# s3ql/s3ql

a full featured file system for online data storage

Repository: https://github.com/s3ql/s3ql
Canonical: https://ross.abutalabs.com/products/s3ql
Language: Python
License: NOASSERTION
License Family: other
Last push: 2026-08-21T19:27:36+00:00

## Health v2 (maintenance only)
Score: 93/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 82, longevity 100
- inputs: {"age_days": 4070, "days_push": 12, "days_rel": 41, "gap_med": 55, "n_releases_24m": 10}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1269, forks 114 (observed 2026-08-28T04:04:11.694439+00:00)

## What it is
S3QL is a FUSE-based UNIX file system that stores all its data in cloud object storage services like Amazon S3, Google Storage, or OpenStack, presenting a dynamically sized virtual drive. It adds compression, AES encryption, de-duplication, immutable trees, and copy-on-write snapshots, making it well suited for online backup and archival.

## Use cases
- mount cloud object storage as a local file system
- encrypted backups to Amazon S3
- store data online with de-duplication and compression
- create space-efficient snapshots of directory trees
- archive data with immutable backup trees
- access the same data from multiple computers over the internet

## When to choose
- you need a POSIX-like file system backed by S3-compatible object storage
- you want client-side encryption, compression, and de-duplication for cloud backups
- you need snapshots or immutable trees for archival integrity

## When to avoid
- you need maximum performance or low-latency file access
- you need a network file system shared concurrently by multiple machines
- you only need simple object upload/download without a file system interface

## Facets
- artifact type: application
- maturity: active
- function: file-system, cryptography, compression, backup, object-storage
- domain: cloud-computing, files, self-hosted, developer-tools
- platform: python, cli
- tags: fuse, s3, cloud-storage, deduplication, snapshots, online-backup, linux

## Member repositories
- s3ql/s3ql (main) score 93

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:11.694439+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 2026-08-30T05:03:33.646980+00:00, confidence not recorded.
  - readme: https://github.com/s3ql/s3ql (fetched 2026-08-28T04:04:11.694439+00:00, sha f9c4d3b7ee23)
- Data as of 2026-08-30T08:39:29.467469+00:00.