BBR: Congestion-Based Congestion Control - ACM Queue
December 1, 2016 Volume 14, issue 5 PDF BBR: Congestion-Based Congestion Control Measuring bottleneck bandwidth and round-trip propagation time Neal Cardwell, Yuchung Cheng, C. Stephen Gunn, Soheil Hassas Yeganeh, Van Jacobson By all accounts, today's Internet is not moving data as well as it should. Most of the world's cellular users experience delays of seconds to minutes; public Wi-Fi in airpor
True Zero Downtime HAProxy Reloads
We have since migrated to a more robust solution that uses NGINX and HAProxy together to achieve our goals. See that solution here HAProxy: Cornerstone of Reliable Websites One primary goal of the infrastructure teams here at Yelp is to get as close to zero downtime as possible. This means that when users make requests for www.yelp.com we want to ensure that they get a response, and that they get
RITE
RITE will be present with a demonstration at the Bits N Bites in Prague. The EU RITE Project is addressing the root causes of end-to-end Internet delay. We demonstrate an adaptive interactive video together with our new DualQ Coupled AQM. The AQM allows a scalable TCP (DCTCP) to coexist with Classic TCP (Reno/Cubic) without inspecting flows. This … RITE has, since its start nearly two years ago, w
开始使用 HTTP/2 | JerryQu çš„åšå®¢
â— 本文最åŽæ›´æ–°äºŽÂ 3451 天å‰ï¼Œæ–‡ä¸æ‰€æè¿°çš„ä¿¡æ¯å¯èƒ½å·²å‘生改å˜ï¼Œè¯·è°¨æ…Žä½¿ç”¨ã€‚ 一直以æ¥ï¼Œæˆ‘çš„åšå®¢éƒ½åœ¨ä½¿ç”¨ Nginx。但它目å‰åªæ”¯æŒåˆ° SPDY/3.1，也ä¸æ”¯æŒ Server Push，一直是我的一å—心病。Nginx å®˜æ–¹è¯´ä»Šå¹´å¹´åº•ä¼šå¢žåŠ å¯¹ HTTP/2 的支æŒï¼Œè¿˜è¦ç‰å¥½ä¹…： We' re pleased to announce that we plan to release versions of both NGINX and NGINX Plus by the end of 2015 that will include support for HTTP/2. via ä¸ºäº†æ›´å¥½çš„ç ”ç©¶ HTTP/2 的一些新特性，我决定先找个替代å“çŽ©ä¸€æŠŠï¼Œç‰ Nginx 更新了å†æ¢å›žåŽ»ã€‚这里有一份列表，列出了目å‰å·²ç»æ”¯æŒ HTTP/2 的客户端和æœåŠ¡ç«¯ã€‚ç»è¿‡æ¯”较，我最终选择了 H2O。 H2O 是一
Tuning TCP and NGINX on EC2
Chartbeat measures and monetizes attention on the web. They were experiencing slow load times and TCP retransmissions due to default system settings. Tuning various TCP, NGINX and EC2 ELB settings like increasing buffers, disabling Nagle's algorithm, and enabling HTTP keep-alive resolved the issues and improved performance. These included tuning settings like net.ipv4.tcp_max_syn_backlog, net.core
Delay-gradient congestion control [LWN.net]
Network congestion-control algorithms have a difficult task to perform. They must moderate each endpoint's outgoing traffic to keep the Internet from being overwhelmed by packet congestion (as happened in 1986 before these algorithms were introduced). But, at the same time, the algorithm is expected to allow a machine to make full use of the bandwidth available to it, sharing that bandwidth with o
Mobile TCP optimization - lessons learned in production
I did a keynote presentation at the SIGCOMM'15 HotMiddlebox workshop, "Mobile TCP optimization - Lessons Learned in Production". The title was set before I had any idea of what I'd really be talking about, just that it'd be about some of the stuff we've been working on at Teclo. So apologies if the content isn't an exact match for the title. This post contains my slides, interleaved with my speake
QJump - By CamSaS
Guaranteed latency in datacenter networks QJump offers a range of network service levels, from guaranteed latency for low-rate, latency-sensitive network coordination services to line-rate throughput for data intensive services. See how it works » Ready to deploy QJump is implemented as a single kernel module using the Linux TC interface and a simple application utility to configure unmodified bin
Network Stack in Userspace (NUSE)
News dead or alive: Linux LibOS project in 2016 (a blog post, January 2016) Running the kernel in library mode (Linux Weekly News, April 2015) Introducing The Library Operating System For Linux (Phoronix, March 2015) What is this ? You invented a protocol in a kernel network stack: how do you spread your code? Ask kernel maintainer and wait until everyone use it ? Publish your patchset and ask eve
Coping with the TCP TIME-WAIT state on busy Linux servers | Vincent Bernat
TL;DR Do not enable net.ipv4.tcp_tw_recycle—it doesn’t even exist anymore since Linux 4.12. Most of the time, TIME-WAIT sockets are harmless. Otherwise, jump to the summary for the recommended solutions. The Linux kernel documentation is not very helpful about what net.ipv4.tcp_tw_recycle and net.ipv4.tcp_tw_reuse do. This lack of documentation opens the path to numerous tuning guides advising to
A tutorial for TCP-Linux
David X. Wei Netlab @ Caltech Initial Draft: May 2006; Revision 1 for parameter tunings: Sep 2007. This tutorial is dedicated to people who want to use TCP-Linux to do NS-2 simulations. For information on how to install TCP-Linux into NS-2, see TCP-Linux website. For general tutorials of NS-2, see the NS-2 website. Table of Content: Change your existing NS-2 simulation script to use TCP-Linux with
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http://blog.mbrt.it/2017-10-01-demystifying-container-networking/
Home - Tungsten Fabric
GitHub - facebook/fboss: Facebook Open Switching System Software for controlling network switches.
Project Calico - Secure Networking for the Cloud Native Era
GitHub - snabbco/snabb: Snabb: Simple and fast packet networking
http://fastpass.mit.edu/
https://packetlife.net/blog/2010/jun/7/understanding-tcp-sequence-acknowledgment-numbers/
TIME_WAIT and its design implications for protocols and scalable client server systems - ServerFramework.com
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