On 2017-12-07 23:19, Nir Soffer wrote:
> On Wed, Dec 6, 2017 at 6:02 PM Jason Lelievre <jlelievre@folksvfx.com
> <mailto:jlelievre@folksvfx.com>> wrote:
>
>     Hello,
>
>     What is the best way to set up a daily live snapshot for all VM, and
>     have the possibility to recover, for example, a specific VM to a
>     specific day?
>
>
> Each snapshot you create make reads and writes slower, as qemu has to
> lookup data through the entire chain.
>
> When we take a snapshot, we create a new file (or block device) and make
> the new file the active layer of the chain.

I'm not sure how much this is going to slow you down exactly, but I can
tell you that there are also incremental backups to look into.

(e.g. https://wiki.qemu.org/Features/IncrementalBackup)

Max