[aqm] Warren Kumari's Yes on draft-ietf-aqm-codel-07: (with COMMENT)

Warren Kumari <warren@kumari.net> Fri, 07 April 2017 17:44 UTC

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From: Warren Kumari <warren@kumari.net>
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Date: Fri, 07 Apr 2017 10:44:09 -0700
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Subject: [aqm] Warren Kumari's Yes on draft-ietf-aqm-codel-07: (with COMMENT)
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Warren Kumari has entered the following ballot position for
draft-ietf-aqm-codel-07: Yes

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I think that this is a useful document - I also think that it would make
a good introductory document to describe queuing for e.g a collage class.

I do have some readability suggestions to make it even better; these do
not need any action, but if the authors happen to edit the document for
any other reason, they may want to address them.

1: I found the overall structure of the document a little odd -- I'm
assuming that this is an artifact of its history, or merging multiple
documents into one, or similar. It starts off with a nice description of
queuing and CoDel. It then gets all technical with the pseudo-code (which
was really helpful). Where it feels a little odd is that it then suddenly
goes back to being much more introductory feeling (Section 5 - ), and
feels like it repeats some of the earlier material. Reformatting it all
to address this seems like overkill, but perhaps a readers note to
suggest people who want more background should skip ahead then come

2: Section 1.  Introduction
- "determined set point derived from maximizing the network power metric"
-- I'd suggest referencing Section 5.2 where power is explained (or, if
we assume readers understand this, section 5.2 can be dropped).

3: Section 3.  Overview of the Codel AQM
Sojourn time is a really important concept in this document, but it isn't
really defined - Section 5.1 is closest to defining it, but still not

4: Section 3.1
"The MTU size can be set adaptively to the largest packet seen so far or
can be read from the driver."
It was unclear what driver -- perhaps "interface driver" or simply

5: Section 3.2 has an opening parens but no closing one ("known or
measure (though ...").
This is a tiny nit, but set off my OCD tendencies :-)

6: Section 5.1
"We use this insight in the  pseudo-code for CoDel later in the draft.)
 - earlier in the draft...

Section 5.2: 
AIMD TCP could use a reference.