Date: Fri, 13 Apr 2012 16:11:01 +0300 From: Volodymyr Kostyrko <c.kworr@gmail.com> To: Mark Schouten <mark@tuxis.nl> Cc: "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Subject: Re: ZFS and disk usage Message-ID: <4F8825E5.3040809@gmail.com> In-Reply-To: <1334319673.4f881a39b32a8@www.hyperdesktop.nl> References: <1334319673.4f881a39b32a8@www.hyperdesktop.nl>
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Mark Schouten wrote:
> Hi,
>
> I'm having some issues with a FreeBSD box using ZFS to serve iscsi to other boxes.
>
> [root@storage ~]# zpool list
> NAME SIZE USED AVAIL CAP HEALTH ALTROOT
> storage 1.77T 431G 1.34T 23% ONLINE -
>
> As you can see, the zpool is at only 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 1.60T 138G 431G /storage
> storage/ZFS_FS_1 20G 158G 16K -
> storage/ZFS_FS_2 20G 158G 16K -
> storage/ZFS_FS_3 100G 238G 16K -
> storage/ZFS_FS_4 20G 158G 16K -
> storage/ZFS_FS_5 1G 139G 16K -
> storage/ZFS_FS_6 400G 538G 16K -
> storage/ZFS_FS_7 20G 158G 16K -
> storage/ZFS_FS_8 400G 538G 16K -
> storage/ZFS_FS_9 20G 158G 16K -
> storage/ZFS_FS_10 20G 158G 16K -
> storage/ZFS_FS_11 20G 158G 16K -
> storage/ZFS_FS_12 150G 288G 16K -
> storage/ZFS_FS_13 20G 158G 16K -
>
> These are fiesystems that are created with the following command.
> zfs create -V ${size}GB ${ZFS_ROOT}/${diskname}
`zfs create -V` withous `-s` creates reserved volume that eats all
needed space immediately. Technically zfs pool is filled only for 23%,
but logically you have only 138G left unassigned.
--
Sphinx of black quartz judge my vow.
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