On Mon, Nov 14, 2016 at 11:23:04AM +0900, Ladislav Lhotka wrote:
> Hi,
> 
> I've read the revised-datastores-00 document, in general I like it, here
> are my initial comments and questions:
> 
> 1. Even if <intended> is valid, it can still be in conflict with the
>    actual content of <applied> that may come from e.g. dynamic
>    configuration protocols. How are such cases supposed to be resolved?

Yes. The whole idea is to expose these potential differences instead
of hiding them behind a curtain.

> 2. What is the distinction between dynamic configuration protocols and
>    control-plane protocols?

Good question. I believe this to be at the end implementation specific.
The question I think really is whether a control-plane protocol interacts
with the configuration management component or not.

> 3. Shared <candidate> has known problems. Maybe it's time to part with
>    it in this new datastore model?

This clearly was not the focus of this work.

> 4. Templates are briefly mentioned in several places, it would be useful
>    to explain this concept in more detail.

I agree.

> 5. Is it necessary that "<operational-state> datastore contains all
>    configuration data actually used by the system"? For example, static
>    routes should appear in RIBs, so having them separately in operational
>    state seems redundant.

I do not understand your question. Is the RIB exposed or not? Anyway,
we need a general model and not a model for specific aspects such as
routing. Yes, there can be redundancy but there can also be semantic
differences. The <operational-state> datastore tells me what is
actually used (regardless of what has happened with the statically
configured values). In other words, if I want to debug what my box is
actually doing, looking at the <operational-state> datastore is
probably a good idea.

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
Fax:   +49 421 200 3103         <http://www.jacobs-university.de/>

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