On 18/02/2026 14:31, Carsten Grzemba via illumos-discuss wrote:
Because I havn't found an chproj command in Illumos or Solaris. Are there still use cases for project Id's in files or filesystems? Which filesystems support project Id's? Where project Id of a file/ filesystem is stored. Or is this feature only available in filesystems which support extended attributes?Can anyone help with information here?
I see a feature@project_quota in newer zpools:
project_quota
GUID org.zfsonlinux:project_quota
DEPENDENCIES extensible_dataset
READ-ONLY COMPATIBLE yes
This feature allows administrators to account the spaces and
objects usage information against the project identifier (ID).
The project ID is an object-based attribute. When upgrading an
existing filesystem, objects without a project ID will be
assigned a zero project ID. When this feature is enabled, newly
created objects inherit their parent directories' project ID if
the parent's inherit flag is set (via chattr [+-]P or zfs project
-s|-C). Otherwise, the new object's project ID will be zero. An
object's project ID can be changed at any time by the owner (or
privileged user) via chattr -p prjid or zfs project -p prjid.
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