[aqm] Alia Atlas' Yes on draft-ietf-aqm-codel-07: (with COMMENT)
Alia Atlas <akatlas@gmail.com> Thu, 13 April 2017 05:28 UTC
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From: Alia Atlas <akatlas@gmail.com>
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Date: Wed, 12 Apr 2017 22:28:47 -0700
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Subject: [aqm] Alia Atlas' Yes on draft-ietf-aqm-codel-07: (with COMMENT)
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Alia Atlas has entered the following ballot position for draft-ietf-aqm-codel-07: Yes 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 IESG DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: https://datatracker.ietf.org/doc/draft-ietf-aqm-codel/ ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- Thank you for a clear and very well written document. This was well worth staying up past 1am to read fully. I do have one primary comment and a couple minor points. First, the document status is Experimental. While encouraging experimentation, the document doesn't really articulate what the concerns are or how experimentation might determine that this should be changed to standards track. While regrettably I haven't personally followed the AQM work, I might assume that some of the issues to general applicability might be tied to aspects around the challenges of applying CoDel to a system architecture built around WRED AQM and enqueue complexity rather than dequeue complexity. Having a paragraph that gave context in the introduction for the questions still to be explored would be helpful. a) In Sec 3.4 : "This property of CoDel has been exploited in fq_codel [FQ-CODEL-ID], which hashes on the packet header fields to determine a specific bin, or sub-queue, for each five-tuple flow," For the general case of traffic, it would be better to focus on using a microflow's entropy information - whether that is derived from a 5-tuple, the IPv6 flow label, an MPLS Entropy label, etc. Tying this specifically to the 5-tuple is not ideal. Obviously I missed this for draft-ietf-aqm-fq-codel-06 - but even a slight rephrasing to "for each microflow, identifiable via five-tuple hash, src/dest + IPv6 flow label, or other entropy information" would encourage better understanding of micro-flow identification. Of course, this is just a comment - so do with it what you will. b) (Nit) In Sec 5.1: " We use this insight in the pseudo-code for CoDel later in the draft." The pseudo-code is actually earlier in the draft. Also s/draft/document for publication.
- Re: [aqm] Alia Atlas' Yes on draft-ietf-aqm-codel… Alia Atlas
- Re: [aqm] Alia Atlas' Yes on draft-ietf-aqm-codel… Mirja Kühlewind
- Re: [aqm] Alia Atlas' Yes on draft-ietf-aqm-codel… Jim Gettys
- Re: [aqm] Alia Atlas' Yes on draft-ietf-aqm-codel… Jim Gettys
- Re: [aqm] Alia Atlas' Yes on draft-ietf-aqm-codel… Dave Taht
- Re: [aqm] Alia Atlas' Yes on draft-ietf-aqm-codel… Mirja Kuehlewind (IETF)
- [aqm] Alia Atlas' Yes on draft-ietf-aqm-codel-07:… Alia Atlas