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Re: [Qemu-devel] -loadvm and disk only snapshot
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From: |
Eric Blake |
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Subject: |
Re: [Qemu-devel] -loadvm and disk only snapshot |
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Date: |
Wed, 16 Dec 2015 09:19:24 -0700 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
On 12/16/2015 05:12 AM, Vasiliy Tolstov wrote:
> Hi. I'm try to find some info how to run qemu vm from snapshot, but
> all pages contains info about running vm from full vm snapshot with
> memory state.
> What happening when i'm run qemu with -loadvm from disk only snapshot
> (created byblockdev-snapshot-internal-sync)?
Won't work (qemu is not able to load disk snapshots without memory).
What libvirt does instead is to use qemu-img snapshot -c to change the
snapshot back to the active layer, then boot qemu fresh on the correct
contents.
Of course, patches to change behavior aren't out of the question, but
there's already a lot of cruft there to be aware of, and making sure we
don't regress libvirt behavior.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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