From: Eric Blake <eblake@redhat.com>
To: Xiongzi Ge <gexxx132@umn.edu>, Paolo Bonzini <pbonzini@redhat.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Live Migration with different block devices
Date: Tue, 24 Jun 2014 14:41:10 -0600 [thread overview]
Message-ID: <53A9E266.8080506@redhat.com> (raw)
In-Reply-To: <CACtCCo-4CoJLzOhpSHKgJ__Dx_RpjHM67MV4_ph4e1DpGD25Bw@mail.gmail.com>
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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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next prev parent reply other threads:[~2014-06-24 20:41 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-24 19:18 [Qemu-devel] Live Migration with different block devices Xiongzi Ge
2014-06-24 19:37 ` Paolo Bonzini
2014-06-24 19:55 ` Xiongzi Ge
2014-06-24 20:25 ` Paolo Bonzini
2014-06-24 20:34 ` Xiongzi Ge
2014-06-24 20:41 ` Eric Blake [this message]
2014-06-24 20:47 ` Paolo Bonzini
2014-06-24 21:26 ` Xiongzi Ge
2014-06-24 21:39 ` Christopher Covington
-- strict thread matches above, loose matches on Subject: below --
2014-06-24 19:22 Xiongzi Ge
2014-06-24 21:29 ` Brian Jackson
2014-06-24 23:16 ` Eric Blake
2014-06-25 0:08 ` Xiongzi Ge
2014-06-25 2:10 ` Eric Blake
2014-06-25 6:18 ` Paolo Bonzini
2014-06-25 14:14 ` Xiongzi Ge
2014-06-25 14:18 ` Paolo Bonzini
2014-06-25 14:32 ` Xiongzi Ge
2014-06-25 14:39 ` Paolo Bonzini
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