zfs quota question

[Jeremy Chadwick]

On Tue, Oct 07, 2008 at 05:32:43PM +0800, lhmwzy wrote:
> I create a zfs volume pool/lhm and give it quota 1M use "zfs set
> quota=1m pool/lhm"
> 
> #zfs get all pool/lhm
> zfs get all pool/lhm
> [ttyp0][5:22:12pm]
> NAME      PROPERTY       VALUE                  SOURCE
> pool/lhm  type           filesystem             -
> pool/lhm  creation       Tue Oct  7 17:14 2008  -
> pool/lhm  used           1.00M                  -
> pool/lhm  available      0                      -
> pool/lhm  referenced     1.00M                  -
> pool/lhm  compressratio  7.25x                  -
> pool/lhm  mounted        yes                    -
> pool/lhm  quota          1M                     local
> pool/lhm  reservation    none                   default
> pool/lhm  recordsize     128K                   default
> 
> But I cp 10 files,per file size is 2.4M to pool/lhm
> #ll -h /pool/lhm
> total 1013
> -rw-------  1 root  wheel   2.4M Oct  7 17:18 d
> -rw-------  1 root  wheel   2.4M Oct  7 17:19 dd
> -rw-------  1 root  wheel   2.4M Oct  7 17:19 ddd
> -rw-------  1 root  wheel   2.4M Oct  7 17:19 dddd
> -rw-------  1 root  wheel   2.4M Oct  7 17:19 ddddd
> -rw-------  1 root  wheel   2.4M Oct  7 17:19 dddddd
> -rw-------  1 root  wheel   2.4M Oct  7 17:19 dddddd2
> -rw-------  1 root  wheel   2.4M Oct  7 17:19 dddddd24
> -rw-------  1 root  wheel   2.1M Oct  7 17:19 dddddd247
> -rw-------  1 root  wheel   2.4M Oct  7 17:18 kldstat.core
> 
> #du -hs /pool/lhm
> 1.0M	.
> 
> I am puzzled,the what's zfs quota mean?
> I understand is file quota,that can't put files which total size larger than 1M.
> But it seems my understanding is wrong.
> Anybody give a idea?

I can confirm and reproduce what you're seeing.

Based on all of the ZFS documentation and examples I've read, it appears
to be a bug in FreeBSD ZFS.

CC'ing pjd@, who maintains ZFS on FreeBSD.

-- 
| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |