[libvirt-users] Rollback to running VM

Jackson, Gary L. Gary.Jackson at jhuapl.edu
Tue Sep 19 16:53:43 UTC 2017

Thanks! The vanilla snapshot-create-as and revert commands work just exactly the way I’d want them to. I’d gotten a bit confused by the documentation and went down a rabbit hole with external snapshots.

Is there any way to make the snapshot and restore faster, like maybe by a decimal order of magnitude? For example, will PXE booting the VM and running it entirely off of a RAM disk and also using a RAM disk for the backing store help?

Gary Jackson

From: Doug Hughes <doug.hughes at keystonenap.com>
Date: Tuesday, September 19, 2017 at 11:25 AM
To: "Jackson, Gary L." <Gary.Jackson at jhuapl.edu>, "libvirt-users at redhat.com" <libvirt-users at redhat.com>
Subject: Re: [libvirt-users] Rollback to running VM

According to this page: https://wiki.libvirt.org/page/Snapshots
It saves complete memory state, or crash-consistent disk state, but not both.

You probably want to test it thoroughly and see how it does.  I only use the disk-consistent snapshots.
On 9/19/2017 11:17 AM, Jackson, Gary L. wrote:

Will snapshot-revert restore the processor and memory state of the VM as it was at the time of the snapshot?

Doug Hughes
Keystone NAP
Fairless Hills, PA
1.844.KEYBLOCK (539.2562)

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