Re: [netmod] WG adoption poll for draft-clemm-netmod-nmda-diff-00

Sure, one mandatory to implement format, others nice to have.
Interoperability good.  Agreed.

But why YANG-patch and not something built for the purpose
(e.g., YANG-diff) that, in particular, provides an actual diff as
opposed to a data-tree operation that only shows one of the
two values?

Kent // contributor

On 10/4/18, 3:27 PM, "Andy Bierman" <andy@yumaworks.com<mailto:andy@yumaworks.com>> wrote:

On Thu, Oct 4, 2018 at 12:07 PM, Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de<mailto:j.schoenwaelder@jacobs-university.de>> wrote:
Folks, the more formats there are, the less interoperability we
get. If there are multiple formats, is there a mandatory to implement
format? Does the mandatory to implement format depend on the protocol
that is being used?

I prefer one format or if necessary I am fine with one mandatory to
implement format. An open ended collection of implementation specific
formats is super flexible but defeats the purpose of a standard,
namely interoperability.

I agree there needs to be 1 mandatory-to-implement format.

IMO this needs to be YANG Patch because it is more precise then constructing an XML tree with
operation attributes in it (e.g., how else do you represent a delete or a move?)
Also, YANG Push is using YANG Patch format and common code for push and diff would be
possible.

I think other formats should be allowed.
This is very tool-specific. I could see how somebody might want
a textual patch of the XML representation to produce the new XML representation.

/js

Andy

On Thu, Oct 04, 2018 at 05:41:22PM +0000, Kent Watsen wrote:
> We agree that the diff-format should be client-selectable, modulo what the server supports.  yang-patch and edit-config both are viable.  Should we document them both?
>
> That said, since neither edit-config nor yang-patch are diffing formats, so much as formats for converting one data tree to another, would it make sense to define an actual diffing format?  I would think that a diff would provide both values, not just a new value.
>
> Kent // contributor
>
>
> -----Original Message-----
> From: netmod <netmod-bounces@ietf.org<mailto:netmod-bounces@ietf.org>> on behalf of Ladislav Lhotka <lhotka@nic.cz<mailto:lhotka@nic.cz>>
> Organization: CZ.NIC
> Date: Thursday, October 4, 2018 at 1:11 PM
> To: Robert Wilton <rwilton@cisco.com<mailto:rwilton@cisco.com>>, "netmod@ietf.org<mailto:netmod@ietf.org>" <netmod@ietf.org<mailto:netmod@ietf.org>>
> Subject: Re: [netmod] WG adoption poll for draft-clemm-netmod-nmda-diff-00
>
> On Thu, 2018-10-04 at 14:17 +0100, Robert Wilton wrote:
> >
> > On 04/10/2018 13:51, Ladislav Lhotka wrote:
> > > On Thu, 2018-10-04 at 13:36 +0100, Robert Wilton wrote:
> > > > On 04/10/2018 11:14, Martin Bjorklund wrote:
> > > > > Phil Shafer <phil@juniper.net<mailto:phil@juniper.net>> wrote:
> > > > > > Bal?zs Lengyel writes:
> > > > > > > https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_draft-2Dclemm-2Dnetmod-2Dnmda-2Ddiff-2D00&d=DwICAg&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=9zkP0xnJUvZGJ9EPoOH7Yhqn2gsBYaGTvjISlaJdcZo&m=7s6VdzzH9Ol3BOCbVLBarBrQ5fD0vTt8k_I2KDEN97c&s=gQWJtjc_2EF3QgRvABgZKsjqzuIw9yUq_xee6aFJOcw&e=
> > > > > > [I've moved to a "deep lurker" role here, but ...]
> > > > > >
> > > > > > Can we ensure this model contains a "format" leaf in the RPC's input
> > > > > > so that future (and proprietary) formats can be supported?   That
> > > > > > leaf can be an identityref that defaults to yang-patch.
> > > > > I think this is a good idea.  I would prefer the edit-config format
> > > > > over YANG patch for describing a diff.  The edit-config format is more
> > > > > suited for this purpose imo.
> > > > +1
> > > >
> > > > I would like something closer to edit-config to be available via
> > > > RESTCONF as well.
> > > YANG Patch is IMO better because it clearly separates the target for the
> > > edits
> > > from the new content.
> > > In edit-config these two are mixed together.
> > Yes, that is primarily why I prefer the edit-config.  I perceive that it
> > is a denser and more efficient format.  I think that it is both easier
> > to construct (when diffing two trees) and also more efficient to apply
> > when generating an updated tree.
>
> Except for certain corner cases, for example if two trees differ only in the
> value of a single leaf but this leaf happens to be a list key.
>
> Lada
>
> >
> > Thanks,
> > Rob
> >
> >
> > > That being said, I support specifying format/media-type and having
> > > potentially
> > > multiple options.
> > >
> > > Lada
> > >
> > > > Thanks,
> > > > Rob
> > > >
> > > >
> > > > > /martin
> > > > >
> > > > > _______________________________________________
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> > > > > .
> > > > >
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> --
> Ladislav Lhotka
> Head, CZ.NIC Labs
> PGP Key ID: 0xB8F92B08A9F76C67
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--
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
Fax:   +49 421 200 3103         <https://www.jacobs-university.de/<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.jacobs-2Duniversity.de_&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=9zkP0xnJUvZGJ9EPoOH7Yhqn2gsBYaGTvjISlaJdcZo&m=O7d-b9gyPvsasJo1ueKk3doDH7f5S5WQLo8_W6W3qt4&s=zh7qEPSmwviaSqZBqG1GcqItXwI9pwyqIFVW6xC8rK8&e=>>

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