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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. 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.

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  • CoDel (de)
  • CoDel (en)
  • CoDel (zh)
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  • 在网络路由中,CoDel(Controlled Delay,发音为“ ”)是Van Jacobson和开发的中使用的调度算法 。 它旨在通过设置缓冲区中网络数据包的延迟限制来克服网络硬件(如路由器)中的 缓冲膨胀 ,改善了(RED)算法的整体性能,解决了Jacobson 开发 RED 时抱有的一些误解,设计上 CoDel 比 RED 更容易管理和配置。 2012年,DaveTäht和Eric Dumazet为Linux内核编写了CoDel的实现,并以GNU通用公共许可证和3条款BSD许可证双重许可发布。 Dumazet的CoDel变体称为fq_codel,代表“控制延迟”。它在OpenWrt版本“ Barrier Breaker”中被用作标准(AQM)和数据包调度解决方案。自这之后,CoDel和fq_codel 迁移到了各种下游项目,例如Tomato ,dd-wrt和OPNsense 。 (zh)
  • 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. 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. (en)
  • CoDel (ausgesprochen „koddel“) steht für controlled delay und bezeichnet einen Algorithmus zum in Computernetzwerken. Designziel war die Vermeidung von Netzwerküberlastungen, welche durch den sog. Bufferbloat verursacht werden. Er wurde von und Van Jacobson entwickelt und als RFC 8289 veröffentlicht. und ist ab Version 3.5 im Linux-Kernel enthalten, wurde aber von manchen Projekten, wie z. B. OpenWrt, auch auf ältere Kernel portiert. Heute wird allerdings vorwiegend die Weiterentwicklung eingesetzt. (de)
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  • CoDel (ausgesprochen „koddel“) steht für controlled delay und bezeichnet einen Algorithmus zum in Computernetzwerken. Designziel war die Vermeidung von Netzwerküberlastungen, welche durch den sog. Bufferbloat verursacht werden. Er wurde von und Van Jacobson entwickelt und als RFC 8289 veröffentlicht. Klassischen passive Pufferverwaltungsalgorithmen, wie etwa FIFO, verwerfen eingehende Pakete, wenn der Puffer voll ist. CoDel hingegen wählt gezielt Pakete zum Verwerfen aus und löscht diese frühzeitig aus dem Puffer um die Latenz gering zu halten. Damit zählt CoDel zur Klasse der aktiven Pufferverwaltungsalgorithmen. und ist ab Version 3.5 im Linux-Kernel enthalten, wurde aber von manchen Projekten, wie z. B. OpenWrt, auch auf ältere Kernel portiert. Heute wird allerdings vorwiegend die Weiterentwicklung eingesetzt. (de)
  • 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. 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 , 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. (en)
  • 在网络路由中,CoDel(Controlled Delay,发音为“ ”)是Van Jacobson和开发的中使用的调度算法 。 它旨在通过设置缓冲区中网络数据包的延迟限制来克服网络硬件(如路由器)中的 缓冲膨胀 ,改善了(RED)算法的整体性能,解决了Jacobson 开发 RED 时抱有的一些误解,设计上 CoDel 比 RED 更容易管理和配置。 2012年,DaveTäht和Eric Dumazet为Linux内核编写了CoDel的实现,并以GNU通用公共许可证和3条款BSD许可证双重许可发布。 Dumazet的CoDel变体称为fq_codel,代表“控制延迟”。它在OpenWrt版本“ Barrier Breaker”中被用作标准(AQM)和数据包调度解决方案。自这之后,CoDel和fq_codel 迁移到了各种下游项目,例如Tomato ,dd-wrt和OPNsense 。 (zh)
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