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On Fri, Nov 22, 2013 at 11:24:18AM -0500, Russell Bryant wrote:
> On 11/22/2013 11:17 AM, Jonathan Proulx wrote:
> > To add to the screams of others removing features from nova-network to
> > achieve parity with neutron is a non starter, and it rather scares me
> > to hear it suggested.
> 
> -1 from me too, so everyone can take a deep breath on this.  :-)
> 
> > Providing feature parity and easy cut over *should have been* priority
> > 1 when quantum split out of nova as it was for cinder (which was a
> > delightful and completely unnoticable transition)
> 
> +1
> 
> I think the experience with Neutron provides us some very good insight
> for future project splits/replacements.  We're working on establishing
> more clear requirements for project incubation and graduation in the TC.
>  One note I put down was that we should require that projects stay
> completely focused on being able to deprecate their replacement before
> adding *anything* else whenever possible.
> 
> A good example is the current discussion around a new scheduling
> service.  There have been lots of big ideas around this.  Robert Collins
> just started a thread about a proposal to start this project but with a
> very strict scope of being able to replace nova-scheduler, and *nothing*
> more until that's completely done.  I like that approach quite a bit.

I'd suggest something even stronger. If we want to split out code into
a new project, we should always follow the approach used for cinder.
ie the existing fully functional code should be pulled out as is, and
work then progress from there. That ensures we'd always have feature
parity from the very start. Yes, you might have to then do a large
amount of refactoring to get to where you want to be, but IMHO that's
preferrable to starting something from scratch and forgetting to cover
existing use cases.

Daniel
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