Queue management algorithm for computer network packets
For an official visit abroad taken by a member or members of the United States Congress, see Congressional delegation.
CoDel (Controlled Delay; pronounced "coddle") is an active queue management (AQM) algorithm in network routing, developed by Van Jacobson and Kathleen Nichols and published as RFC8289.[1] It is designed to overcome bufferbloat in networking hardware, such as routers, by setting limits on the delay network packets experience as they pass through buffers in this equipment. CoDel aims to improve on the overall performance of the random early detection (RED) algorithm by addressing some of its fundamental misconceptions, as perceived by Jacobson, and by being easier to manage.
In 2012, an implementation of CoDel was written by Dave Täht and Eric Dumazet for the Linux kernel and dual licensed under the GNU General Public License and the 3-clause BSD license. Dumazet's improvement on CoDel is called FQ-CoDel, standing for "Fair/Flow Queue CoDel"; it was first adopted as the standard AQM and packet scheduling solution in 2014 in the OpenWrt 14.07 release called "Barrier Breaker". From there, CoDel and FQ-CoDel have migrated into various downstream projects such as Tomato, dd-wrt, OPNsense and Ubiquiti's "Smart Queues" feature.
^Nichols, K.; Jacobson, V.; McGregor, A.; Iyengar, J. (Jan 2018). Controlled Delay Active Queue Management. IETF. doi:10.17487/RFC8289. RFC 8289.
use of network resources. CoDelco-author Van Jacobson recommends the use of fq_codel over codel where it's available. FQ-CoDel is published as RFC8290...
A parliamentary delegation (or congressional delegation, also CODEL or codel, in the United States) is an official visit abroad by a member or members...
to avoid an unnecessarily high buffering backlog. Examples include CoDel, FQ-CoDel and Random early detection. The Linux kernel packet scheduler is an...
making cutbacks. In early 2007, they released GETV back to Slutsky and Codel. Codel was let go as a full-time employee, though he continued producing videos...
explicit ecn parameter, by using the sfb discipline, by using the CoDel Fair Queuing (fq_codel) discipline, or the CAKE queuing discipline. Modern BSD implementations...
see TCP tuning AQM algorithms such as CoDel and PIE. Hybrid AQM and packet scheduling algorithms such as FQ-CoDel. Amendments to the DOCSIS standard to...
detection (RED), Explicit Congestion Notification (ECN), or controlled delay (CoDel). RFC 7567 recommends active queue management as a best practice. An Internet...
scheduler of the Linux kernel, with many available queuing disciplines. CoDel has been backported to Kernel 3.3. This encapsulates Traffic shaping to...
extending the FQ-Codel algorithm to work on multiple WiFi chips in Linux, reducing latency under load by up to a factor of 50. FQ-CoDel has since become...
for experiments around improving Wi-Fi. It is the first subject of a FQ-CoDel-based radio fairness improvement experiment by Make-Wifi-Fast. The driver...
take to get sent out, while bandwidth has primarily effects on throughput. CoDel — Controlled Delay. Attempts to combat bufferbloat. fairq — Fair Queuing...
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