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Recently, many of our netizens should have seen the Google open source TCP BBR Congestion control algorithm (referred to as BBR), we can apply to the regular KVM and Xen architecture VPS, server, to improve the speed of the server. Because of the changes to the kernel, vultr suggested that we use projects in some non-site environments, such as building Internet tools that are said to have a higher speed.In
Whether in the work, or in peacetime with the technical friends to discuss the issue of bbr, are inevitably faced with the "bbr and cubic between the contrast" problem, after all, Cubic in the Linux platform is the default congestion algorithm, has been for many Years.Now suddenly have a propaganda marvellous bbr algorithm, if really so good, that certainly is be
Before I enter the text of this article, I'll give you the background.1. First of all, I have the impact of the hippocampus typhoon on Shenzhen is very accurate, have seen my friends circle know, have not seen also do not need to know, White earned a day "Home Office" is the benefit, but the Home Office is not high efficiency, the effect is not good.2. Why I could have 3 blogs in the morning of Friday, on the one hand, in order to make up for the time wasted by typhoons causing "Home Office", on
I don't know how to say it. In short, the boat, from the mouth, I can not see HUANGFA and impoverished! I'm not going to say anything except cursing!Prior to BBR, there are two kinds of congestion control algorithms, based on packet loss and delay-based, regardless of which is based on detection, in other words, packet loss based on packet loss as a means to find congestion, and based on time-delay algorithm is to increase the delay as a means to find
Bbr-based cloud disk speed-up practices Female Declaration The speed of cloud disks is a hard indicator in the industry, and is a product reputation and image. Traditional acceleration methods are mostly based on proxy servers, and suitable proxies are used to connect users and storage servers. This method has some effect, but it is not solved based on the domestic network conditions and network principles. The b
I have repeatedly stressed that the BBR algorithm is a demarcation point, all TCP congestion control algorithm, is divided into bbr before and after BBR (in fact, this is not my personal point of view, many people think so, all want to write this article to find out). Of course, "all" here does not include those algorithms that are closed, such as the Spam compan
BBR Congestion control algorithm is the latest one-sided TCP congestion control algorithm developed by GoogleLinux kernel 4.9 has introduced this BBR algorithm, I am in CAC test ubuntu 14.04 install Linux 4.9 kernel, delay optimization effect and TCP connection speed increase significantly good Yu Rui speed!Ubuntu Update kernel, open bbr:https://github.com/imeiji/shadowsocks_install/wiki/%e5%bc%80%e5%90%aft
On CentOS 7, how does one deploy Google BBR [handling, turning over] And centosbbr? How to deploy Google BBR on CentOS 7 This article carries from https://www.vultr.com/docs/how-to-deploy-google-bbr-on-centos-7 [Note: The kernel version used at the time of this article is 4.9.0 and is 4.15.6 at present (version 4.15 is higher than version 4.9 )] Step 1: Use the
How to deploy Google BBR on CentOS 7 This article describes how to deploy Google BBR on CentOS 7. [Note: The kernel version used at the time of this article is 4.9.0 and is 4.15.6 at present (version 4.15 is higher than version 4.9 )] Step 1: Use the Elrepo RPM repository to upgrade the kernel To use BBR, You need to upgrade the kernel of CentOS 7 to 4.9.0 or abo
1. Modify system variablesEcho "net. Core. default_qdisc = FQ">/etc/sysctl. confEcho "net. ipv4.tcp _ congestion_control = BBR">/etc/sysctl. conf2. Save and take effectSysctl-P3. Check whether BBR is enabled in the kernel.Sysctl net. ipv4.tcp _ available_congestion_controlIt is enabled as follows:# Sysctl net. ipv4.tcp _ available_congestion_controlNet. ipv4.tcp _ available_congestion_control =
My blog: Guofang's blog bbr is from the Google Community Black technology, you can focus on the github of this continuous development of TCP congestion technology. What is the principle of this technique? I can not say clearly, see this explanation will understand more. The original TCP traffic transmission, has not been able to adapt to the current Internet, we compare TCP traffic to the traffic on the road, and the TCP transmission tunnel is the hig
Linux kernel 4.9 and above open TCP BBR congestion algorithmBBR the goal is to try to run full bandwidth, and try not to have a queuing situation, the effect is not faster than the speed of sharp differenceLinux kernel 4.9+ has supported TCP_BBR below to briefly describe how a KVM-based architecture VPS is powered onInstall Linux kernel version 4.9 and aboveGeneral installation of the latest version of the kernelDebian 8+/Ubuntu 14.04 Downloa
The kernel is required to be above 4.9, if not, upgrade the kernel.modprobe Tcp_bbr Echo " Tcp_bbr " >>/etc/modules-load.d/modules.confecho"net.core.default_qdisc= FQ" >>/etc/sysctl.confecho"net.ipv4.tcp_congestion_ Control=bbr" >>/etc/-psysctl Net.ipv4.tcp_available_congestion_ Controlsysctl Net.ipv4.tcp_congestion_controlUse the following command to query whether to open successfully:Lsmod grep BBRLinux Open TCP
Tags: implementation mechanism originally page organizes tables based on free article content index ClustFollowing the book on SQL tuning (SQL tuning or SQL optimization) in the essentials of high-performance SQL tuning and case resolution, we talk today about one of the most important core mechanisms of SQL tuning tec
Tags: and fast speaking tuning market buffer way a completely"High-performance SQL Tuning essentials and Case Resolution" a book has been launched, many enthusiastic readers on the contents of the book and some of the specific questions raised questions, because of the numerous readers plus my daily work busy, here on the SQL tuning learning to discuss and a unif
In-depth Java Program Performance tuning (Amdahl law, cache component, parallel development, thread pool, JVM tuning)Course Lecturer: SpecialCourse Category: Java coreSuitable for people: BeginnerNumber of lessons: 33 hoursUpdate level: CompleteUsing technology: Amdahl Law, caching components, parallel development, thread pooling, JVM tuningProjects involved: the use of patterns in practical developmentIn-d
Label:Original: SQL Server Tuning series advanced (How to index tuning)ObjectiveIn the previous article we analyzed the role of statistical information in the database, and we have learned how the database uses statistics to control the distribution of the contents of tables in the database. Children's shoes are not clear and can be clicked for reference.As a tuning
in 10g, Oracle launched its own SQL optimization aids : SQL Optimizer (SQL Tuning Advisor :STA) , it is the new Dbms_sqltune package. Use the STA to make sure that the optimizer is in CBO mode. but I think that using this tool is only suitable for people who don't understand SQL at all, and don't think that tools can solve problems. SQL is ultimately an expression of a business, how the tool might understand the business. SQL
I will share 11 practical tips on Java performance tuning and java Tuning Most developers think that performance optimization is a complicated problem and requires a lot of experience and knowledge. Yes, it is not wrong. It is not easy to optimize the application to achieve the best performance, but it does not mean that you cannot do anything before getting the experience and knowledge. Below are a few sug
SQL Server Performance Tuning methodology and common tools, SQL Server Tuning In earlier articles, we mentioned the DETECT methodology in Performance Tuning. Here we will briefly review the DETECT methodology. Discover the problem: found the problem Lead e the conditions: Explore causes Track down possible approaches: provides possible solutions Execute the most
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