Re: [Qemu-devel] [RFC PATCH] replication agent module

[Stefan Hajnoczi]

On Wed, Feb 8, 2012 at 2:55 PM, Paolo Bonzini <address@hidden> wrote:
> On 02/08/2012 03:39 PM, Stefan Hajnoczi wrote:
>>
>>
>>> >  What about taking the existing Ceph/RBD driver in QEMU and changing it
>>> > to
>>> >  support arbitrary image formats rather than just raw?  That sounds
>>> > much much
>>> >  easier.  The main advantage is that Ceph has a user-space library for
>>> > use in
>>> >  the replication hub.  It also supports snapshots.
>>
>> I missed how Ceph/RBD helps.  Can you explain how we would use it?
>
>
> Ceph supports replication, you would just put images in a Ceph store rather
> than in a "normal" filesystem.

I don't think that meets the need to replicate guest I/Os before
they've been sliced and diced by an image format.

Stefan