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I have several samba shares, one of which is used for storing some backups.

I want to set a disk space quota on said share, as the ZFS volume the share resides on is huge and multi-purpose... I don't want the backups taking up more than 20Tb.

Can anyone point me in the right direction on how I can achieve this?

Thanks in advance!

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To set the quota for a filesystem:

zfs set quota=20TB poolname/backup-filesystem

To query the current quota setting:

zfs get quota poolname/backup-filesystem

Note that quotas can only be set on ZFS filesystems (i.e. made with zfs create pool/fsname), not on subdirectories (made with mkdir).

subdirectories of a ZFS filesystem are included within that filesystem's quota usage. Child filesystems inherit their parent's quota (if any) unless overridden with their own zfs set quota=size pool/parent/child command (but this is an additional restriction - child filesystems, like snapshots, are included in the parent's total quota usage).

  • Thank you cas - not only did you give me the exact answer I needed, you steered me away from the next pitfall. big thanks! – John Apr 11 '16 at 13:08

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