Apache Cassandra to reduce hardware costs
- power real-time AI and recommendation workloads with low-latency lookups
- scale a wide-column datastore to billions of rows across a cluster
- run a vector search database for AI applications

## When to choose
- you need Cassandra or DynamoDB API compatibility with lower latency and fewer nodes
- you have data-intensive workloads requiring predictable single-digit millisecond latencies
- you want a self-hosted or cloud-managed horizontally scalable NoSQL store
- you need high throughput on commodity or cloud hardware

## When to avoid
- you need relational features like joins, foreign keys, or ACID transactions across entities
- your dataset is small enough for a single-node relational or document database
- you cannot operate a distributed database cluster or meet its Linux/hardware tuning requirements
- you need strong ad-hoc query flexibility rather than key-based access patterns

## Facets
- artifact type: service
- maturity: stable
- function: database, caching, vector-database
- domain: databases, big-data, backend
- platform: cloud, self-hosted, cpp
- tags: nosql, cassandra-compatible, dynamodb-compatible, seastar, wide-column-store, distributed-database, low-latency, real-time, linux, docker, kubernetes

## Member repositories
- scylladb/scylladb (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:13.940236+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 2026-08-29T17:05:33.631185+00:00, confidence not recorded.
  - readme: https://github.com/scylladb/scylladb (fetched 2026-08-28T04:11:13.940236+00:00, sha e0d64ec0dbb7)
  - homepage: http://scylladb.com (fetched 2026-08-29T08:03:42.301418+00:00, sha 02481b88ac91)
  - site_page: https://docs.scylladb.com (fetched 2026-08-29T08:03:42.306338+00:00, sha 44136fa355b3)
  - site_page: https://docs.scylladb.com/manual/stable/getting-started/install-scylla/index.html (fetched 2026-08-29T08:03:42.311187+00:00, sha f0ad66ce6a4a)
  - site_page: https://docs.scylladb.com/ (fetched 2026-08-29T08:03:42.313237+00:00, sha 44136fa355b3)
  - site_page: https://www.scylladb.com/product/scylla-enterprise (fetched 2026-08-29T08:03:42.304245+00:00, sha 554da67739df)
  - site_page: https://www.scylladb.com/pricing (fetched 2026-08-29T08:03:42.308151+00:00, sha 3d0d577343d4)
  - site_page: https://www.scylladb.com/company (fetched 2026-08-29T08:03:42.314822+00:00, sha 66b51371580d)
- Data as of 2026-08-30T08:39:29.467469+00:00.