[pve-devel] Proxmox VE 4.0 beta2 released!

Thomas Lamprecht t.lamprecht at proxmox.com
Thu Sep 10 16:46:01 CEST 2015


qcow2, as a copy on write format, allows snapshots regardless of the 
storage under it.
Also qcow2 is thin provisioned, that means it grows as you add data 
(doesn't shrinks automatically) whereas with raw the whole image size 
gets allocated on creation.
qcow2 has some overhead in comparison to raw.

On 09/10/2015 04:17 PM, Gilberto Nunes wrote:
> Now I see... As Emmanuel said, QCOW2 or RAW is related about snapshots...
> My mistake...
> But, even so, is there some advantage about QCOW2 rather than RAW??
>
> 2015-09-10 11:13 GMT-03:00 Dietmar Maurer <dietmar at proxmox.com 
> <mailto:dietmar at proxmox.com>>:
>
>     > Well... AFAIK, DRBD9 storage only support RAW disc, and RAW disc do not
>     > support online resize disk, right? Only QCOW2 support it...
>     Forgive me if I
>     > am wrong!
>
>     No, you are wrong. We do not use qcow2 for containers.
>
>
>
>
> -- 
>
> Gilberto Ferreira
> +55 (47) 9676-7530
> Skype: gilberto.nunes36
>
>
>
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