Dear RFC Editor,
based on discussion in the last call of this doc, there are two editorial
changes that need to be applied with the AUTH48 for this document and that
were missed in the announcement. Please apply the following changes:
CURRENT:
"It is a powerful tool for solving bufferbloat [BLOAT], and we believe it to
be safe to turn on by default, as has already happened in a number of Linux
distributions.“
NEW:
"It is a powerful tool for solving bufferbloat [BLOAT], and has already been
turned on by default in a number of Linux distributions.“
and
CURRENT:
"We believe it to be a safe default and encourage people running Linux to
turn it on: It is a massive improvement over the previous default FIFO queue.“
NEW:
"In addition, a BSD implementation is available. All data resulting from
these trials has shown FQ-CoDel to be a massive improvement over the previous
default FIFO queue, and people are encouraged to turn it on."
Thanks,
Mirja
On 03.04.2016 16:05, The IESG wrote:
The IESG has approved the following document:
- 'The FlowQueue-CoDel Packet Scheduler and Active Queue Management
Algorithm'
(draft-ietf-aqm-fq-codel-06.txt) as Experimental RFC
This document is the product of the Active Queue Management and Packet
Scheduling Working Group.
The IESG contact persons are Spencer Dawkins and Martin Stiemerling.
A URL of this Internet Draft is:
https://datatracker.ietf.org/doc/draft-ietf-aqm-fq-codel/
Technical Summary
This memo presents the FQ-CoDel hybrid packet scheduler/AQM
algorithm, a powerful tool for fighting bufferbloat and reducing
latency.
FQ-CoDel mixes packets from multiple flows and reduces the impact of
head of line blocking from bursty traffic. It provides isolation for
low-rate traffic such as DNS, web, and videoconferencing traffic. It
improves utilisation across the networking fabric, especially for
bidirectional traffic, by keeping queue lengths short; and it can be
implemented in a memory- and CPU-efficient fashion across a wide
range of hardware.
Working Group Summary
An interesting aspect of this document is the combined use of CoDel with
FQ for improving flow-isolation properties. The working group had early
discussions about the differences between FQ and scheduling mechanisms
versus more pure AQM algorithms (like CoDel). This resulted in draft-
ietf-aqm-fq-implementation, which describes the terminology and
construction of hybrid systems. Any early disagreement in the WG about
this seems to have subsided after the subsequent discussions and work to
resolve terminology and scope.
Document Quality
Yes, there are existing implementations and deployments, including in
the Linux kernel. There have been other implementation efforts in
addition to the editors, and questions have been shared on the AQM
mailing list, with clarifications posted in draft updates. The Linux
implementation is from the editors of the document, and an independent
implementation in FreeBSD was done by Rasool As-Saadi at the Swinburne
University.
Personnel
Wes Eddy ([email protected]) is the Document Shepherd. Martin
Stiemerling is the responsible AD.
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