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

[Juergen Schoenwaelder <[e-mail]>]

On Thu, Jun 27, 2019 at 09:52:56PM +0200, Martin Bjorklund wrote:
> > Yes, good point, I think the phrase "by a different hardware
> > component" should be removed. It seems last-change should change when
> > I unplug a component and I plug it back shortly after, i.e., a
> > component is replaced by itself. So we have:
> > 
> >         "The last time a new hardware component has been added 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."
> 
> I think that this is still not clear what it means that a component
> has been replaced.  Do you mean "replaced by a different hardware
> component"?
> 
> Otherwise (unplug then plug in the same component), the system either
> detects the removal and thus updates last-change, or it doesn't detect
> the quick removal/insertion, and then it can't do anything.  Thus, I
> don't think this case needs special treatment, and the text could be
> just:
> 
>          "The last time a new hardware component has been added to the
>           '/hardware/component' list, or a hardware component has been
>           removed from the '/hardware/component' list."
>

The question is whether every implementor will figure out that if the
component found in some slot x-y-z is different from what is expected
to be in slot x-y-z, this must be seen as a remove + add combination.
If we include 'replace', then it may be clearer that even in the case
where what is in slot x-y-z has changed, the last-change must be
updated. (That is, the list element with the same name still exists
but it is different from what was there before with the same name.)

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: [phone]         Campus Ring 1 | 28759 Bremen | Germany
Fax:   [phone]         <https://www.jacobs-university.de/>