# leo-project/leofs

The LeoFS Storage System

Repository: https://github.com/leo-project/leofs
Canonical: https://ross.abutalabs.com/products/leofs
Homepage: https://github.com/leo-project/leofs
Language: Erlang
License: Apache-2.0
License Family: permissive
Topics: leofs, erlang, distributed-storage, distributed-file-system, s3-storage, s3, nfs-server, nfs, datalake
Last push: 2026-01-05T14:46:37+00:00

## Health v2 (maintenance only)
Score: 50/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 60, release rhythm 8, longevity 100
- inputs: {"age_days": 5201, "days_push": 240, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1594, forks 156 (observed 2026-08-28T04:05:09.008702+00:00)

## What it is
LeoFS is a highly available, distributed, eventually consistent object/blob storage system built in Erlang. It provides S3-compatible and REST APIs plus beta NFS support, with multi-data-center replication for building large-scale, fault-tolerant storage clusters.

## Use cases
- self-host an S3-compatible object store to cut public cloud costs
- store huge volumes of photos, videos, and log data in a data lake
- build a multi-data-center replicated storage cluster without a single point of failure
- expose distributed storage over NFS to legacy applications
- serve large objects via REST API with built-in caching

## When to choose
- you need an S3-compatible storage cluster you fully control on your own hardware
- you require multi-data-center replication and eventual consistency at large scale
- you want a proven Erlang-based storage system with gateway, storage, and manager components

## When to avoid
- you need a small, simple S3 store for a single server (MinIO is simpler)
- you need strongly consistent storage or POSIX-compliant NFS (NFS support is beta)
- you want a project with frequent active development and a large community

## Facets
- artifact type: service
- maturity: maintenance
- function: object-storage, file-system, self-hosted, http-server
- domain: microservices, cloud-computing, big-data
- platform: self-hosted, cloud
- tags: s3-compatible, distributed-storage, data-lake, nfs, erlang, eventual-consistency, multi-data-center, replication, storage, infrastructure, linux, docker

## Member repositories
- leo-project/leofs (main) score 50

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:09.008702+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 2026-08-30T03:54:12.817883+00:00, confidence not recorded.
  - readme: https://github.com/leo-project/leofs (fetched 2026-08-28T04:05:09.008702+00:00, sha 7fd74bb53d58)
  - homepage: https://github.com/leo-project/leofs (fetched 2026-08-29T11:24:57.875296+00:00, sha 9723fd16c0c1)
- Data as of 2026-08-30T08:39:29.467469+00:00.