Date: Fri, 13 Apr 2012 14:21:13 +0200 From: Mark Schouten <mark@tuxis.nl> To: "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Subject: ZFS and disk usage Message-ID: <1334319673.4f881a39b32a8@www.hyperdesktop.nl>
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Hi,
I'm having some issues with a FreeBSD box using ZFS to se=
rve iscsi to other boxes.
[root@storage ~]# zpool list
N=
AME SIZE USED AVAIL CAP HEALTH ALTROOT
storage 1.77T =
431G 1.34T 23% ONLINE -
As you can see, the zpool is at o=
nly 23% of it's capacity. However, if you get a list of filesystems with=
"zfs list", you see that there is only 138GB free space left.
[root=
@storage ~]# zfs list
NAME USED =
AVAIL REFER MOUNTPOINT
storage 1.60=
T 138G 431G /storage
storage/ZFS_FS_1 2=
0G 158G 16K -
storage/ZFS_FS_2 20G 15=
8G 16K -=20
storage/ZFS_FS_3 100G 238G =
16K -=20
storage/ZFS_FS_4 20G 158G 16K =
-=20
storage/ZFS_FS_5 1G 139G 16K -=
=20
storage/ZFS_FS_6 400G 538G 16K - =
storage/ZFS_FS_7 20G 158G 16K -=20
s=
torage/ZFS_FS_8 400G 538G 16K -=20
storag=
e/ZFS_FS_9 20G 158G 16K -=20
storage/ZFS=
_FS_10 20G 158G 16K -=20
storage/ZFS_FS_11=
20G 158G 16K -=20
storage/ZFS_FS_12 =
150G 288G 16K -=20
storage/ZFS_FS_13 =
20G 158G 16K -=20
These are fiesystems that=
are created with the following command.
zfs create -V ${size}GB ${Z=
FS_ROOT}/${diskname}
Now, it seems that zpool only counts the d=
ata that is actually written on the disk, and that zfs counts both the s=
um of the individual filesystems *and* the data actually written on disk=
. If I was to create a new filesystem of 138GB, the filesystem would be =
full, eventhough that that's not the case.
This seems weird, but=
I'm not sure if it's me doing something wrong, or if its a bug. Please =
enlighten me, thanks.
Some more info:
[root@sto=
rage ~]# uname -a
FreeBSD storage.storage 8.2-RELEASE FreeBSD 8.2-RE=
LEASE #0: Thu Feb 17 02:41:51 UTC 2011 root@mason.cse.buffalo.edu:/u=
sr/obj/usr/src/sys/GENERIC amd64
[root@storage ~]# zpool get a=
ll storage
NAME PROPERTY VALUE SOURCE
storage s=
ize 1.77T -
storage used 431G -=
storage available 1.34T -
storage capacity 2=
3% -
storage altroot - default
storage=
health ONLINE -
storage guid 1090519474454=
5589060 default
storage version 15 default
sto=
rage bootfs - default
storage delegation on =
default
storage autoreplace off default
sto=
rage cachefile - default
storage failmode wai=
t default
storage listsnapshots off default=
[root@storage ~]# zfs get all storage
NAME PROPERTY=
VALUE SOURCE
storage type =
filesystem -
storage creation Tue Ma=
y 10 11:59 2011 -
storage used 1.60T =
-
storage available 138G -
s=
torage referenced 431G -
storage comp=
ressratio 1.00x -
storage mounted =
yes -
storage quota none =
default
storage reservation none =
default
storage recordsize 128K =
default
storage mountpoint /storage d=
efault
storage sharenfs off default=
storage checksum on default
s=
torage compression off default
storage=
atime on default
storage devi=
ces on default
storage exec =
on default
storage setuid =
on default
storage readonly =
off default
storage jailed off =
default
storage snapdir hidden =
default
storage aclmode groupmask =
default
storage aclinherit restricted d=
efault
storage canmount on default=
storage shareiscsi off default
s=
torage xattr off temporary
stora=
ge copies 1 default
storage ve=
rsion 4 -
storage utf8only =
off -
storage normalization none=
-
storage casesensitivity sensitive =
-
storage vscan off defau=
lt
storage nbmand off default=
storage sharesmb off default
s=
torage refquota none default
storage=
refreservation none default
storage prim=
arycache all default
storage secondaryc=
ache all default
storage usedbysnapshots =
0 -
storage usedbydataset 431G =
-
storage usedbychildren 1.18T =
-
storage usedbyrefreservation 0 =
-
--=20
Dit bericht is verzonden via https://www.hyperdes=
ktop.nl/. Alles, overal!
Mark Schouten | Tuxis Internet Engine=
ering
KvK: 09218193 | http://www.tuxis.nl/
T: 0318 200208 | info=
@tuxis.nl
M: 06 53463918 | mark@tuxis.nl
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