Re: Proposal: drop QPACK encoder stream framing

Spencer Dawkins at IETF <spencerdawkins.ietf@gmail.com> Thu, 07 June 2018 16:55 UTC

Return-Path: <spencerdawkins.ietf@gmail.com>
X-Original-To: quic@ietfa.amsl.com
Delivered-To: quic@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id BB85F130FD7 for <quic@ietfa.amsl.com>; Thu, 7 Jun 2018 09:55:39 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.998
X-Spam-Level:
X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5fTZVpzmliRE for <quic@ietfa.amsl.com>; Thu, 7 Jun 2018 09:55:36 -0700 (PDT)
Received: from mail-yb0-x22d.google.com (mail-yb0-x22d.google.com [IPv6:2607:f8b0:4002:c09::22d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 2AEA4131167 for <quic@ietf.org>; Thu, 7 Jun 2018 09:55:36 -0700 (PDT)
Received: by mail-yb0-x22d.google.com with SMTP id x6-v6so3439224ybl.12 for <quic@ietf.org>; Thu, 07 Jun 2018 09:55:36 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=4EqpINRHPoIuDxvcubWR4vpKUMxC64RLziVL6DgFaTo=; b=JHDgexr+meL6mL6FrtCirbgEA1Kl/hjldxi0JRCyUg+BjiKmH7Roh6apLB/BX4NKzu 2sdFGbqemxLI1pKDRjgirtjrhDgAhOdHPQBhZnHCNqTeMBcGsYr79OLNGKQQiSOBX7Xp KLlPplYCR8UeFtqPlJRCc/2pMVUGTrtPvOZEpDnWla0wB4m9/PZJGSVi9DEKCHklGJPv adEHE65eG/HjJ5OAXI0h94qWGdgKwWVkTxGCz9FdotMd28nFM7TDR259xVRA7iqpUeZg rRAg/0NCL0naIdTzkZ7W3wFEzPxcyU5HGbN/3AM+u6kbhlz2slqcFvkEM8XIvTH4L53r QRCw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=4EqpINRHPoIuDxvcubWR4vpKUMxC64RLziVL6DgFaTo=; b=fOMGIGUHmY+oCHWxeaRcfG4ALPTdrElCbtFkmhZ0gkL0EK7TD9vyh/3yb6gTl+rQE7 vZJqS1iC9lDW40cg++iPl2aY+vwLQgKa0je6273oWfkaoAlmMIiYzZscn4bNjQcxYkG4 a12B5SjqiLozp1rEYi2EXDDdjXODW/aTujAicoVubfiLydxJx+OYpO+nb7FH4PoPwuDt Xiyp02/K9EIK/7gAb5vV+BtD2oPjVpozFdPF+EBLck75PgjbEZmpmNvMab+2sirp0VH7 Qy8zSz5/RYxmIOr/5j40M7OMyqnB35Tl+hKaYZSKONy9BJlH+XGemWIHQGytXI+ff/iq 0vXw==
X-Gm-Message-State: APt69E1JEjxmcrnHTiYvk4ZD+9nFxtm1/1IbbP1W6fDNIpHxCMuqSuzk 9qLktBIzdOmKMd21gfsNmloxChI4DlDNm7uMqUcZ6Q==
X-Google-Smtp-Source: ADUXVKJWBRPOnsYQMQphSDyuICH7PYU7ZJYQpSIyLYQ3cQOOZ3/Rh2soQz5e/c2+jRGDAQrdnmNUGb7/GEjk5uqOzbI=
X-Received: by 2002:a25:9083:: with SMTP id t3-v6mr1554377ybl.71.1528390535030; Thu, 07 Jun 2018 09:55:35 -0700 (PDT)
MIME-Version: 1.0
References: <20180607151112.GA28823@ubuntu-dmitri>
In-Reply-To: <20180607151112.GA28823@ubuntu-dmitri>
From: Spencer Dawkins at IETF <spencerdawkins.ietf@gmail.com>
Date: Thu, 7 Jun 2018 11:55:23 -0500
Message-ID: <CAKKJt-cCqFUdVUGtGe1oJWzyFVnm7bTneprQ4ShssfVj0cEtKw@mail.gmail.com>
Subject: Re: Proposal: drop QPACK encoder stream framing
To: IETF QUIC WG <quic@ietf.org>
Content-Type: multipart/alternative; boundary="000000000000eb2f21056e10260f"
Archived-At: <https://mailarchive.ietf.org/arch/msg/quic/y6SZbSINfJN2EJTMSNMXboe_VLQ>
X-BeenThere: quic@ietf.org
X-Mailman-Version: 2.1.26
Precedence: list
List-Id: Main mailing list of the IETF QUIC working group <quic.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/quic>, <mailto:quic-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/quic/>
List-Post: <mailto:quic@ietf.org>
List-Help: <mailto:quic-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/quic>, <mailto:quic-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 07 Jun 2018 16:55:51 -0000

Hi, Dmitri,

This is me as an individual, asking a question, and NOT making an informed
observation or suggestion ... but I was curious.

On Thu, Jun 7, 2018 at 10:11 AM Dmitri Tikhonov <dtikhonov@litespeedtech.com>
wrote:

> Abstract
> --------
>
> The encoder block specified in Section 3.3 of draft-ietf-quic-qpack-00
> is unnecessary.  For reasons of efficiency, I propose that the framing
> be removed: let the encoder instructions be written and interpreted as
> a stream instead.
>

[snip]

I note that TSVWG  currently has two FECFRAME docs in WGLC now:

(1) https://datatracker.ietf.org/doc/draft-ietf-tsvwg-fecframe-ext/

(2) https://datatracker.ietf.org/doc/draft-ietf-tsvwg-rlc-fec-scheme/

The intent for these documents is to add support for sliding window FEC
codes to the RFC 6363 FEC Framework, which was limited to block FEC codes.

I don't know whether there is any relationship between your proposal
(moving from framing to a stream for compression) and the work currently in
TSVWG. I have some guesses, but not well-informed guesses, so thought I
should ask.

Thanks,

Spencer