# openzfs/zfs

OpenZFS on Linux and FreeBSD

Repository: https://github.com/openzfs/zfs
Canonical: https://ross.abutalabs.com/products/zfs
Homepage: https://openzfs.github.io/openzfs-docs
Language: C
License: NOASSERTION
License Family: other
Topics: openzfs, system-software, file-system
Last push: 2026-08-26T21:53:59+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 98, longevity 100
- inputs: {"age_days": 6106, "days_push": 7, "days_rel": 12, "gap_med": 30, "n_releases_24m": 22}
- 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 12418, forks 2023 (observed 2026-08-28T04:10:52.664670+00:00)

## What it is
OpenZFS is an advanced copy-on-write file system and volume manager originally developed for Solaris, now maintained by the OpenZFS community. This repository contains the kernel module and userland tools for running OpenZFS on Linux and FreeBSD.

## Use cases
- set up a ZFS storage pool with snapshots and checksums on Linux
- run a file system with data integrity verification and self-healing on FreeBSD
- create compressed and encrypted datasets for a NAS
- take incremental snapshots and send/replicate datasets between hosts
- manage RAID-Z arrays with a combined file system and volume manager
- tune ZFS performance for databases or virtualization workloads

## When to choose
- you need data integrity, checksumming, and self-healing storage on Linux or FreeBSD
- you want snapshots, clones, and send/receive for backups or replication
- you need flexible pooling (RAID-Z, mirrors) with compression and encryption built in
- you run a NAS, home server, or storage appliance and want a proven file system

## When to avoid
- you only need a simple file system on a single disk without pooling features
- you need a file system natively supported out of the box on macOS or Windows
- you cannot load kernel modules or build out-of-tree kernel code
- your distribution or kernel version is not among the supported releases

## Facets
- artifact type: library
- maturity: stable
- function: file-system, compression, backup, cryptography
- domain: operating-systems, developer-tools, self-hosted
- platform: bsd, c
- tags: zfs, volume-manager, storage, kernel-module, filesystem, cddl, linux

## Member repositories
- openzfs/zfs (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:52.664670+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 2026-08-29T17:14:05.367629+00:00, confidence not recorded.
  - readme: https://github.com/openzfs/zfs (fetched 2026-08-28T04:10:52.664670+00:00, sha 98cd1695339b)
  - homepage: https://openzfs.github.io/openzfs-docs (fetched 2026-08-29T08:10:56.382170+00:00, sha 19718a4f30c8)
- Data as of 2026-08-30T08:39:29.467469+00:00.