Re: [i2rs] Ephemeral State Requirements discussion

["Susan Hares" <[e-mail]>]

Don: 

In my understanding, no.   

I2RS should be able to augment the normal configuration with ephemeral
configuration (see the example in my presentation of Node-Type augmenting
bgp-global-config/config). 

I2RS should be able to augment the operational data store  (see the example
of my presentation of Node-Type augmenting bgp-global-config/state).  


Sue 

-----Original Message-----
From: i2rs [mailto:[e-mail]] On Behalf Of Fedyk, Don
Sent: Monday, June 06, 2016 2:52 PM
To: Juergen Schoenwaelder; Susan Hares
Cc: 'Jeffrey Haas'; [e-mail]; 'Joel M. Halpern'
Subject: Re: [i2rs] Ephemeral State Requirements discussion

Does this imply for a minor tweak of some operational datastore (temporary
link metric change or something similar) , I2RS ephemeral has to have its
own complete datastore?  

Don 

> -----Original Message-----
> From: i2rs [mailto:[e-mail]] On Behalf Of Juergen 
> Schoenwaelder
> Sent: Monday, June 06, 2016 2:31 PM
> To: Susan Hares <[e-mail]>
> Cc: 'Jeffrey Haas' <[e-mail]>; [e-mail]; 'Joel M. Halpern'
> <[e-mail]>
> Subject: Re: [i2rs] Ephemeral State Requirements discussion
> 
> On Mon, Jun 06, 2016 at 02:16:38PM -0400, Susan Hares wrote:
> > Juergen:
> >
> > I2RS Ephemeral Configuration - is configuration which needs 
> > validation, but does not survive a reboot.
> 
> Sue, 'validation' is not enough; there needs to be a clearer 
> definition what 'validation' means.
> 
> > I2RS data models which are "ephemeral at top node" and have 
> > operational state.  In these models, the operational state is like 
> > all other operational state.
> 
> The phrase 'ephemeral at top node' just confuses me.
> 
> > I suggest we focus on the I2RS ephemeral Configuration.  On this 
> > topic you stated below:
> >
> > "Again, for configuration datastores, I can obtain the config and 
> > validate it pretty much anywhere, on the device or offline at a 
> > controller. My understanding is that this would not be true for I2RS'
> > ephemeral stat datastores; I would need some amount of additional 
> > data to do something close to YANG's configuration datastore
validation."
> >
> > Why is this not true for ephemeral datastore?  I am missing any 
> > reason why you think this is true.
> 
> Configuration datastore validation works because data is 
> self-consistent without references to any (external) state. Are you 
> saying that the same is true for I2RS' ephemeral datastores?
> 
> /js
> 
> --
> Juergen Schoenwaelder           Jacobs University Bremen gGmbH
> Phone: [phone]         Campus Ring 1 | 28759 Bremen | Germany
> Fax:   [phone]         <http://www.jacobs-university.de/>
> 
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