Re: [ippm] next steps with IPPM registry

[Juergen Schoenwaelder <[e-mail]>]

On Tue, Dec 01, 2015 at 06:39:31AM +0100, marcelo bagnulo braun wrote:
> Hi,
> 
> I understand that the only remaining open issue with the registry is to 
> figure out if/how we want to include machine readable information in it.
> 
> In order to figure this out, i understand the idea was for proponents of 
> doing so should explain the use cases they have in mind, so we can 
> understand if we want to do this and now.
> 
> I understand Barbara and Juergen were proposing this, so could you (or 
> anyone else who thinks this is a good idea) to explain the use cases?
>

I think the question is which role the registry plays in the overall
framework. Is it (i) primarily some form of documentation an MA can
refer to or (ii) is the idea that the registry is normative when it
comes to run-time parameters and data formats. In the later case, I
think it is desirable that tools can work with the portions of the
registry that are used by implementations in order to drive automation
(and this likely also requires putting restrictions on say parameter
names - for example, the parameter name '1/lambda' in
draft-morton-ippm-initial-registry-01.txt is likely troublesome if you
take it literally in implementations).

Perhaps the answer is in between, namely that the registry is
primarily documentation for humans and that a formalization of the
parameters that are relevant for implementations is a separate step
(e.g., for metric X in the registry, some human writes a concrete YANG
module defining the concrete configuration parameters to configure
metric X following the guidelines given in the registry).

If the registry is primarily documentation (and this is what section 5
might be saying), then I would prefer if parameters are described with
their semantics and units and precision but not the specific encoding.

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: [phone]         Campus Ring 1 | 28759 Bremen | Germany
Fax:   [phone]         <http://www.jacobs-university.de/>