03006174b7
This change adds the 'defaultuserquota' and 'defaultgroupquota'
properties to ZFS datasets to apply a quota to users and groups that do
not have a specific quota assigned. The default quota checking
mechanism works alongside the existing 'userquota' and 'groupquota'
checks, only taking effect if no quota is assigned for a particular
user/group. This means that it's possible to exceed a default quota
by quite a lot before the user/groupused property is updated and
further writes are denied, which was already the case for
user/groupquota.
Default quotas are implemented similarly to 'normal' user quotas,
but instead of being user properties that are preserved across
snapshots, they default back to none. NB: this is different from the
observed Solaris behavior, which is to preserve default quotas across
snapshot/clone/promote.
For instance, Solaris has:
# zfs set defaultuserquota=100M tank/fs
# zfs snap tank/fs@snap
# zfs clone tank/fs@snap tank/fs-clone
# zfs get -H defaultuserquota tank/fs-clone
tank/fs-clone defaultuserquota 100M -
Whereas this commit does:
# zfs set defaultuserquota=100M tank/fs
# zfs snap tank/fs@snap
# zfs clone tank/fs@snap tank/fs-clone
# zfs get -H defaultuserquota tank/fs-clone
tank/fs-clone defaultuserquota none default
It should also be possible to implement a default project quota using
an analogous process, if doing so makes sense.
Signed-off-by: Todd Seidelmann <seidelma@wharton.upenn.edu>
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README.md
OpenZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community. This repository contains the code for running OpenZFS on Linux and FreeBSD.
Official Resources
- Documentation - for using and developing this repo
- ZoL Site - Linux release info & links
- Mailing lists
- OpenZFS site - for conference videos and info on other platforms (illumos, OSX, Windows, etc)
Installation
Full documentation for installing OpenZFS on your favorite operating system can be found at the Getting Started Page.
Contribute & Develop
We have a separate document with contribution guidelines.
We have a Code of Conduct.
Release
OpenZFS is released under a CDDL license.
For more details see the NOTICE, LICENSE and COPYRIGHT files; UCRL-CODE-235197
Supported Kernels
- The
METAfile contains the officially recognized supported Linux kernel versions. - Supported FreeBSD versions are any supported branches and releases starting from 12.4-RELEASE.