#zfs #freebsd #os #zol #open3


libzetta is a stable interface for programmatic administration of ZFS

9 releases

0.3.1 Apr 17, 2022
0.3.0 Apr 16, 2022
0.2.3 Oct 25, 2021
0.2.2 Apr 26, 2020
0.1.2 Aug 12, 2019

#69 in Operating systems

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Build Status codecov Crates.io Cirrus CI - Base Branch Build Status docs.rs license

libzetta-rs is a stable interface for programmatic administration of ZFS


Not yet. It won't break your pool or kill your brother, but API might change. Wait until 1.0.0. I have a pretty decent roadmap to 1.0.0.


Public API for zpool stable. Public API for zfs might change after I actually get to use it in other projects. Consult the documention on usage.


This library focused on FreeBSD support. This should work on any FreeBSD version since 9.2. No intention on supporting legacy versions. Supported versions:

  • 12.1


Right now it verified works with 0.7.13 and entire 0.7.x branch.

How it works

ZFS doesn't have stable API at all.libzfs_core(lzc) fills some gaps, but not entirely. While lzc provides stable APi to some features of zfs, there is no such thing for zpool. This library resorts to zfs(8) and zpool(8) where lzc falls shorts.

Running tests

Note that integration tests do a lot of zpool and zfs operations on live system. I recommend spin up a VM and use run_tests.sh to run integration tests inside. Tests also take a lot of disk space because each vdev is at least 64mb file.

Current feature status


Create Destroy Get Properties Set Properties Scrub Export Import List Available Read Status Add vdev Replace Disk
open3 ✔¹
  1. Reads the status, but api isn't stable and does poor job at reporting scrubbing status.


Filesystem and ZVOL

Create Destroy List Get Properties Update Properties
lzc ✔¹
  1. Might not have all properties available.

Snapshot and bookmark

Create Destroy List Get Properties Send Recv
lzc ✔¹
  1. Might not have all properties available.



Unlike them LibZetta doesn't link against private libraries of ZFS. libzetta also has more documention.


LibZetta has zpool APIs. LibZetta shares -sys crates with this library. LibZetta also will delegate certain features of zfs(8) to open3 implementation.




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