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Re: [netmod] submodules the hidden benefits

"Sterne, Jason (Nokia - CA/Ottawa)" <jason.sterne@nokia.com> Fri, 07 August 2020 21:40 UTC

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From: "Sterne, Jason (Nokia - CA/Ottawa)" <jason.sterne@nokia.com>
To: Mahesh Jethanandani <mjethanandani@gmail.com>, "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: [netmod] submodules the hidden benefits
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Date: Fri, 07 Aug 2020 21:40:00 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/B_kUvPmIQpXf4oYcxtR66-g5oO0>
Subject: Re: [netmod] submodules the hidden benefits
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I agree submodules can cause confusion, but I also agree with Mahesh that they can be useful to partition things for people using the modules. Especially for huge models (e.g. router vendor models). You can jump right to a subsection of the data (a bit like a document with chapters rather than one huge chapter).

It can also be useful for consumers of the models for versioning (when you want to avoid multiple namespaces). If a model is made up of 30 sub-modules, it might be useful to know that the "bgp" part changed while the other parts of the model didn't.

Jason

From: netmod <netmod-bounces@ietf.org> On Behalf Of Mahesh Jethanandani
Sent: Wednesday, August 5, 2020 6:43 PM
To: netmod@ietf.org
Subject: Re: [netmod] submodules the hidden benefits

A contrarian view:

I find the use of sub-modules helpful when I want to use separate files to maintain part of the module that is logically separate, while maintaining/restricting the use of them to a single namespace.
The fact that tools have a problem with trying to compile a sub-module can be addressed in the tools themselves.


On Aug 5, 2020, at 2:44 PM, Reshad Rahman (rrahman) <rrahman=40cisco.com@dmarc.ietf.org<mailto:rrahman=40cisco.com@dmarc.ietf.org>> wrote:

Indeed
https://github.com/netmod-wg/yang-next/issues/26

On 2020-08-05, 5:22 PM, "netmod on behalf of Vladimir Vassilev" <netmod-bounces@ietf.org on behalf of vladimir@lightside-instruments.com<mailto:netmod-bounces@ietf.org%20on%20behalf%20of%20vladimir@lightside-instruments.com>> wrote:

   On 05/08/2020 18.48, Juergen Schoenwaelder wrote:


I personally meanwhile believe that sub-modules add complexity with
little extra value but this view surely is not shared by others.

   +1. IMO removing sub-modules from YANG 2.0 should be on the list of
   proposed changes.

   /Vladimir

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