[pve-devel] [PATCH v2 storage] api: fix get content call for volumes

[Fiona Ebner]

Am 07.03.23 um 09:51 schrieb Fabian Grünbichler:
> On March 7, 2023 9:31 am, Fiona Ebner wrote:
> 
> unfortunately not the case - a zvol can take up (significantly) more space than
> volsize:
> 
> $ zpool get ashift testpool
> NAME      PROPERTY  VALUE   SOURCE
> testpool  ashift    12      local
> $ zfs get volsize,volblocksize,space testpool/test
> NAME           PROPERTY              VALUE          SOURCE
> testpool/test  volsize               5G             local
> testpool/test  volblocksize          8K             default
> testpool/test  name                  testpool/test  -
> testpool/test  available             11.2G          -
> testpool/test  used                  7.43G          -
> testpool/test  usedbysnapshots       0B             -
> testpool/test  usedbydataset         7.32G          -
> testpool/test  usedbyrefreservation  111M           -
> testpool/test  usedbychildren        0B             -
> 
> this is the common "ashift=12 / volblocksize=8 / raidz2" pitfall..

Oh, right. Well, I'd say usedbydataset is still more consistent with the
current values for $used and I guess it's technically true even if $used
> $size.