On Sat, Mar 6, 2021, 09:13 Strahil Nikolov via Users <users@ovirt.org> wrote:
Commiting a snapshot means that you want to revert to that state, which means that all data afterwards is lost.
Even if you keep the latest snapshot, it won't be usefull.
For example you got the following:

Install -> snap1 -> some data -> snap2 -> some data -> snap3 -> some data -> Current State

If you revert to snap2 you will have the following:
Install -> snap1 -> some data -> snap2 -> some data -> Current State

(you always have some extra data generated - for example system logs)

As you can see, you can't use snap3 as you got some data after powering up the VM after the restore to snap2 and you will loose that.
User usually does not care of loosing such data if intentionally switches from snapshot to snapshot. I was expecting also the same behavior,  to be able to switch between intermediate snapshots without loosing the latest ones. I can do this with internal snapshots in plain KVM and this is very useful when testing different versions/snapshots of an application.

Best Regards,
Strahil Nikolov
On Fri, Mar 5, 2021 at 8:32, dhanaraj.ramesh--- via Users
Hi Team,

when I want to commit the older snapshots I'm getting warning stating " Existing snapshots that were taken after this one will be erased.". is there any way we can retain the latest snapshots as is in the chain?

I knew cloning and template export options are there to secure that latest snapshot data but these are will consume additional space in storage and take time.
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