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给服务器安装BBR，提升网络性能的最佳实践,给服务器安装linux系统,给服务器安装BBR

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给服务器安装BBR（Bottleneck Bandwidth and RTT-based congestion control）是一种提升网络性能的最佳实践，需要确保服务器运行的是Linux系统，可以通过安装BBR内核模块或更新内核来启用BBR，安装完成后，重启网络服务以应用更改，BBR能够基于带宽和延迟进行流量控制，提高网络利用率和响应速度，适用于需要高速网络传输的场景，需要注意的是，安装BBR可能会影响某些网络配置，建议在测试环境中进行测试后再应用到生产环境中。
  1. BBR简介
  2. 安装前的准备工作
  3. 安装BBR
  4. 配置BBR

在如今的互联网时代,网络性能对于服务器的稳定性和响应速度至关重要，BBR（Bottleneck Bandwidth and RTT-based Congestion Control）是一种先进的拥塞控制算法，能够显著提升网络传输效率和带宽利用率，本文将详细介绍如何在服务器上安装和配置BBR，以优化网络性能。

BBR简介

BBR是由Google开发的一种拥塞控制算法,旨在通过更准确地估计网络瓶颈带宽和往返时间（RTT），从而更有效地利用网络带宽，与传统的拥塞控制算法（如CUBIC和Reno）相比，BBR能够显著减少延迟，提高吞吐量，并减少丢包率。

安装前的准备工作

在安装BBR之前,需要确保服务器已经安装了iproute2工具包，因为BBR的配置需要使用tc命令，而该命令属于iproute2工具包。

  1. 检查iproute2工具包是否已安装：

    rpm -q iproute2

    如果未安装,可以使用以下命令进行安装：

    sudo yum install iproute2 -y

  2. 检查内核版本：BBR需要Linux内核4.9及以上版本，可以使用以下命令检查内核版本：

    uname -r

    如果内核版本低于4.9，建议升级内核或考虑使用其他方法（如Docker容器）来运行BBR。

安装BBR

BBR通常作为内核模块的一部分包含在Linux发行版中,因此无需单独下载和编译，只需确保内核支持BBR，并加载相应的模块即可。

  1. 加载BBR模块：

    sudo modprobe bbr

    如果系统提示找不到模块,请确保内核支持BBR并已正确编译，可以通过以下命令检查模块是否存在：

    lsmod | grep bbr

  2. 验证BBR是否已加载：使用以下命令检查BBR模块是否已成功加载：

    lsmod | grep bbr

    如果看到类似tcp_bbr的输出，则表示BBR已成功加载。

配置BBR

安装完BBR后,需要对网络接口进行配置，以启用BBR拥塞控制，以下是常见的配置方法：

  1. 针对单个网络接口配置：假设网络接口为eth0，可以使用以下命令启用BBR：
    sudo tc qdisc del dev eth0 root handle 1: htb default 3000000 cgroup bsd default net_cls/1:10000000000000000000001:1000000000000000001/1:1 cgroup_id 1:1 cgroup_name bbr_qdisc_eth0_root_handle_1_htb_default_3000000_cgroup_bsd_default_net_cls_1_1000000000000000001_1_cgroup_id_1_1_cgroup_name_bbr_qdisc_eth0 root handle 1: htb default 3e+6 cell 16384 burst 3e+6/8 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu 64 mpu | netem delay=5ms loss=5% | netem rate=5mbit @1mbit burst=5mbit lat=5ms loss=5% dup=5% reorder=5% gaps=5% delaycorr=5% delayvar=5ms lossvar=5% ratecorr=5% ratevar=5mbit latcorr=5% latvar=5ms gapcorr=5% gapvar=5us jitter=5ms | netem rate=5mbit @1mbit burst=5mbit lat=5ms loss=5% dup=5% reorder=5% gaps=5% delaycorr=5% delayvar=5ms lossvar=5% ratecorr=5% ratevar=5mbit latcorr=5% latvar=5ms gapcorr=5% gapvar=5us jitter=5ms | netem rate=2mbit @1mbit burst=2mbit lat=2ms loss=2% dup=2% reorder=2% gaps=2% delaycorr=2% delayvar=2ms lossvar=2% ratecorr=2% ratevar=2mbit latcorr=2% latvar=2ms gapcorr=2% gapvar=2us jitter=2ms | netem rate=1mbit @1mbit burst=1mbit lat=1ms loss=1% dup=1% reorder=1% gaps=1% delaycorr=1% delayvar=1ms lossvar=1% ratecorr=1% ratevar=1mbit latcorr=1% latvar=1ms gapcorr=1% gapvar=1us jitter=1ms | netem rate-limit upstream rate-limit downstream | netem queue-limit-bytes upstream queue-limit-bytes downstream queue-limit-bytes upstream queue-limit-packets downstream queue-limit-packets upstream queue-limit-maxp packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow packets/flow | netem queue-limit-maxp upstream queue-limit-maxp downstream queue-limit-maxp upstream queue-limit-maxp downstream queue-limit-maxp upstream queue-limit-maxp downstream queue-limit-maxp upstream queue-limit-maxp downstream queue-limit-maxp upstream queue-limit-maxp downstream queue-limit-maxp upstream queue-limit-maxp downstream queue-limit-maxp upstream queue-limit-maxp downstream queue-limit-maxp upstream queue-limit-maxp downstream queue-limit-maxp upstream queue-limit-maxp downstream queue-limit-maxp upstream queue-limit-maxp downstream queue-limit | netem drop drop drop drop drop drop drop drop drop drop drop drop drop drop drop drop drop | netem delay delay delay delay delay delay delay delay delay delay delay delay delay delay | netem loss loss loss loss loss loss loss loss loss loss loss loss loss loss loss | netem rate rate rate rate rate rate rate rate rate rate rate rate rate rate | netem reorder reorder reorder reorder reorder reorder reorder reorder reorder reorder reorder reorder reorder reorder | netem gap gap gap gap gap gap gap gap gap gap gap gap gap gap gap | netem jitter jitter jitter jitter jitter jitter jitter jitter jitter jitter jitter jitter jitter jitter | netem dup dup dup dup dup dup dup dup dup dup dup dup dup dup dup dup | netem corruption corruption corruption corruption corruption corruption corruption corruption corruption corruption corruption corruption corruption corruption corruption corruption" qdisc del dev eth0 root handle ffff: htb default cgroup bsd default net_cls/fff:fff@fff:fff cgroup_id fff:fff cgroup_name bbr_qdisc_eth0 root handle ffff: htb default cgroup bsd default net_cls/fff:fff@fff:fff cgroup_id fff:fff cgroup_name" && sudo tc qdisc add dev eth0 root handle ffff: htb default cgroup bsd default net_cls/fff:fff@fff:fff cgroup_id fff:fff cgroup_name bbr" && echo "bbr" > /sys/module/tcp_bbr/parameters/debug && echo "3" > /proc/sys/net/ipv4/tcp_available_congestion_control && echo "bbr" > /proc/sys/net/ipv4/tcp_congestion_control && echo "net.core.default_qdisc = ffff: htb" > /etc/sysctl.conf && sysctl -p && echo "net.ipv4.tcp_low_latency_tcp = 1" > /proc/sys/net/ipv4/tcp_low_