ZFS (and quota)
Pawel Jakub Dawidek
pjd at FreeBSD.org
Thu Sep 20 23:57:18 PDT 2007
On Thu, Sep 20, 2007 at 12:31:56AM +0200, Johan Ström wrote:
> Hello
>
> I just installed FreeBSD-current on a box (actually upgraded 6.2 to -
> current) to experiment a bit.
> I was playing around with ZFS a bit and tried out the quota features.
> While doing this I noticed that it doesnt seem like you get a "disk
> full" notice the same way as you do on a "normal" (UFS) filesystem.
> Instead of aborting the operation with "No space left on device" it
> just continued:
[...]
> [root at devbox /tank]# zfs create tank/set2
> [root at devbox /tank/set2]# zfs set quota=10M tank/set2
> [root at devbox /tank/set2]# zfs get quota tank/set2
> NAME PROPERTY VALUE SOURCE
> tank/set2 quota 10M local
> [root at devbox /tank/set2]# dd if=/dev/urandom of=test
> ^C
> 18563+0 records in
> 18562+0 records out
> 9503744 bytes transferred in 199.564353 secs (47622 bytes/sec)
> [root at devbox /tank/set2]# zfs list tank/set2
> NAME USED AVAIL REFER MOUNTPOINT
> tank/set2 9.15M 870K 9.15M /tank/set2
>
> No hard stop there, it just tries to write more and more and more..
> Well the quota is enforced fine but shouldnt there be some more hard
> error? I'm not sure how regular UFS quotas work though since I never
> used them, but this seems like strange behaviour.
Hmm, seems to work just fine here:
beast:root:~# zfs create tank/foo
beast:root:~# zfs set quota=10m tank/foo
beast:root:~# dd if=/dev/random of=/tank/foo/test bs=1m
dd: /tank/foo/test: Disc quota exceeded
11+0 records in
10+0 records out
10485760 bytes transferred in 6.109407 secs (1716330 bytes/sec)
beast:root:~# df -h /tank/foo
Filesystem Size Used Avail Capacity Mounted on
tank/foo 10M 10M 0B 100% /tank/foo
I think you just waited not long enough:) You didn't give block size
argument to dd(1), so it used 512 bytes. Please be more patient, retry
and report back, thanks!
--
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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