[ZFS] Prompt, which is lost space in the ZFS pool?

[Artem Belevich]

On Mon, Jul 18, 2011 at 2:03 PM, Vladislav V. Prodan <universite at ukr.net> wrote:
> 18.07.2011 22:12, Artem Belevich пишет:
>>
>> # zpool list tank
>>>
>>>  NAME   SIZE  ALLOC   FREE    CAP  DEDUP  HEALTH  ALTROOT
>>>  tank  1,34T  1,08T   270G    80%  1.00x  ONLINE  -
>
>>> >  tank/backup                 646G    397G    249G    61%    /backup
>>> >  tank/backup/third-server    626G    377G    249G    60%
>>> > /backup/third-server
>>
>> Perhaps here ^^^^^?
>
> All                     1340GB
> /backup                 397GB
> /backup/third-server    377GB
> /www                    21GB
> zfs snaphost            45GB
> free                    249GB
>
> Sorry, did not properly calculated.
> But the question is relevant. Where are the 250GB?

You've started with 600GB missing. Now it's 250GB. Looks like we've
just found 350GB. :-)

What does "zfs list -r -tall -o space tank" show? df does not give you
complete picture.

>
> It is also unclear, as is the free space.
> # zpool list tank says 270GB

zpool gives you raw numbers. That's what filesystem layer uses to store its data

> # df -h says 249GB free

"zfs list" or df would give you amount of usable disk space that
filesystem would make available to user. My guess is that this number
would be more relevant in most cases than the number zpool gives you.

--Artem

>
>
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> Vladislav V. Prodan
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