Hi Harry,
Both du and df are pre-ZFS commands and don't really understand ZFS
space issues, which are described in the ZFS FAQ here:
http://hub.opensolaris.org/bin/view/Community+Group+zfs/faq
Why does du(1) report different file sizes for ZFS and UFS? Why doesn't
the space consumption that is reported by the df command and the zfs
list command match?
Will's advice is good:
Use zpool list and zfs list to determine how much space is available for
your ZFS file systems and use du or ls -l to review file sizes. Don't
use du or df to look at ZFS file systems sizes.
Thanks,
Cindy
On 04/19/10 16:18, Harry Putnam wrote:
Will Murnane <will.murn...@gmail.com> writes:
It's important to consider what you want this data for. Considering
upgrading your storage to get more room? Check out "zpool list".
Need to know whether accounting or engineering is using more space?
Look at "zfs list". Looking at a sparse or compressed file, and want
to know how many bytes are allocated to it? "du" does the trick.
Planning to email someone a file, and want to know if it'll fit in
their 10MB quota? "ls -l" is the relevant command.
In short, there are many commands because there are many answers, and
many questions. No single tool has all the information available to
it.
I'm still confused, sorry I thought I got it for a minute there.
I'm seeing a really big (to big to be excused lightly) difference with
the 2 zfs native methods zpool and rpool
compared to 2 native unix methods, du and /bin/df
I'm seeing 100s of GB in use, that /bin/df... doesn't know about, and
du cannot find.
Something isn't adding up here:
zpool list
NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT
rpool 466G 50.7G 415G 10% 1.00x ONLINE -
z2 464G 366G 97.9G 78% 1.00x ONLINE -
z3 696G 124G 572G 17% 1.00x ONLINE -
You see z2 shows 366G allocated and 97.9 free
zfs list -r z2
NAME USED AVAIL REFER MOUNTPOINT
z2 366G 90.7G 19K /z2
z2/pub 4.98G 90.7G 4.97G /pub
z2/rhosts 326G 90.7G 22K /rhosts
z2/rhosts/imgs 299G 90.7G 23K /rhosts/imgs
z2/rhosts/imgs/bjp 83.6G 90.7G 28.4G /rhosts/imgs/bjp
z2/rhosts/imgs/harvey 150G 90.7G 17.6G /rhosts/imgs/harvey
z2/rhosts/imgs/harvey/ImagesMusic 132G 90.7G 28.3G
/rhosts/imgs/harvey/ImagesMusic
z2/rhosts/imgs/mob1 65.9G 90.7G 27.3G /rhosts/imgs/mob1
z2/rhosts/misc 27.1G 90.7G 23K /rhosts/misc
z2/rhosts/misc/bjp 20K 90.7G 20K /rhosts/misc/bjp
z2/rhosts/misc/harvey 27.1G 90.7G 27.1G /rhosts/misc/harvey
z2/rhosts/misc/mob1 20K 90.7G 20K /rhosts/misc/mob1
z2/win 34.8G 90.7G 34.6G /win
You see 366G Used and 90.7G Available
/bin/df -h
z2/pub 457G 5.0G 91G 6% /pub
z2/rhosts 457G 22K 91G 1% /rhosts
z2/rhosts/imgs 457G 23K 91G 1% /rhosts/imgs
z2/rhosts/imgs/bjp 457G 28G 91G 24% /rhosts/imgs/bjp
z2/rhosts/imgs/harvey 457G 18G 91G 17% /rhosts/imgs/harvey
z2/rhosts/imgs/harvey/ImagesMusic 457G 28G 91G 24%
/rhosts/imgs/harvey/ImagesMusic
z2/rhosts/imgs/mob1 457G 27G 91G 24% /rhosts/imgs/mob1
z2/rhosts/misc 457G 23K 91G 1% /rhosts/misc
z2/rhosts/misc/bjp 457G 20K 91G 1% /rhosts/misc/bjp
z2/rhosts/misc/harvey 457G 27G 91G 24% /rhosts/misc/harvey
z2/rhosts/misc/mob1 457G 20K 91G 1% /rhosts/misc/mob1
z2/win 457G 35G 91G 28% /win
z2 457G 19K 91G 1% /z2
Looks similar, but look again. If you add up the `used' column
(column 3) it only adds up to - 163 GB 127 KB
du -sh /pub /win /rhosts
5.0G /pub
35G /win
129G /rhosts
=====
169G
du almost agrees with /bin/df
But both du and /bin/df are around 200G smaller than either zpool or
zfs list.
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