userquota@user=size | none
Limits the amount of space consumed by the specified user. Similar
to the refquota property, the userquota space calculation does not
include space that is used by descendent datasets, such as snapshots
and clones. User space consumption is identified by the
userspace@user property.
Enforcement of user quotas may be delayed by several seconds. This
delay means that a user might exceed their quota before the system
notices that they are over quota and begins to refuse additional
writes with the EDQUOT error message. See the userspace subcommand
for more information.
Unprivileged users can only access their own groups' space usage. The
root user, or a user who has been granted the userquota privilege
with "zfs allow", can get and set everyone's quota.
This property is not available on volumes, on file systems before
version 4, or on pools before version 15. The userquota@... proper-
ties are not displayed by "zfs get all". The user's name must be
appended after the @ symbol, using one of the following forms:
+o POSIX name (for example, joe)
+o POSIX numeric ID (for example, 1001)