Re: ZFS dataset stats

Testing with changing it over one one of the VMs and that fails.

zfs set volmode=geom storage/debian11-1/dsk1.vhd

Even after that ztop and gstat show nothing.

On 2022-07-15 08:14, Oleg Ginzburg wrote:
> On Fri, Jul 15, 2022 at 8:05 AM Zane C. B-H <v.velox@vvelox.net>
> wrote:
> 
>> So was just looking and for some reason nread etc for the ZFS
>> storage
>> stats.
>> 
>> Below is a example of a ZFS dataset being used by CBSD to store a
>> raw
>> disk image,
>> one that is running currently, but for some reasonn the R/W stats
>> don't
>> seem actually update.
>> 
>> kstat.zfs.storage.dataset.objset-0x1d41.nread: 0
>> kstat.zfs.storage.dataset.objset-0x1d41.reads: 0
>> kstat.zfs.storage.dataset.objset-0x1d41.nwritten: 0
>> kstat.zfs.storage.dataset.objset-0x1d41.writes: 0
>> kstat.zfs.storage.dataset.objset-0x1d41.dataset_name:
>> storage/debian10_test/dsk1.vhd
>> 
>> Is there any way to get ZFS to actually keep these up to date for
>> use
>> cases
>> like this?
> 
> Try to switch default ZFS volmode properties in CBSD from 'dev' to
> 'full' ( defaults:
> https://github.com/cbsd/cbsd/blob/develop/etc/defaults/zfs.conf ),
> e.g:
> 
> cat > ~cbsd/etc/zfs.conf <<EOF
> default_ci_zvol_volmode="geom"
> default_vm_zvol_volmode="geom"
> volmode="geom"
> EOF
> 
> in this case, new VMs will be created in a 'geom' mode:
> 
> # cbsd bcreate jname=vm1 vm_os_type=linux
> vm_os_profile=CentOS-7-x86_64 vm_ram=1g vm_cpus=1 runasap=1
> imgsize=10g
> 
> # zfs get volmode | grep dsk
> jails/mybbuilder130/dsk1.vhd
>    volmode   default  default
> jails/pxe1/dsk1.vhd
>    volmode   dev      local
> jails/ubvdi1/dsk1.vhd
>    volmode   default  default
> jails/vm1/dsk1.vhd
>    volmode   full     local
> jails/windows1/dsk1.vhd
>    volmode   default  default
> 
> if you are using cloud/gold images, you may have to delete and get
> them again