zfs quota question
Pawel Jakub Dawidek
pjd at FreeBSD.org
Tue Oct 7 10:33:10 UTC 2008
On Tue, Oct 07, 2008 at 03:30:09AM -0700, Jeremy Chadwick wrote:
> On Tue, Oct 07, 2008 at 12:17:55PM +0200, Pawel Jakub Dawidek wrote:
> > Turn compression off and retry.
> Yep, that's the key!
> # zfs set quota=4g storage/home
> # zfs set compression=off storage
> # zfs get compression,quota,mountpoint
> NAME PROPERTY VALUE SOURCE
> storage compression off local
> storage quota none default
> storage mountpoint /storage default
> storage/home compression off inherited from storage
> storage/home quota 4G local
> storage/home mountpoint /home local
> # dd if=/dev/zero of=/home/filler bs=1g count=8
> dd: /home/filler: Disc quota exceeded
> 4+0 records in
> 3+1 records out
> 3306553344 bytes transferred in 62.566567 secs (52848566 bytes/sec)
> # df -h /home
> Filesystem Size Used Avail Capacity Mounted on
> storage/home 4.0G 4.0G 0B 100% /home
> I had no idea compression could cause this. A useful feature, but
> obviously can result in misleading results... :-)
Yeah, ZFS offers a lot, which can create confusion, unfortunately. Do we
limit physical space with quota or only logical (before compression)?
Should we take space consumed by snapshots into account or not? etc.
Pawel Jakub Dawidek http://www.wheel.pl
pjd at FreeBSD.org http://www.FreeBSD.org
FreeBSD committer Am I Evil? Yes, I Am!
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