Re: [Qemu-discuss] Live migration of VM

[Tony Su]

 IMO although likely possible, unlikely to ever be implemented unless
someone could describe a scenario common enough to warrant the effort.

The concepts behind doing a live migration exist and are implemented
in a few technologies (stability varies). If the code is closed
though, it may limit who might be able to build a solution that needs
this functionality. But, the principles are well known, ie. freeze a
snapshot, copy it (or its equivalent), track changes since the
snapshot, apply changes until the source and target are consistent
whereupon you can then execute switching over.
For a distro (OS) that runs on both the source and target are well
known, ie what is required for each platform and what is comparable to
what.

Assuming no special platform specific tuning, generic deployments that
mirror source and target are probably quite feasible, but the question
is if there are enough people who would want/need to do such a thing.

IMO,
Tony

On Tue, May 27, 2014 at 7:26 AM, Dale R. Worley <address@hidden> wrote:
>> From: On Behalf Of Prashant Upadhyaya
>> Sent: Friday, May 23, 2014 11:49 AM
>> To: address@hidden
>> Subject: [Qemu-discuss] Live migration of VM
>>
>> Is it possible to  live migrate a VM (emulating AMD) running on
>> native AMD to a machine running native ARM and back with QEMU ?
>
> It seems unlikely.  How would one implement such a thing?  You'd have
> to somehow convert a memory image full of AMD instructions into a
> memory image full of ARM instructions but still represents the same
> state of the same computation.
>
> Dale
>