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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width">
<meta name="theme-color" content="#222" media="(prefers-color-scheme: light)">
<meta name="theme-color" content="#222" media="(prefers-color-scheme: dark)"><meta name="generator" content="Hexo 6.3.0">
<link rel="stylesheet" href="/css/main.css">
<link rel="stylesheet" href="https://fonts.loli.net/css?family=Lato:300,300italic,400,400italic,700,700italic&display=swap&subset=latin,latin-ext">
<link rel="stylesheet" href="https://cdn.bootcdn.net/ajax/libs/font-awesome/5.14.0/css/all.min.css">
<link rel="stylesheet" href="https://cdn.bootcdn.net/ajax/libs/animate.css/3.1.1/animate.min.css">
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<script src="https://unpkg.zhimg.com/[email protected]/pace.min.js" integrity="sha256-gqd7YTjg/BtfqWSwsJOvndl0Bxc8gFImLEkXQT8+qj0=" crossorigin="anonymous"></script>
<script class="next-config" data-name="main" type="application/json">{"hostname":"fengzhao.me","root":"/","images":"/images","scheme":"Pisces","darkmode":true,"version":"8.18.2","exturl":false,"sidebar":{"position":"left","display":"post","padding":18,"offset":12},"copycode":{"enable":false,"style":null},"fold":{"enable":false,"height":500},"bookmark":{"enable":false,"color":"#222","save":"auto"},"mediumzoom":false,"lazyload":false,"pangu":false,"comments":{"style":"tabs","active":null,"storage":true,"lazyload":false,"nav":null},"stickytabs":false,"motion":{"enable":true,"async":false,"transition":{"menu_item":"fadeInDown","post_block":"fadeIn","post_header":"fadeInDown","post_body":"fadeInDown","coll_header":"fadeInLeft","sidebar":"fadeInUp"}},"prism":false,"i18n":{"placeholder":"搜索...","empty":"没有找到任何搜索结果：${query}","hits_time":"找到 ${hits} 个搜索结果（用时 ${time} 毫秒）","hits":"找到 ${hits} 个搜索结果"}}</script><script src="/js/config.js"></script>
<meta property="og:type" content="website">
<meta property="og:title" content="FengZhao's Blog">
<meta property="og:url" content="https://fengzhao.me/index.html">
<meta property="og:site_name" content="FengZhao's Blog">
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<title>FengZhao's Blog</title>
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<h1 class="site-title">FengZhao's Blog</h1>
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<p class="site-subtitle" itemprop="description">「年华易逝 懂得珍惜」</p>
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src="/images/avatar.png">
<p class="site-author-name" itemprop="name">fengzhao</p>
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<div class="site-state-wrap animated">
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<div class="site-state-item site-state-posts">
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<span class="site-state-item-count">7</span>
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</a>
</div>
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</span>
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<a href="mailto:[email protected]" title="E-Mail → mailto:[email protected]" rel="noopener me" target="_blank"><i class="fa fa-envelope fa-fw"></i>E-Mail</a>
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<div class="main-inner index posts-expand">
<div class="post-block">
<article itemscope itemtype="http://schema.org/Article" class="post-content" lang="">
<link itemprop="mainEntityOfPage" href="https://fengzhao.me/2022/08/22/2022-08-22-%E4%B8%80%E4%BA%9B%E7%BB%84%E7%BD%91%E5%B8%B8%E8%AF%86%E5%92%8C%E6%96%B9%E6%B3%95/">
<span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
<meta itemprop="image" content="/images/avatar.png">
<meta itemprop="name" content="fengzhao">
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<span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
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<span hidden itemprop="post" itemscope itemtype="http://schema.org/CreativeWork">
<meta itemprop="name" content="undefined | FengZhao's Blog">
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<header class="post-header">
<h2 class="post-title" itemprop="name headline">
<a href="/2022/08/22/2022-08-22-%E4%B8%80%E4%BA%9B%E7%BB%84%E7%BD%91%E5%B8%B8%E8%AF%86%E5%92%8C%E6%96%B9%E6%B3%95/" class="post-title-link" itemprop="url">一些组网常识和方法</a>
</h2>
<div class="post-meta-container">
<div class="post-meta">
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<span class="post-meta-item-icon">
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<span class="post-meta-item-text">发表于</span>
<time title="创建时间：2022-08-22 11:27:59" itemprop="dateCreated datePublished" datetime="2022-08-22T11:27:59+08:00">2022-08-22</time>
</span>
<span class="post-meta-item">
<span class="post-meta-item-icon">
<i class="far fa-calendar-check"></i>
</span>
<span class="post-meta-item-text">更新于</span>
<time title="修改时间：2023-10-17 11:28:58" itemprop="dateModified" datetime="2023-10-17T11:28:58+08:00">2023-10-17</time>
</span>
</div>
</div>
</header>
<div class="post-body" itemprop="articleBody">
<h1 id="网络常识基础"><a href="#网络常识基础" class="headerlink" title="网络常识基础"></a>网络常识基础</h1><h3 id="网速知识"><a href="#网速知识" class="headerlink" title="网速知识"></a>网速知识</h3><p><strong>下载/上传</strong>：</p>
<p>网络数据传输分为发送数据和接收数据两部分：</p>
<ul>
<li><strong>上传</strong>就是向外部发送数据（上行）</li>
<li><strong>下载</strong>就是从外部接收数据（下行）</li>
</ul>
<p><strong>带宽单位</strong></p>
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<link itemprop="mainEntityOfPage" href="https://fengzhao.me/2022/02/22/2022-02-22-%E7%90%86%E8%A7%A3HTTPS%E4%B8%AD%E7%9A%84htst/">
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<a href="/2022/02/22/2022-02-22-%E7%90%86%E8%A7%A3HTTPS%E4%B8%AD%E7%9A%84htst/" class="post-title-link" itemprop="url">理解HTTPS中的htst</a>
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<span class="post-meta-item-text">发表于</span>
<time title="创建时间：2022-02-22 17:43:46" itemprop="dateCreated datePublished" datetime="2022-02-22T17:43:46+08:00">2022-02-22</time>
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<time title="修改时间：2022-08-22 11:12:26" itemprop="dateModified" datetime="2022-08-22T11:12:26+08:00">2022-08-22</time>
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<h2 id="起因"><a href="#起因" class="headerlink" title="起因"></a>起因</h2><p>有不少网站只通过HTTPS对外提供服务，但用户在访问某个网站的时候，在浏览器里却往往直接输入网站域名（例如 <a href="http://www.example.com/">www.example.com</a> ），甚至都不带www前缀，而不是输入完整的URL（例如 <a href="https://www.example.com/">https://www.example.com</a> ）。不过浏览器依然能正确的使用HTTPS发起请求。这背后多亏了服务器和浏览器的协作。</p>
<p>现代浏览器，地址栏（多功能框）也可以用作搜索框。地址栏会自动使用 Google 进行搜索，但您也可将默认搜索引擎改设为另一搜索引擎。其实当我们在浏览器地址栏开始输入信息时，浏览器就已经开始进行工作了。</p>
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<h1 id="nginx日志处理"><a href="#nginx日志处理" class="headerlink" title="nginx日志处理"></a>nginx日志处理</h1><p>在 nginx 中，主要有 access 日志、error 日志 、 rewrite 日志。前两种由 <code>ngx_http_log_module</code> 模块予以支持，<code>rewrite</code> 日志则由 <code>ngx_http_rewrite_module</code> 模块提供，这两个模块默认都已包含且启用。</p>
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<h3 id="简介"><a href="#简介" class="headerlink" title="简介"></a>简介</h3><p>docker-compose 是一个定义和运行多个 docker 容器实例的工具。它使用一个 docker-compose.yml（yaml格式）来定义一组关联的容器应用为一个项目（porject）。通过一个简单的命令，可以创建启动yml中配置的多个容器。它可以在所有的环境中使用，包括生产，开发，测试，持续集成环境。</p>
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<h2 id="Docker-概述"><a href="#Docker-概述" class="headerlink" title="Docker 概述"></a>Docker 概述</h2><p>Docker是一个开发，运输和运行应用程序的开放平台。 Docker使您可以将应用程序与基础架构分离，以便快速交付软件。使用Docker，您可以像管理应用程序一样管理基础架构。通过利用Docker的方法快速发送，测试和部署代码，您可以显着减少编写代码和在生产中运行代码之间的延迟。</p>
<p>Docker提供了在称为容器的松散隔离环境中打包和运行应用程序的功能。隔离和安全性允许您在给定主机上同时运行多个容器。容器是轻量级的，因为它们不需要管理程序的额外负载，而是直接在主机内核中运行。这意味着您可以在给定硬件组合上运行比使用虚拟机时更多的容器。您甚至可以在实际虚拟机的主机中运行Docker容器！</p>
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<h1 id="MySQL日志文件系统"><a href="#MySQL日志文件系统" class="headerlink" title="MySQL日志文件系统"></a>MySQL日志文件系统</h1><p>日志是mysql数据库的重要组成部分。日志文件中记录着mysql数据库运行期间发生的变化；也就是说用来记录mysql数据库的客户端连接状况、SQL语句的执行情况和错误信息等。当数据库遭到意外的损坏时，可以通过日志查看文件出错的原因，并且可以通过日志文件进行数据恢复。</p>
<h1 id="MySQL日志分类"><a href="#MySQL日志分类" class="headerlink" title="MySQL日志分类"></a>MySQL日志分类</h1><p>MySQL日志大致可以分为一下几种类型：</p>
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<h1 id="数据库事务"><a href="#数据库事务" class="headerlink" title="数据库事务"></a>数据库事务</h1><blockquote>
<p>数据库事务(Database Transaction)，一般是指要做的或所做的事情。在计算机术语中是指访问并可能更新数据库中各种数据项的一个程序执行单元(unit)。</p>
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<p>一个数据库事务通常包含了一个序列的对数据库的读/写操作。它的存在包含有以下两个目的：</p>
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<li>为数据库操作序列提供了一个从失败中恢复到正常状态的方法，同时提供了数据库即使在异常状态下仍能保持一致性的方法。<br>当多个应用程序在并发访问数据库时，可以在这些应用程序之间提供一个隔离方法，以防止彼此的操作互相干扰。</li>
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<li>当事务被提交给了DBMS（数据库管理系统），则DBMS（数据库管理系统）需要确保该事务中的所有操作都成功完成且其结果被永久保存在数据库中，如果事务中有的操作没有成功完成，则事务中的所有操作都需要被回滚，回到事务执行前的状态；同时，该事务对数据库或者其他事务的执行无影响，所有的事务都好像在独立的运行。</li>
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