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Re: [Qemu-devel] tcmu-runner and QEMU
From: |
Benoît Canet |
Subject: |
Re: [Qemu-devel] tcmu-runner and QEMU |
Date: |
Thu, 4 Sep 2014 15:24:36 +0200 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
The Wednesday 03 Sep 2014 à 14:11:59 (+0100), Stefan Hajnoczi wrote :
> On Tue, Sep 02, 2014 at 05:20:55PM -0700, Andy Grover wrote:
> > On 09/02/2014 02:25 AM, Stefan Hajnoczi wrote:
> > > The qemu-lio tool would live in the QEMU codebase and reuse all the
> > > infrastructure. For example, it could include a QMP monitor just like
> > > the one you are adding to qemu-nbd.
> >
> > Benoit and I talked a little about QMP on another part of the thread... I
> > said I didn't think we needed a QMP monitor in qemu-lio-tcmu, but let me
> > spin up on qemu a little more and I'll be able to speak more intelligently.
>
> The QEMU block layer has useful features that are available as QMP
> commands:
>
> For example, the drive-mirror QMP command copies a disk image to a new
> location while still servicing I/O requests. This is used when an
> administrator needs to migrate disk images to a new file system or
> storage devices without downtime.
>
> There are other commands for snapshots and backup which are issued via
> QMP.
>
> It might even make sense to make the tcmu interface available at
> run-time in QEMU like the run-time NBD server. This allows you to get
> at read-only point-in-time snapshots while the guest is accessing the
> disk. See the nbd-server-start command in qapi/block.json.
>
> Stefan
Andy: ping
I hope we didn't scaried you with our monster block backend and it's
associated QMP socket ;)
- Re: [Qemu-devel] tcmu-runner and QEMU, Paolo Bonzini, 2014/09/01
- Re: [Qemu-devel] tcmu-runner and QEMU, Paolo Bonzini, 2014/09/01
- Re: [Qemu-devel] tcmu-runner and QEMU, Stefan Hajnoczi, 2014/09/02
- Re: [Qemu-devel] tcmu-runner and QEMU, Andy Grover, 2014/09/02
- Re: [Qemu-devel] tcmu-runner and QEMU, Paolo Bonzini, 2014/09/03
- Re: [Qemu-devel] tcmu-runner and QEMU, Stefan Hajnoczi, 2014/09/03
- Re: [Qemu-devel] tcmu-runner and QEMU,
Benoît Canet <=
- Re: [Qemu-devel] tcmu-runner and QEMU, Andy Grover, 2014/09/04
- Re: [Qemu-devel] tcmu-runner and QEMU, Benoît Canet, 2014/09/04
- Re: [Qemu-devel] tcmu-runner and QEMU, Stefan Hajnoczi, 2014/09/04