Re: [Qemu-devel] [RFC PATCH 1/1] ceph/rbd block driver for qemu-kvm

[MORITA Kazutaka]

At Tue, 25 May 2010 10:12:53 -0700 (PDT),
Sage Weil wrote:
> 
> On Tue, 25 May 2010, Avi Kivity wrote:
> > > What's the reason for not having these drivers upstream? Do we gain
> > > anything by hiding them from our users and requiring them to install the
> > > drivers separately from somewhere else?
> > >    
> > 
> > Six months.
> 
> FWIW, we (Ceph) aren't complaining about the 6 month lag time (and I don't 
> think the Sheepdog guys are either).
> 
I agree.  We aren't complaining about it.

> From our perspective, the current BlockDriver abstraction is ideal, as it 
> represents the reality of qemu's interaction with storage.  Any 'external' 
> interface will be inferior to that in one way or another.  But either way, 
> we are perfectly willing to work with you to all to keep in sync with any 
> future BlockDriver API improvements.  It is worth our time investment even 
> if the API is less stable.
> 
I agree.

> The ability to dynamically load a shared object using the existing api 
> would make development a bit easier, but I'm not convinced it's better for 
> for users.  I think having ceph and sheepdog upstream with qemu will serve 
> end users best, and we at least are willing to spend the time to help 
> maintain that code in qemu.git.
> 
I agree.

Regards,

Kazutaka