Re: [i2rs] Kathleen Moriarty's No Objection on draft-ietf-i2rs-yang-l3-topology-08: (with COMMENT)

Juergen :

OK - I agree with the document section you've quoted.  Are there other ephemeral data stores?   Is <get-data datastore> and <write-data datastore> a reasonable extension of NETCONF to read/write from these datastores? 

Sue  

-----Original Message-----
From: i2rs [mailto:i2rs-bounces@ietf.org] On Behalf Of Juergen Schoenwaelder
Sent: Wednesday, January 25, 2017 2:05 PM
To: Susan Hares
Cc: i2rs@ietf.org; draft-ietf-i2rs-yang-l3-topology@ietf.org; 'Alia Atlas'; 'Giles Heron'; iesg@ietf.org; 'Lou Berger'
Subject: Re: [i2rs] Kathleen Moriarty's No Objection on draft-ietf-i2rs-yang-l3-topology-08: (with COMMENT)

Just search for ephemeral in the document and you will hit this:

   The model foresees control-plane datastores that are by definition
   not part of the persistent configuration of a device.  In some
   contexts, these have been termed ephemeral datastores since the
   information is ephemeral, i.e., lost upon reboot.  The control-plane
   datastores interact with the rest of the system through the <applied>
   or <operational-state> datastores, depending on the type of data they
   contain.  Note that the ephemeral datastore discussed in I2RS
   documents maps to a control-plane datastore in the revised datastore
   model described here.

/js

On Wed, Jan 25, 2017 at 01:58:13PM -0500, Susan Hares wrote:
> Juergen: 
> 
> Where do you think the revised data store model in that draft suggests ephemeral data stores live? 
> 
> Sue
> 
> -----Original Message-----
> From: i2rs [mailto:i2rs-bounces@ietf.org] On Behalf Of Juergen 
> Schoenwaelder
> Sent: Wednesday, January 25, 2017 1:54 PM
> To: Susan Hares
> Cc: i2rs@ietf.org; draft-ietf-i2rs-yang-l3-topology@ietf.org; 'Alia Atlas'; 'Giles Heron'; iesg@ietf.org; 'Lou Berger'
> Subject: Re: [i2rs] Kathleen Moriarty's No Objection on 
> draft-ietf-i2rs-yang-l3-topology-08: (with COMMENT)
> 
> Sue,
> 
> the current thinking is documented in
> draft-ietf-netmod-revised-datastores-00.txt.
> 
> /js
> 
> On Wed, Jan 25, 2017 at 12:52:47PM -0500, Susan Hares wrote:
> > Juergen: 
> >  
> > "And with the revised datastore model it will also be straight forward to have an implementation that just exposes topological data via the operational state datastore.  And the revised datastore model also paves the path to support datastores that can also inject ephemeral data."
> > 
> > Where do you believe the revised data store model suggest ephemeral data can be injected - (?written)? 
> > 
> > Sue
> > 
> > -----Original Message-----
> > From: i2rs [mailto:i2rs-bounces@ietf.org] On Behalf Of Juergen 
> > Schoenwaelder
> > Sent: Wednesday, January 25, 2017 10:33 AM
> > To: Giles Heron
> > Cc: draft-ietf-i2rs-yang-l3-topology@ietf.org; i2rs@ietf.org; Lou 
> > Berger; iesg@ietf.org; Alia Atlas
> > Subject: Re: [i2rs] Kathleen Moriarty's No Objection on
> > draft-ietf-i2rs-yang-l3-topology-08: (with COMMENT)
> > 
> > On Wed, Jan 25, 2017 at 03:19:58PM +0000, Giles Heron wrote:
> > > 
> > > > On 25 Jan 2017, at 15:18, Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> wrote:
> > > > 
> > > > On Wed, Jan 25, 2017 at 10:07:45AM -0500, Alia Atlas wrote:
> > > >> 
> > > >> So - if one has models - such as a writable topology - where 
> > > >> there can be dependencies on dynamic data, then those models 
> > > >> can't be in the configuration data-store as currently defined.
> > > >> 
> > > > 
> > > > Yes
> > > 
> > > but isn’t this confusing models and implementation?
> > 
> > I just confirmed that the old datastore model does not support writable ephemeral datastores. No more no less. And there is work in NETMOD (and NETCONF) to revise the datastore model and to make data model reuse in different datastores even simpler.
> >  
> > > if you have a case where you have a dependency on dynamic data then you can’t put that instantiation of the model in the configuration data-store.
> > > 
> > > but if your implementation never depends on dynamic data then it ought to be fine.
> > 
> > Yes. This should be fine.
> > 
> > And with the revised datastore model it will also be straight forward to have an implementation that just exposes topological data via the operational state datastore.  And the revised datastore model also paves the path to support datastores that can also inject ephemeral data.
> > 
> > /js
> > 
> > -- 
> > Juergen Schoenwaelder           Jacobs University Bremen gGmbH
> > Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
> > Fax:   +49 421 200 3103         <http://www.jacobs-university.de/>
> > 
> > _______________________________________________
> > i2rs mailing list
> > i2rs@ietf.org
> > https://www.ietf.org/mailman/listinfo/i2rs
> > 
> 
> -- 
> Juergen Schoenwaelder           Jacobs University Bremen gGmbH
> Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
> Fax:   +49 421 200 3103         <http://www.jacobs-university.de/>
> 
> _______________________________________________
> i2rs mailing list
> i2rs@ietf.org
> https://www.ietf.org/mailman/listinfo/i2rs
> 

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
Fax:   +49 421 200 3103         <http://www.jacobs-university.de/>

_______________________________________________
i2rs mailing list
i2rs@ietf.org
https://www.ietf.org/mailman/listinfo/i2rs