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Re: Compatibility question between versions

From: Alex Bennée
Subject: Re: Compatibility question between versions
Date: Fri, 12 Jun 2020 18:31:43 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)


> Hi,
> I've a question of compatibility between 2 versions of qemu (used with KVM on 
> CentOS servers).
> How a kvm guest with a qcow2 disk installed in qemu version 1.5.0 can
> work in qemu version 2.12.0 ? Is there backward compatibility ?

Yes - as long as the machine type is the same on both ends. Newer QEMU's
provide compatibility aliases for this reason (e.g. -M pc-i440fx-1.5).

> We currently use version 1.5.0 (CentOS 7) and we plan to use version 2.12.0 
> (CentOS 8), a guest seems to work after migration but I want to be sure that 
> I haven't forgotten anything
> Cordialement,
> * 

Alex Bennée

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