[core] Martin Duke's Discuss on draft-ietf-core-new-block-11: (with DISCUSS and COMMENT)
Martin Duke via Datatracker <noreply@ietf.org> Thu, 29 April 2021 23:23 UTC
Return-Path: <noreply@ietf.org>
X-Original-To: core@ietf.org
Delivered-To: core@ietfa.amsl.com
Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 15F9C3A1792; Thu, 29 Apr 2021 16:23:37 -0700 (PDT)
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
From: Martin Duke via Datatracker <noreply@ietf.org>
To: The IESG <iesg@ietf.org>
Cc: draft-ietf-core-new-block@ietf.org, core-chairs@ietf.org, core@ietf.org, marco.tiloca@ri.se, marco.tiloca@ri.se
X-Test-IDTracker: no
X-IETF-IDTracker: 7.28.0
Auto-Submitted: auto-generated
Precedence: bulk
Reply-To: Martin Duke <martin.h.duke@gmail.com>
Message-ID: <161973861706.19975.3092798532288165336@ietfa.amsl.com>
Date: Thu, 29 Apr 2021 16:23:37 -0700
Archived-At: <https://mailarchive.ietf.org/arch/msg/core/N3zqoZ-JCssZRsjuxqrmSNjj-ow>
Subject: [core] Martin Duke's Discuss on draft-ietf-core-new-block-11: (with DISCUSS and COMMENT)
X-BeenThere: core@ietf.org
X-Mailman-Version: 2.1.29
List-Id: "Constrained RESTful Environments \(CoRE\) Working Group list" <core.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/core>, <mailto:core-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/core/>
List-Post: <mailto:core@ietf.org>
List-Help: <mailto:core-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/core>, <mailto:core-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 29 Apr 2021 23:23:37 -0000
Martin Duke has entered the following ballot position for draft-ietf-core-new-block-11: Discuss When responding, please keep the subject line intact and reply to all email addresses included in the To and CC lines. (Feel free to cut this introductory paragraph, however.) Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html for more information about DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: https://datatracker.ietf.org/doc/draft-ietf-core-new-block/ ---------------------------------------------------------------------- DISCUSS: ---------------------------------------------------------------------- I am concerned about the convergence of three different provisions in this spec: - In (4.1), it says "To reliably get a rejection message, it is therefore REQUIRED that clients use a Confirmable message for determining support for Q-Block1 and Q-Block2 Options." IIUC this mandates that at least one request will use CON. - (7.1): all the blocks of a single body over an unreliable transport MUST either all be Confirmable or all be Non- confirmable. - (7.2) However, the other CON congestion control parameters will need to be tuned to cover this change. This tuning is out of scope of this document as it is expected that all requests and responses using Q-Block1 and Q-Block2 will be Non- confirmable (Section 3.2). I can't reconcile (4.1) with the last sentence in (7.2). Moreover, if my reading of (4.1) is correct, it's not sufficient to declare congestion control guidance out of scope when it's a mandated part of the protocol. ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- Thank you for the examples. They were useful in providing an overview of the protocol. Thanks also to Colin Perkins for an especially thoughtful TSVART review. Please address his comments, although his concerns about (7.1) are IMO mostly subsumed by my DISCUSS. - It would be useful to introduce the "token", "request tag", and "Etag" concepts before using them. Reading front-to-back, I spent most of Section 4 confused. - (4.4) It would be useful to state that clients MUST (SHOULD?) NOT request retransmission of blocks from ETags that are not "fresh" -- IIUC, they probably don't exist anymore, and anyway the server has no way of knowing which non-fresh ETag to serve beacuse it says "The ETag Option should not be used in the request for missing blocks" BTW, s/should/SHOULD - (7.2) If NON_PROBING_WAIT and NON_PARTIAL_TIMEOUT both "have the same value as computed for EXCHANGE_LIFETIME", why are they different variables? Or is that they SHOULD have the same value but might not? A normative word would be helpful here.
- [core] Martin Duke's Discuss on draft-ietf-core-n… Martin Duke via Datatracker
- Re: [core] Martin Duke's Discuss on draft-ietf-co… mohamed.boucadair
- Re: [core] Martin Duke's Discuss on draft-ietf-co… Martin Duke
- Re: [core] Martin Duke's Discuss on draft-ietf-co… mohamed.boucadair
- Re: [core] Martin Duke's Discuss on draft-ietf-co… Martin Duke
- Re: [core] Martin Duke's Discuss on draft-ietf-co… mohamed.boucadair
- Re: [core] Martin Duke's Discuss on draft-ietf-co… Martin Duke