Hi!
I have a zpool called data, and I have some inconsistencies with sizes.
$ zpool iostat
capacity operations bandwidth
pool alloc free read write read write
---------- ----- ----- ----- ----- ----- -----
data 3.32T 761G 516 50 56.1M 1.13M
$ zfs list -t all
NAME USED AVAIL REFER MOUNTPOINT
data 2.21T 463G 9.06G /data
Can anyone throw any light on this?
Is not free the same as AVAIL?
I do not have any zfs snapshots, but some filesystems are compressed.
--
chs,
On Tue, Jan 17, 2012 at 4:47 PM, Christer Solskogen <christer.solskogen@gmail.com> wrote: <snip> Ups, I forgot to say that this is on FreeBSD 9.0-RELEASE and all filesystems are v28. -- chs,
The `zpool` command does not show all the overhead from ZFS. The `zfs` command does. That's why the `zfs` command shows less available space than the `zpool` command. Thanks, Shawn On Tue, Jan 17, 2012 at 8:47 AM, Christer Solskogen <christer.solskogen@gmail.com> wrote:> Hi! > > I have a zpool called data, and I have some inconsistencies with sizes. > > $ zpool iostat > ? ? ? ? ? ? ? capacity ? ? operations ? ?bandwidth > pool ? ? ? ?alloc ? free ? read ?write ? read ?write > ---------- ?----- ?----- ?----- ?----- ?----- ?----- > data ? ? ? ?3.32T ? 761G ? ?516 ? ? 50 ?56.1M ?1.13M > > $ zfs list -t all > NAME ? ? ? ? ? ? ? ? ? ? ? ? ? ?USED ?AVAIL ?REFER ?MOUNTPOINT > data ? ? ? ? ? ? ? ? ? ? ? ? ? 2.21T ? 463G ?9.06G ?/data > > Can anyone throw any light on this? > Is not free the same as AVAIL? > > I do not have any zfs snapshots, but some filesystems are compressed. > > -- > chs, > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"
Am 17.01.2012 16:47, schrieb Christer Solskogen:> Hi! > > I have a zpool called data, and I have some inconsistencies with sizes. > > $ zpool iostat > capacity operations bandwidth > pool alloc free read write read write > ---------- ----- ----- ----- ----- ----- ----- > data 3.32T 761G 516 50 56.1M 1.13M > > $ zfs list -t all > NAME USED AVAIL REFER MOUNTPOINT > data 2.21T 463G 9.06G /data > > Can anyone throw any light on this?The ZFS numbers are 2/3 of the ZPOOL numbers for alloc. This looks like a raidz1 over 3 drives. The ZPOOL command shows disk blocks available and used (disk drive view), the ZFS command operates on the file-system level and shows blocks used to hold actual data or available for actual data (does not account for RAID parity overhead).> Is not free the same as AVAIL?Avail should be 2/3 of free, but I guess there is some overhead that reduces the number of available blocks.> I do not have any zfs snapshots, but some filesystems are compressed.Compression affects the ZPOOL and ZFS numbers in the same way, but "zfs list" and "df" will differ significantly for file-systems that contain compressible data. Regards, STefan