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

Leandro Roggerone leandro at tecnetmza.com.ar
Thu Mar 5 20:44:46 CET 2020


Dear Mark, you said:
"Then every virtual disk that is created on that storage type is thin
provisioned."
Ok ... good to hear that.

So ... Lets suppose I created 5 VMs about 200Gb each on a 1TB space.
Im using less than 50% on each VM and now I need  to add a 6th VM ?  Even
Im using thin storage , I will have no free space.
What can I do ?
a) Should assign minimun capacity during creating time and enlarge later if
needed ?
b ) Should I look for unused space among existing  VMs and reduce the disk
?
Please let me know what is your criteria to assign storage to new VM.
Leandro.




El jue., 5 mar. 2020 a las 13:44, Mark Adams via pve-user (<
pve-user at pve.proxmox.com>) escribió:

>
>
>
> ---------- Forwarded message ----------
> From: Mark Adams <mark at openvs.co.uk>
> To: PVE User List <pve-user at pve.proxmox.com>
> Cc:
> Bcc:
> Date: Thu, 5 Mar 2020 16:43:08 +0000
> Subject: Re: [PVE-User] Creating VM with thin provisioning (please help me
> understand it).
> 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.
> >
> > <
> >
> https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail
> > >
> > Libre
> > de virus. www.avast.com
> > <
> >
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>
> ---------- Forwarded message ----------
> From: Mark Adams via pve-user <pve-user at pve.proxmox.com>
> To: PVE User List <pve-user at pve.proxmox.com>
> Cc: Mark Adams <mark at openvs.co.uk>
> Bcc:
> Date: Thu, 5 Mar 2020 16:43:08 +0000
> Subject: Re: [PVE-User] Creating VM with thin provisioning (please help me
> understand it).
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