[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [RFC] More robust migration
From: |
Paul Brook |
Subject: |
Re: [Qemu-devel] [RFC] More robust migration |
Date: |
Fri, 20 Feb 2009 16:47:26 +0000 |
User-agent: |
KMail/1.9.9 |
On Friday 20 February 2009, Jamie Lokier wrote:
> Paul Brook wrote:
> > I suspect that in practice live migration of a VM between different qemu
> > versions ends up comparable to in-place live kernel upgrades. i.e. it
> > takes an awful lot of work and care to make it happen, and in practice
> > isn't going to happen for any particularly useful span of versions.
>
> On the other hand, stored snapshots of guests which are ready to run
> in a particular state are quite useful. I'm under the impression the
> migration code is/will be useful for storing snapshots of system (not
> disk) state too. Is that right?
I don't think there's any real difference between snapshotting and migration
in this case. It's basically the same code.
I'm not saying it's a useless feature, just that it's very extremely to do
reliably, and for that reason unlikely to happen. An unreliable
implementation (i.e. one that claims to migrate/snapshot, then breaks some of
the time) is IMHO worse than nothing.
Paul
- [Qemu-devel] [RFC] More robust migration, Andre Przywara, 2009/02/20
- Re: [Qemu-devel] [RFC] More robust migration, Anthony Liguori, 2009/02/20
- Re: [Qemu-devel] [RFC] More robust migration, Paul Brook, 2009/02/20
- Re: [Qemu-devel] [RFC] More robust migration, Jamie Lokier, 2009/02/20
- Re: [Qemu-devel] [RFC] More robust migration,
Paul Brook <=
- Re: [Qemu-devel] [RFC] More robust migration, Jamie Lokier, 2009/02/22
- Re: [Qemu-devel] [RFC] More robust migration, Paul Brook, 2009/02/23
- Re: [Qemu-devel] [RFC] More robust migration, Jamie Lokier, 2009/02/23
- Re: [Qemu-devel] [RFC] More robust migration, Paul Brook, 2009/02/23
- Re: [Qemu-devel] [RFC] More robust migration, Anthony Liguori, 2009/02/23
- Re: [Qemu-devel] [RFC] More robust migration, Avi Kivity, 2009/02/24
Re: [Qemu-devel] [RFC] More robust migration, Jamie Lokier, 2009/02/20
[Qemu-devel] Re: [RFC] More robust migration, Charles Duffy, 2009/02/20