# apache/accumulo

Apache Accumulo

Repository: https://github.com/apache/accumulo
Canonical: https://ross.abutalabs.com/products/accumulo
Homepage: https://accumulo.apache.org
Language: Java
License: Apache-2.0
License Family: permissive
Topics: accumulo, big-data, hacktoberfest
Last push: 2026-09-02T20:00:26+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 100, release rhythm 35, longevity 100
- inputs: {"age_days": 5445, "days_push": 0, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1167, forks 487 (observed 2026-09-03T02:15:09.120990+00:00)

## What it is
Apache Accumulo is a sorted, distributed key/value store built on Apache Hadoop's HDFS and Apache ZooKeeper for scalable storage and retrieval of large datasets across a cluster. It offers server-side programming via Iterators and cell-based access control where every key/value pair carries its own security label.

## Use cases
- store and query billions of key/value pairs across a cluster
- run a NoSQL database on top of Hadoop HDFS
- enforce cell-level security labels on big data
- build a scalable data store for analytics workloads
- run server-side custom processing with iterators
- replace HBase with a mature Apache distributed table store

## When to choose
- you need horizontally scalable sorted key/value storage integrated with the Hadoop ecosystem
- you require fine-grained cell-level access control and security labels
- you want server-side programmability (Iterators) for filtering and computation
- you need a battle-tested, stable Apache project with long-term releases

## When to avoid
- you need a simple embedded or single-node database
- you want SQL or rich relational queries
- you cannot operate HDFS and ZooKeeper dependencies
- your dataset is small enough for PostgreSQL, MongoDB, or Redis

## Facets
- artifact type: service
- maturity: stable
- function: database, search-engine, authorization, caching
- domain: databases, big-data, microservices, security
- platform: jvm, cloud, self-hosted
- tags: key-value-store, hadoop, zookeeper, hdfs, sorted-store, cell-level-security, iterators, apache, data-engineering, linux, docker

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

## Provenance
- Observed fields: from GitHub, fetched 2026-09-03T02:15:09.120990+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 2026-08-30T06:31:33.143265+00:00, confidence not recorded.
  - readme: https://github.com/apache/accumulo (fetched 2026-09-03T02:15:09.120990+00:00, sha 69c2ac812669)
  - homepage: https://accumulo.apache.org (fetched 2026-08-29T12:35:49.123472+00:00, sha 593bd0bf194c)
  - site_page: https://accumulo.apache.org/docs/2.x (fetched 2026-08-29T12:35:49.132576+00:00, sha 2d6260c674b9)
  - site_page: https://accumulo.apache.org/docs/2.x/apidocs (fetched 2026-08-29T12:35:49.134461+00:00, sha 0b1665874d72)
  - site_page: https://accumulo.apache.org/quickstart-1.x (fetched 2026-08-29T12:35:49.136173+00:00, sha d5c2d4d8ba1c)
  - site_page: https://accumulo.apache.org/1.10/apidocs (fetched 2026-08-29T12:35:49.138177+00:00, sha 7321fd096882)
  - site_page: https://accumulo.apache.org/external-docs (fetched 2026-08-29T12:35:49.139969+00:00, sha 94d29aa18943)
  - site_page: https://accumulo.apache.org/docs-archive (fetched 2026-08-29T12:35:49.141701+00:00, sha d29cdf4e9b13)
  - site_page: https://accumulo.apache.org/docs/2.x/development/iterators (fetched 2026-08-29T12:35:49.143370+00:00, sha 0fb222a5ed84)
  - site_page: https://accumulo.apache.org/docs/2.x/security/authorizations (fetched 2026-08-29T12:35:49.146055+00:00, sha e4f9f0c8ab17)
- Data as of 2026-08-30T08:39:29.467469+00:00.