Ubuntu 18.04/18.10安装BBR加速
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<p>
Google BBR 是一款免费开源的TCP拥塞控制传输控制协议, 可以使 Linux 服务器显著提高吞吐量和减少 TCP 连接的延迟。 项目地址:https://github.com/google/bbr</p>
<h3>
<strong>Ubuntu开启BBR</strong>
</h3>
<p>
</p>
<p>
<strong>Step 1：修改系统变量</strong></p>
<pre class="wp-block-code prettyprint">
<code class="hljs ruby"><span class="pln"><span class="pln">echo </span></span><span class="str"><span class="str"><span class="hljs-string">"net.core.default_qdisc=fq"</span></span></span><span class="pln"> </span><span class="pun"><span class="pun"><span class="hljs-meta">>></span></span></span><span class="pln"><span class="hljs-meta"> </span></span><span class="str"><span class="str">/etc/</span></span><span class="pln"><span class="pln">sysctl</span></span><span class="pun"><span class="pun">.</span></span><span class="pln"><span class="pln">conf
echo </span></span><span class="str"><span class="str"><span class="hljs-string">"net.ipv4.tcp_congestion_control=bbr"</span></span></span><span class="pln"> </span><span class="pun"><span class="pun"><span class="hljs-meta">>></span></span></span><span class="pln"><span class="hljs-meta"> </span></span><span class="str"><span class="str">/etc/</span></span><span class="pln"><span class="pln">sysctl</span></span><span class="pun"><span class="pun">.</span></span><span class="pln"><span class="pln">conf</span></span></code></pre>
<p>
<strong>Step 2:保存生效</strong></p>
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<code class="hljs nginx"><span class="pln"><span class="pln"><span class="hljs-attribute">sysctl</span> </span></span><span class="pun"><span class="pun">-</span></span><span class="pln"><span class="pln">p</span></span></code></pre>
<p>
<strong>Step 3：检查BBR是否开启</strong></p>
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<code class="hljs css"><span class="pln"><span class="pln"><span class="hljs-selector-tag">sysctl</span> <span class="hljs-selector-tag">net</span></span></span><span class="pun"><span class="pun"><span class="hljs-selector-class">.</span></span></span><span class="pln"><span class="pln"><span class="hljs-selector-class">ipv4</span></span></span><span class="pun"><span class="pun"><span class="hljs-selector-class">.</span></span></span><span class="pln"><span class="pln"><span class="hljs-selector-class">tcp_available_congestion_control</span></span></span></code></pre>
<p>
如果 <code>返回</code></p>
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<code class="hljs"><span class="pln"><span class="pln">net</span></span><span class="pun"><span class="pun">.</span></span><span class="pln"><span class="pln">ipv4</span></span><span class="pun"><span class="pun">.</span></span><span class="pln"><span class="pln">tcp_available_congestion_control </span></span><span class="pun"><span class="pun">=</span></span><span class="pln"><span class="pln"> bbr cubic reno</span></span></code></pre>
<p>
则开启成功！</p>
<p>
<strong>Step 4：检查BBR是否启动成功</strong></p>
<pre class="wp-block-code prettyprint">
<code class="hljs perl"><span class="pln"><span class="pln">lsmod </span></span><span class="pun"><span class="pun">|</span></span><span class="pln"><span class="pln"> <span class="hljs-keyword">grep</span> bbr</span></span></code></pre>
<p>
如果返回</p>
<pre class="wp-block-code prettyprint">
<code class="hljs nginx"><span class="pln"><span class="pln"><span class="hljs-attribute">tcp_bbr</span> </span></span><span class="lit"><span class="lit"><span class="hljs-number">20480</span></span></span><span class="pln"></span><span class="lit"><span class="lit"><span class="hljs-number">14</span></span></span></code></pre>
<p>
则启动 成功</p>
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