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Re: [Qemu-devel] Live Migration with different block devices
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] Live Migration with different block devices |
Date: |
Tue, 24 Jun 2014 14:41:10 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 |
On 06/24/2014 01:55 PM, Xiongzi Ge wrote:
> Hi Paolo,
>
> I am trying to do migration with two different block devices in the source
> and destination hosts. For example, in the source the data in /dev/vda
> are 'aaaaa'. The guest has a cache. These data are cached. In the other
> host, the data in this device are 'bbbbb'. If we do migration, I want
> the guest vm recognize this change. How does qemu deal with the cache
> data? Thanks.
If you want the guest to see different disk contents, then hotunplug the
original and hotplug in the new disk. Migration is NOT supposed to
change disk contents. Your problem is independent of migration.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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- [Qemu-devel] Live Migration with different block devices, Xiongzi Ge, 2014/06/24
- Re: [Qemu-devel] Live Migration with different block devices, Brian Jackson, 2014/06/24
- Re: [Qemu-devel] Live Migration with different block devices, Eric Blake, 2014/06/24
- Re: [Qemu-devel] Live Migration with different block devices, Xiongzi Ge, 2014/06/24
- Re: [Qemu-devel] Live Migration with different block devices, Eric Blake, 2014/06/24
- Re: [Qemu-devel] Live Migration with different block devices, Paolo Bonzini, 2014/06/25
- Re: [Qemu-devel] Live Migration with different block devices, Xiongzi Ge, 2014/06/25