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  • CentOS 7 一键安装最新内核并开启BBR

    CentOS 7 一键安装最新内核并开启BBR

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    开启BBR可以对网站访问速度起到一定的优化。BBR是Google开源的一种TCP网络拥塞优化算法。

    TCP BBR 致力于解决两个问题:在有一定丢包率的网络链路上充分利用带宽。降低网络链路上的 buffer 占用率,从而降低延迟。

    TCP 拥塞控制的目标是最大化利用网络上瓶颈链路的带宽。

    CentOS 7 一键安装最新内核并开启BBR
    -------------------------------------------------------------------------

    BBR一键安装脚本
    KVM架构使用

    https://teddysun.com/489.html

     

    内核检查输入命令:

    uname -r

     

    看到是 3.10 内核

    输入指令:

    wget --no-check-certificate https://github.com/teddysun/across/raw/master/bbr.sh && chmod +x bbr.sh && ./bbr.sh

     

    会看到你的系统信息:

    ---------- System Information ----------
     OS      : CentOS 7.7.1908
     Arch    : x86_64 (64 Bit)
     Kernel  : 3.10.0-1062.18.1.el7.x86_64
    ----------------------------------------
     Auto install latest kernel for TCP BBR
    
     URL: https://teddysun.com/489.html
    ----------------------------------------
    
    Press any key to start...or Press Ctrl+C to cancel

    敲任意键

    自动安装

    Complete!
    Info: The system needs to reboot.
    Do you want to restart system? [y/n]

    安裝完成 重开机输入 y

    SSH登入

    验证是否已安装并开启BBR

    uname -r

    显示结果为 5.6.8-1.el7.elrepo.x86_64 內核版本已更新到5.6

     

    敲入:

    sysctl net.ipv4.tcp_available_congestion_control

     

    返回值一般为:

    net.ipv4.tcp_available_congestion_control = reno cubic bbr

     

    敲入:

    sysctl net.ipv4.tcp_congestion_control

     

    返回值一般为:

    net.ipv4.tcp_congestion_control = bbr

     

    敲入:

    sysctl net.core.default_qdisc

     

    返回值一般为:

    net.core.default_qdisc = fq

     

    敲入:

    lsmod | grep bbr

    返回值有出现:

    tcp_bbr

    说明BBR已启动


    月光骑士
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