[PVE-User] Creating VM with thin provisioning (please help me understand it).

Mark Adams mark at openvs.co.uk
Thu Mar 5 17:43:08 CET 2020


Thin provisioning is set on the storage, it is a checkbox and of course it
has to be a storage type than can be thin provisioned (ie lvmthin, zfs,
ceph etc).

Then every virtual disk that is created on that storage type is thin
provisioned.

Regards,
Mark

On Thu, 5 Mar 2020, 16:28 Leandro Roggerone, <leandro at tecnetmza.com.ar>
wrote:

> Hi guys , here i am trying to get used to pve. (I came from VM ware EXSi).
> Im used to use "thin provisioning" option in vmware.
> It allowed me to set maximum drive space allocation but vm will use
> minimum and dynamically grow as guest OS needs
> .
> How should I accomplish same on pve  ?
> I created a VM and set 200GB at the storage capacity but can not set any
> flag about thin provisioning.
> Now , If I list lslbl , it  shows that created VM is taking the 200GB.
> root at pve:~# lsblk
> NAME                         MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
> sda                            8:0    0  5.5T  0 disk
> ├─sda1                         8:1    0 1007K  0 part
> ├─sda2                         8:2    0  512M  0 part
> └─sda3                         8:3    0  3.9T  0 part
>   ├─pve-swap                 253:0    0    8G  0 lvm  [SWAP]
>   ├─pve-root                 253:1    0  1.2T  0 lvm  /
>   ├─pve-data_tmeta           253:2    0 15.8G  0 lvm
>   │ └─pve-data-tpool         253:4    0  1.9T  0 lvm
>   │   ├─pve-data             253:5    0  1.9T  0 lvm
>   │   └─pve-vm--100--disk--0 253:6    0  200G  0 lvm
>   └─pve-data_tdata           253:3    0  1.9T  0 lvm
>     └─pve-data-tpool         253:4    0  1.9T  0 lvm
>       ├─pve-data             253:5    0  1.9T  0 lvm
>       └─pve-vm--100--disk--0 253:6    0  200G  0 lvm
> sr0                           11:0    1 1024M  0 rom
>
>
> I can see from gui , that is is possible to expand disk.
> So ... perhaps I should assign a little storage at beginning and then
> manually expand if needed.
> Please share your idea about this.
> I need to begin creating some VMs and work on them , I dont want to create
> in a wrong way and have to destroy later.
>
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