Re: [netmod] 答复: FW: a question about ietf-hardware yang module

Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> Thu, 27 June 2019 05:41 UTC

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Date: Thu, 27 Jun 2019 07:40:59 +0200
From: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
To: "Fengchong (frank)" <frank.fengchong@huawei.com>
CC: Martin Bjorklund <mbj@tail-f.com>, Andy Bierman <andy@yumaworks.com>, "netmod@ietf.org" <netmod@ietf.org>
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Subject: Re: [netmod] =?utf-8?b?562U5aSNOiAgRlc6IGEgcXVlc3Rpb24gYWJvdXQgaWV0?= =?utf-8?q?f-hardware_yang_module?=
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On Thu, Jun 27, 2019 at 02:13:03AM +0000, Fengchong (frank) wrote:
> > 
> > I think the ambiguity is 'list changed' - does this mean that list 
> > entries are added/removed or does it include also the case where a 
> > property of a list entry has changed.
> 
> Ok.  Yes it is supposed to mean entry added/removed/modified.
> 
> But I can see another unclear thing - suppose I augment in an addtional leaf from my own model into this list.  Should last-change be updated if this new leaf is changed?
> 

A reasonable interpretation in my view is that hardware/last-change is
updated whenever

(1) a hardware component has been added
(2) a hardware component has been removed
(3) a hardware component has been replaced by a different hardware component

Here is an attempt for a new description:

         "The last time a new hardware component has been to the
          '/hardware/component' list, or a hardware component has
 	  been removed from the '/hardware/component' list, or a
          hardware component in the '/hardware/component' list has
          been replaced by a different hardware component."

The point is to define this based on the events that cause the set of
components to change instead of discussing leaf value changes.

/js

-- 
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/>