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Re: [core] comi and NMDA (configuration and operational state datastore)

Andy Bierman <andy@yumaworks.com> Fri, 21 July 2017 01:57 UTC

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From: Andy Bierman <andy@yumaworks.com>
Date: Thu, 20 Jul 2017 18:57:32 -0700
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To: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>, Andy Bierman <andy@yumaworks.com>, Core <core@ietf.org>
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Subject: Re: [core] comi and NMDA (configuration and operational state datastore)
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On Thu, Jul 20, 2017 at 2:47 AM, Juergen Schoenwaelder <
j.schoenwaelder@jacobs-university.de> wrote:

> Hi,
>
> well, I am trying to understand what the scope of CoMI is. If CoMI is
> only for ~100k memory devices, you may be right.
>


IMO the NMDA stuff is only interesting if the device includes some sort of
dynamic configuration datastores (extremely unlikely). But in case I am
wrong,
CoMI provides full access to operation resources, so NETCONF operations
such as <edit-config> and <get-data> can be used if really needed.

A few obvious problems with using a multi-step editing process is that it
is not REST-full at all, it requires locking, it requires lock recovery
when the client goes away with outstanding locks, and it requires that
the client support lots of different server transaction models (i.e.,
just as heavyweight as NETCONF, but much harder without any session-based
interaction model).

We should be trying to make CoMI as simple as possible, not a binary
NETCONF.



> /js
>


Andy


>
> On Thu, Jul 20, 2017 at 02:44:13AM -0700, Andy Bierman wrote:
> > Hi,
> >
> > I doubt this will be a primary feature of CoMI.
> > It is similar to RESTCONF, attempting to hide datastores from the client.
> > It also allows access to any RPC (just like RESTCONF operation resources)
> > so protocol operations that support NMDA can be supported.
> >
> >
> > Andy
> >
> >
> > On Thu, Jul 20, 2017 at 1:33 AM, Juergen Schoenwaelder <
> > j.schoenwaelder@jacobs-university.de> wrote:
> >
> > > Hi,
> > >
> > > are there plans to make draft-ietf-core-comi-00 support NMDA
> > > (draft-ietf-netmod-revised-datastores-03)?
> > >
> > > /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/>
> > >
> > > _______________________________________________
> > > core mailing list
> > > core@ietf.org
> > > https://www.ietf.org/mailman/listinfo/core
> > >
>
> --
> 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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