Re: [netmod] WG Last Call: draft-ietf-netmod-revised-datastores-04 duplicaiton

Lou Berger <> Wed, 13 September 2017 16:56 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id 6F0851321DF for <>; Wed, 13 Sep 2017 09:56:40 -0700 (PDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -4.2
X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-2.8, RCVD_IN_SORBS_SPAM=0.5, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: (amavisd-new); dkim=pass (768-bit key)
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id vZs48VU1CzFq for <>; Wed, 13 Sep 2017 09:56:38 -0700 (PDT)
Received: from ( []) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by (Postfix) with ESMTPS id 147251321B6 for <>; Wed, 13 Sep 2017 09:56:38 -0700 (PDT)
Received: from cmgw3 (unknown []) by (Postfix) with ESMTP id B4C2D14058C for <>; Wed, 13 Sep 2017 10:56:36 -0600 (MDT)
Received: from ([]) by cmgw3 with id 94wZ1w00o2SSUrH014wcqV; Wed, 13 Sep 2017 10:56:36 -0600
X-Authority-Analysis: v=2.2 cv=K/VSJ2eI c=1 sm=1 tr=0 a=h1BC+oY+fLhyFmnTBx92Jg==:117 a=h1BC+oY+fLhyFmnTBx92Jg==:17 a=IkcTkHD0fZMA:10 a=xqWC_Br6kY4A:10 a=2JCJgTwv5E4A:10 a=wU2YTnxGAAAA:8 a=48vgC7mUAAAA:8 a=riEW31MorCH5E5iC0eoA:9 a=QEXdDO2ut3YA:10 a=Yz9wTY_ffGCQnEDHKrcv:22 a=w1C3t2QeGrPiZgrLijVG:22
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;; s=default; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:MIME-Version :Date:Message-ID:From:References:Cc:To:Subject:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=g933hkqaWeCdIFzm2OdA6ATgmhDhBtx7+IOVn+Qssxc=; b=x5S/weKNxdNgOLnND4oSn0a8XL +fH/PDA65pYnyAFqAXHng8Vf/miS3cYleAbtG9bbWzIG4nkUkHWnKEvMt+Dxjm6YeRCd13gvj3rvJ 1bPv1vtihmP3a43tu7v1DKoB3;
Received: from ([]:40716 helo=[IPv6:::1]) by with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.87) (envelope-from <>) id 1dsAxl-0049nF-FO; Wed, 13 Sep 2017 10:56:33 -0600
To: "t.petch" <>, netmod WG <>
References: <> <00bd01d32caf$4eb28e60$>
From: Lou Berger <>
Message-ID: <>
Date: Wed, 13 Sep 2017 12:56:31 -0400
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0
MIME-Version: 1.0
In-Reply-To: <00bd01d32caf$4eb28e60$>
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Content-Language: en-US
X-AntiAbuse: This header was added to track abuse, please include it with any abuse report
X-AntiAbuse: Primary Hostname -
X-AntiAbuse: Original Domain -
X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12]
X-AntiAbuse: Sender Address Domain -
X-BWhitelist: no
X-Exim-ID: 1dsAxl-0049nF-FO
X-Source-Sender: ([IPv6:::1]) []:40716
X-Email-Count: 4
X-Source-Cap: bGFibm1vYmk7bGFibm1vYmk7Ym94MzEzLmJsdWVob3N0LmNvbQ==
X-Local-Domain: yes
Archived-At: <>
Subject: Re: [netmod] WG Last Call: draft-ietf-netmod-revised-datastores-04 duplicaiton
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: NETMOD WG list <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Wed, 13 Sep 2017 16:56:40 -0000

> I believe that text such as this would make the I-D much easier to
> follow.  As it stands, you have to read between the lines and speculate.

    Thank you for the comments.  Do you have a specific change in mind,
or could your propose text, that would address this?


On 9/13/2017 12:42 PM, t.petch wrote:
> I think that in one respect, perhaps the key respect, this I-D fails to
> state the obvious (or at least what is likely obvious to those who have
> been at this for a while:-).
> The problem that is hinted at but never explicitly stated is that data
> objects can appear both as configuration and as state, e.g. when learned
> by other means or at other times.  The original model of datastores
> required these data objects to be modelled twice, as configuration false
> and as configuration true, and since there could be many of them, and
> the rules of YANG require them to be in separate trees, this led to a
> twin-trees approach such as can be seen in RFC7277 or RFC7223.
> Amongst other problems, this separation of operational state from
> configuration in a
>    separate branch in the data model has been found to be operationally
>    complicated and impacts the readability of module
>    definitions.  The relationship between
>    the branches is not machine readable and filter expressions operating
>    on configuration and on related operational state are different.
> With revised datastores, there is a single data object to model both
> values  but this now appears in two datastores, one for the
> configuration value, one for the operational state value.
> Instead of two YANG data nodes there is one data node in two datastores,
> a more elegant and simpler solution to the problem.
> I believe that text such as this would make the I-D much easier to
> follow.  As it stands, you have to read between the lines and speculate.
> Tom Petch
> ----- Original Message -----
> From: "Lou Berger" <>
> To: "netmod WG" <>
> Cc: <>;
> <>
> Sent: Friday, September 01, 2017 10:02 PM
>> All,
>> This starts a two week working group last call on
>> draft-ietf-netmod-revised-datastores-04.
>> The working group last call ends on September 17.
>> Please send your comments to the netmod mailing list.
>> Positive comments, e.g., "I've reviewed this document and
>> believe it is ready for publication", are welcome!
>> This is useful and important, even from authors.
>> Thank you,
>> Netmod Chairs
>> _______________________________________________
>> netmod mailing list