Re: [netconf] 答复: Which is the better way for vendor-specific extension?

[Jürgen Schönwälder <[e-mail]>]

On Thu, May 18, 2023 at 06:17:17AM +0000, yuchaode wrote:
> Hi Jan,
> 
> Thanks for your comments. I will send another email to NETMOD mailing list too.
> At the same time, I also add an example to explain why the augmentation is a heavy burden for the orchestrator.
> 
> If a orchestrator needs to coordinate multiple domain controllers who all have their owned extensions, and the source standard YANG data structure is very complex.
> Because that all the vendors can their owned extensions in any places, from orchestrator’s view, the overall data structure can look like:
> {
>   "ietf-example:root”: {
>     "attr-1”: a,
>     "attr-2”: b,
>     "attr-3”: c,
>     "vendor-a-ext:attr-4”: d,
>     "vendor-b-ext:attr-5": e,
>     "containter-1": {
>       "attr-6”: f,
>       "attr-7”: g,
>       "attr-8”: h,
>       "vendor-a-ext:attr-9”: i,
>       "vendor-c-ext:attr-10": j,
>       "vendor-d-ext:list-11”: [{
>         "attr-12”: k,
>         "attr-13”: l
>       }],
>       "list-14": [{
>         "attr-15”: m,
>         "attr-16”: n,
>         "attr-17”: o,
>         "vendor-a-ext:attr-18”: p,
>         "vendor-c-ext:container-19”: {
>           "attr-20”: q,
>           "attr-21”: r
>         }
>       }]
>     }
>   }
> }
> Please note that the attributes start with vendor-*-ext are extended by different vendors.
> We can see that, the extensions can be happened at any places with any format or structures. The orchestrator need to do a lot of judgement and adaption for these extension.

There are many ways to filter effectively in YANG. The 'judgement'
part does not change if you force hierarchical data into a flat list.
It is a feature that YANG allows augmentations at the place in the
hierarchy where it makes the most sense.

/js

-- 
Jürgen Schönwälder              Constructor University Bremen gGmbH
Phone: [phone]         Campus Ring 1 | 28759 Bremen | Germany
Fax:   [phone]         <https://constructor.university/>