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<p>其实就是将数据库分为了主从库，一个主库用于写数据，多个从库完成读数据的操作，主从库之间通过某种机制进行数据的同步，是一种常见的数据库架构。</p>
<img src="/img/readwrite.png" style="height:300px">
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92811-解决了什么问题">9.28.1.1 解决了什么问题<a href="#92811-解决了什么问题" class="hash-link" aria-label="Direct link to 9.28.1.1 解决了什么问题" title="Direct link to 9.28.1.1 解决了什么问题">​</a></h3>
<p>大多数互联网业务，往往读多写少，这时候，数据库的读会首先成为数据库的瓶颈，这时，如果我们希望能够线性的提升数据库的读性能，消除读写锁冲突从而提升数据库的写性能，那么就可以使用“分组架构”（读写分离架构）。</p>
<p>用一句话概括，读写分离是用来解决数据库的读性能瓶颈的。</p>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92812-注意事项">9.28.1.2 注意事项<a href="#92812-注意事项" class="hash-link" aria-label="Direct link to 9.28.1.2 注意事项" title="Direct link to 9.28.1.2 注意事项">​</a></h3>
<ul>
<li>数据库连接池要进行区分，哪些是读连接池，哪个是写连接池，研发的难度会增加；</li>
<li>为了保证高可用，读连接池要能够实现故障自动转移；</li>
<li>主从的一致性问题需要考虑。</li>
</ul>
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="9282-如何实现">9.28.2 如何实现<a href="#9282-如何实现" class="hash-link" aria-label="Direct link to 9.28.2 如何实现" title="Direct link to 9.28.2 如何实现">​</a></h2>
<p><code>Furion</code> 在数据库模块设计之初，就考虑了读写分离这种情况，所以从底层就支持动态切换数据库上下文及读写操作方法约束。</p>
<p>读写分离操作主要使用 <code>IMSRepository</code> 仓储，该仓储已经为开发者提供方便的操作调用。当然也可以不使用该仓储。</p>
<p>下面就给大家演示如何读写多库读写操作。</p>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92821-创建-主库-数据库上下文">9.28.2.1 创建 <code>主库</code> 数据库上下文<a href="#92821-创建-主库-数据库上下文" class="hash-link" aria-label="Direct link to 92821-创建-主库-数据库上下文" title="Direct link to 92821-创建-主库-数据库上下文">​</a></h3>
<div class="language-cs codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-cs codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv codeBlockLinesWithNumbering_o6Pm"><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">DatabaseAccessor</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Microsoft</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">EntityFrameworkCore</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain" style="display:inline-block"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">namespace</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">EntityFramework</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Core</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic">/// &lt;summary&gt;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic">/// 主库数据库上下文</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic">/// &lt;/summary&gt;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">[</span><sp
<p><strong>数据库连接字符串：</strong></p>
<div class="language-json codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-json codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv codeBlockLinesWithNumbering_o6Pm"><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain">{</span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> &quot;ConnectionStrings&quot;: {</span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> &quot;MasterConnectionString&quot;: &quot;Server=localhost;Database=Furion;User=sa;Password=000000;MultipleActiveResultSets=True;&quot;</span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> }</span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain">}</span></span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92822-创建-从库-数据库上下文">9.28.2.2 创建 <code>从库</code> 数据库上下文<a href="#92822-创建-从库-数据库上下文" class="hash-link" aria-label="Direct link to 92822-创建-从库-数据库上下文" title="Direct link to 92822-创建-从库-数据库上下文">​</a></h3>
<div class="language-cs codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-cs codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv codeBlockLinesWithNumbering_o6Pm"><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Core</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">DatabaseAccessor</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Microsoft</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">EntityFrameworkCore</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain" style="display:inline-block"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">namespace</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">EntityFramework</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Core</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic">/// &lt;summary&gt;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic">/// 从库数据库上下文</span><span
<div class="theme-admonition theme-admonition-important admonition_xJq3 alert alert--info"><div class="admonitionHeading_Gvgb"><span class="admonitionIcon_Rf37"><svg viewBox="0 0 14 16"><path fill-rule="evenodd" d="M7 2.3c3.14 0 5.7 2.56 5.7 5.7s-2.56 5.7-5.7 5.7A5.71 5.71 0 0 1 1.3 8c0-3.14 2.56-5.7 5.7-5.7zM7 1C3.14 1 0 4.14 0 8s3.14 7 7 7 7-3.14 7-7-3.14-7-7-7zm1 3H6v5h2V4zm0 6H6v2h2v-2z"></path></svg></span>特别注意</div><div class="admonitionContent_BuS1"><p>多数据库操作除了默认数据库无需自定义 <strong>数据库上下文定位器</strong>，其他数据库都需要有数据库上下文定位器。如 <code>SlaveDbContextLocator</code></p></div></div>
<p><strong>从库数据库上下文定位器：</strong></p>
<div class="language-cs codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-cs codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv codeBlockLinesWithNumbering_o6Pm"><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">DatabaseAccessor</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain" style="display:inline-block"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">namespace</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Core</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic">/// &lt;summary&gt;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic">/// 从库数据库上下文定位器</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic">/// &lt;/summary&gt;</span><span class="token plain"></span></span><br></span><span class="token-line theme-code-block-highlighted-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">public</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">class</span><span class="token plain"> </span><span class="token class-name" style="color:rgb(255, 203, 107)">SlaveDbContextLocator</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token type-list class-name" style="color:rgb(255, 203, 107)">IDbContextLocator</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="tok
<p><strong>数据库连接字符串：</strong></p>
<div class="language-json codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-json codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv codeBlockLinesWithNumbering_o6Pm"><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain">{</span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> &quot;ConnectionStrings&quot;: {</span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> &quot;SlaveConnectionString&quot;: &quot;Server=localhost;Database=FurSlave;User=sa;Password=000000;MultipleActiveResultSets=True;&quot;</span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> }</span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain">}</span></span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92823-注册-主从库-数据库上下文">9.28.2.3 注册 <code>主从库</code> 数据库上下文<a href="#92823-注册-主从库-数据库上下文" class="hash-link" aria-label="Direct link to 92823-注册-主从库-数据库上下文" title="Direct link to 92823-注册-主从库-数据库上下文">​</a></h3>
<div class="language-cs codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-cs codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv codeBlockLinesWithNumbering_o6Pm"><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Core</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Microsoft</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Extensions</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">DependencyInjection</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain" style="display:inline-block"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">namespace</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">EntityFramework</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Core</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">[</span><span class="token attribute class-name" style="color:rgb(255, 203, 107)">AppStartup</span><span class="token attribute attribute-arguments punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token attribute attribute-arguments number" style="color:rgb(247, 140, 108)">600</span><span class="token attribute attribute-arguments punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token punctuation" style="color:rgb(199, 146, 234)">]</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">public</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">se
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92824-创建-person-实体">9.28.2.4 创建 <code>Person</code> 实体<a href="#92824-创建-person-实体" class="hash-link" aria-label="Direct link to 92824-创建-person-实体" title="Direct link to 92824-创建-person-实体">​</a></h3>
<p>由于 <code>主从库</code> 具有相同的数据库结构，所以实体也必须声明 <code>主从库</code>：</p>
<div class="language-cs codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-cs codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv codeBlockLinesWithNumbering_o6Pm"><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">DatabaseAccessor</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">System</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">ComponentModel</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">DataAnnotations</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">System</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">ComponentModel</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">DataAnnotations</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Schema</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain" style="display:inline-block"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">namespace</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Core</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span></span><br></span><span class="token-line theme-code-block-highlighted-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">public</span><span class="token
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92825-将-person-转换成数据库表">9.28.2.5 将 <code>Person</code> 转换成数据库表<a href="#92825-将-person-转换成数据库表" class="hash-link" aria-label="Direct link to 92825-将-person-转换成数据库表" title="Direct link to 92825-将-person-转换成数据库表">​</a></h3>
<p><strong>创建主库数据库表：</strong></p>
<div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv codeBlockLinesWithNumbering_o6Pm"><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain">Add-Migration v0.0.1 -Context MasterDbContext</span></span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div>
<div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv codeBlockLinesWithNumbering_o6Pm"><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain">Update-Database -Context MasterDbContext</span></span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div>
<p><strong>创建从库数据库表：</strong></p>
<div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv codeBlockLinesWithNumbering_o6Pm"><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain">Add-Migration v0.0.1 -Context SlaveDbContext</span></span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div>
<div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv codeBlockLinesWithNumbering_o6Pm"><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain">Update-Database -Context SlaveDbContext</span></span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div>
<img src="/img/readwrite1.png">
<img src="/img/readwrite2.png">
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92826-固定主从库使用例子">9.28.2.6 固定主从库使用例子<a href="#92826-固定主从库使用例子" class="hash-link" aria-label="Direct link to 9.28.2.6 固定主从库使用例子" title="Direct link to 9.28.2.6 固定主从库使用例子">​</a></h3>
<div class="language-cs codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-cs codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv codeBlockLinesWithNumbering_o6Pm"><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Core</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">DatabaseAccessor</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">DynamicApiController</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">System</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Collections</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Generic</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain" style="display:inline-block"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">namespace</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Application</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span></span><br
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92827-随机或-自定义返回从库-">9.28.2.7 <code>随机</code>或 <code>自定义</code>返回从库 ✨<a href="#92827-随机或-自定义返回从库-" class="hash-link" aria-label="Direct link to 92827-随机或-自定义返回从库-" title="Direct link to 92827-随机或-自定义返回从库-">​</a></h3>
<p>在 <code>Furion 2.4.1 + </code> 版本新增了 <code>IMSRepository</code> 和 <code>IMSRepository&lt;TMasterDbContextLocator&gt;</code> 仓储类型，可以获取随机仓储或自定义仓储。使用例子如下：</p>
<ul>
<li>配置 主库 <code>[AppDbContext]</code> 特性的 <code>SlaveDbContextLocators</code> 属性，可通过构造函数最后参数传入，如：</li>
</ul>
<div class="language-cs codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-cs codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv codeBlockLinesWithNumbering_o6Pm"><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">DatabaseAccessor</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Microsoft</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">EntityFrameworkCore</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain" style="display:inline-block"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">namespace</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">EntityFramework</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Core</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span></span><br></span><span class="token-line theme-code-block-highlighted-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">[</span><span class="token attribute class-name" style="color:rgb(255, 203, 107)">AppDbContext</span><span class="token attribute attribute-arguments punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token attribute attribute-arguments string" style="color:rgb(195, 232, 141)">&quot;Sqlite3ConnectionString&quot;</span><span class="token attribute attribute-arguments punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token attribute attribute-arguments"> DbProvider</span><span class="token attribute attribute-arguments punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token attribute attribute-arguments">Sqlite</span><span class="token attribute attribute-arguments punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token attribute attribute-arguments"> </span><span class="token attribute attribute-arguments keyword" style="font-style:italic">typeof</span><span class="token attribute attribute-argumen
<ul>
<li>使用 <code>IMSRepository</code> 或 <code>IMSRepository&lt;TMasterDbContextLocator&gt;</code></li>
</ul>
<div class="language-cs codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-cs codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv codeBlockLinesWithNumbering_o6Pm"><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Core</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">DatabaseAccessor</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">DynamicApiController</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">using</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">System</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Collections</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Generic</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain" style="display:inline-block"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token keyword" style="font-style:italic">namespace</span><span class="token plain"> </span><span class="token namespace" style="color:rgb(178, 204, 214)">Furion</span><span class="token namespace punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token namespace" style="color:rgb(178, 204, 214)">Application</span><span class="token plain"></span></span><br></span><span class="token-line codeLine_lJS_" style="color:#bfc7d5"><span class="codeLineNumber_Tfdd"></span><span class="codeLineContent_feaV"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span></span><br
<div class="theme-admonition theme-admonition-note admonition_xJq3 alert alert--secondary"><div class="admonitionHeading_Gvgb"><span class="admonitionIcon_Rf37"><svg viewBox="0 0 14 16"><path fill-rule="evenodd" d="M6.3 5.69a.942.942 0 0 1-.28-.7c0-.28.09-.52.28-.7.19-.18.42-.28.7-.28.28 0 .52.09.7.28.18.19.28.42.28.7 0 .28-.09.52-.28.7a1 1 0 0 1-.7.3c-.28 0-.52-.11-.7-.3zM8 7.99c-.02-.25-.11-.48-.31-.69-.2-.19-.42-.3-.69-.31H6c-.27.02-.48.13-.69.31-.2.2-.3.44-.31.69h1v3c.02.27.11.5.31.69.2.2.42.31.69.31h1c.27 0 .48-.11.69-.31.2-.19.3-.42.31-.69H8V7.98v.01zM7 2.3c-3.14 0-5.7 2.54-5.7 5.68 0 3.14 2.56 5.7 5.7 5.7s5.7-2.55 5.7-5.7c0-3.15-2.56-5.69-5.7-5.69v.01zM7 .98c3.86 0 7 3.14 7 7s-3.14 7-7 7-7-3.12-7-7 3.14-7 7-7z"></path></svg></span>特别说明</div><div class="admonitionContent_BuS1"><p><code>IMSRepository</code> 不带泛型默认指的是 <code>IMSRepository&lt;TMasterDbContextLocator&gt;</code>，如需泛型版本，则使用 <code>IMSRepository&lt;定位器&gt;</code></p></div></div>
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="9283-主从复制">9.28.3 主从复制<a href="#9283-主从复制" class="hash-link" aria-label="Direct link to 9.28.3 主从复制" title="Direct link to 9.28.3 主从复制">​</a></h2>
<p>主从复制：是一种数据备份的方案。</p>
<p>简单来说，是使用两个或两个以上相同的数据库，将一个数据库当做主数据库，而另一个数据库当做从数据库。<strong>在主数据库中进行相应操作时，从数据库记录下所有主数据库的操作，使其二者一模一样。</strong></p>
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="9284-主从复制几种方式">9.28.4 主从复制几种方式<a href="#9284-主从复制几种方式" class="hash-link" aria-label="Direct link to 9.28.4 主从复制几种方式" title="Direct link to 9.28.4 主从复制几种方式">​</a></h2>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92841-同步复制">9.28.4.1 同步复制<a href="#92841-同步复制" class="hash-link" aria-label="Direct link to 9.28.4.1 同步复制" title="Direct link to 9.28.4.1 同步复制">​</a></h3>
<p>所谓的同步复制，意思是 <code>Master</code> 的变化，必须等待 <code>Slave-1，Slave-2，...，Slave-n</code> 完成后才能返回。
这样，显然不可取，比如，在 <code>Web</code> 前端页面上，用户增加了条记录，需要等待很长时间。</p>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92842-异步复制">9.28.4.2 异步复制<a href="#92842-异步复制" class="hash-link" aria-label="Direct link to 9.28.4.2 异步复制" title="Direct link to 9.28.4.2 异步复制">​</a></h3>
<p>如同 AJAX 请求一样。<code>Master</code> 只需要完成自己的数据库操作即可。至于 <code>Slaves</code> 是否收到二进制日志，是否完成操作，不用关心。<strong>（推荐方式）</strong></p>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92843-半同步复制">9.28.4.3 半同步复制<a href="#92843-半同步复制" class="hash-link" aria-label="Direct link to 9.28.4.3 半同步复制" title="Direct link to 9.28.4.3 半同步复制">​</a></h3>
<p><code>Master</code> 只保证 <code>Slaves</code> 中的一个操作成功，就返回，其他 <code>Slave</code> 不管。</p>
<p>下面将使用 <code>SqlServer</code> 简单配置主从复制功能。</p>
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="9285-sqlserver-主库配置">9.28.5 <code>SqlServer</code> 主库配置<a href="#9285-sqlserver-主库配置" class="hash-link" aria-label="Direct link to 9285-sqlserver-主库配置" title="Direct link to 9285-sqlserver-主库配置">​</a></h2>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92851-添加-本地发布">9.28.5.1 添加 <code>本地发布</code><a href="#92851-添加-本地发布" class="hash-link" aria-label="Direct link to 92851-添加-本地发布" title="Direct link to 92851-添加-本地发布">​</a></h3>
<img src="/img/dbcopy1.png">
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92852-选择-分发服务器">9.28.5.2 选择 <code>分发服务器</code><a href="#92852-选择-分发服务器" class="hash-link" aria-label="Direct link to 92852-选择-分发服务器" title="Direct link to 92852-选择-分发服务器">​</a></h3>
<img src="/img/dbcopy2.png">
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92853-启用-代理">9.28.5.3 启用 <code>代理</code><a href="#92853-启用-代理" class="hash-link" aria-label="Direct link to 92853-启用-代理" title="Direct link to 92853-启用-代理">​</a></h3>
<img src="/img/dbcopy3.png">
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92854-发布数据库">9.28.5.4 发布数据库<a href="#92854-发布数据库" class="hash-link" aria-label="Direct link to 9.28.5.4 发布数据库" title="Direct link to 9.28.5.4 发布数据库">​</a></h3>
<img src="/img/dbcopy4.png">
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92855-快照发布">9.28.5.5 快照发布<a href="#92855-快照发布" class="hash-link" aria-label="Direct link to 9.28.5.5 快照发布" title="Direct link to 9.28.5.5 快照发布">​</a></h3>
<img src="/img/dbcopy5.png">
<p>具体选择何种发布类型，视具体业务场景而定。</p>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92856-选择发布项目">9.28.5.6 选择发布项目<a href="#92856-选择发布项目" class="hash-link" aria-label="Direct link to 9.28.5.6 选择发布项目" title="Direct link to 9.28.5.6 选择发布项目">​</a></h3>
<img src="/img/dbcopy6.png">
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92857-配置分发计划">9.28.5.7 配置分发计划<a href="#92857-配置分发计划" class="hash-link" aria-label="Direct link to 9.28.5.7 配置分发计划" title="Direct link to 9.28.5.7 配置分发计划">​</a></h3>
<img src="/img/dbcopy7.png">
<img src="/img/dbcopy8.png">
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92858-配置安全设置">9.28.5.8 配置安全设置<a href="#92858-配置安全设置" class="hash-link" aria-label="Direct link to 9.28.5.8 配置安全设置" title="Direct link to 9.28.5.8 配置安全设置">​</a></h3>
<img src="/img/dbcopy9.png">
<img src="/img/dbcopy10.png">
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92859-完成配置">9.28.5.9 完成配置<a href="#92859-完成配置" class="hash-link" aria-label="Direct link to 9.28.5.9 完成配置" title="Direct link to 9.28.5.9 完成配置">​</a></h3>
<img src="/img/dbcopy11.png">
<img src="/img/dbcopy12.png">
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="9286-sqlserver-从库配置">9.28.6 <code>SqlServer</code> 从库配置<a href="#9286-sqlserver-从库配置" class="hash-link" aria-label="Direct link to 9286-sqlserver-从库配置" title="Direct link to 9286-sqlserver-从库配置">​</a></h2>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92861-添加-本地订阅">9.28.6.1 添加 <code>本地订阅</code><a href="#92861-添加-本地订阅" class="hash-link" aria-label="Direct link to 92861-添加-本地订阅" title="Direct link to 92861-添加-本地订阅">​</a></h3>
<img src="/img/dbrece1.png">
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92862-选择-分发服务器">9.28.6.2 选择 <code>分发服务器</code><a href="#92862-选择-分发服务器" class="hash-link" aria-label="Direct link to 92862-选择-分发服务器" title="Direct link to 92862-选择-分发服务器">​</a></h3>
<img src="/img/dbrece2.png">
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92863-选择-分发代理位置">9.28.6.3 选择 <code>分发代理位置</code><a href="#92863-选择-分发代理位置" class="hash-link" aria-label="Direct link to 92863-选择-分发代理位置" title="Direct link to 92863-选择-分发代理位置">​</a></h3>
<img src="/img/dbrece3.png">
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92864-选择-订阅数据库">9.28.6.4 选择 <code>订阅数据库</code><a href="#92864-选择-订阅数据库" class="hash-link" aria-label="Direct link to 92864-选择-订阅数据库" title="Direct link to 92864-选择-订阅数据库">​</a></h3>
<img src="/img/dbrece4.png">
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92865-选择-分发安全设置">9.28.6.5 选择 <code>分发安全设置</code><a href="#92865-选择-分发安全设置" class="hash-link" aria-label="Direct link to 92865-选择-分发安全设置" title="Direct link to 92865-选择-分发安全设置">​</a></h3>
<img src="/img/dbrece5.png">
<img src="/img/dbrece6.png">
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92866-选择-同步计划">9.28.6.6 选择 <code>同步计划</code><a href="#92866-选择-同步计划" class="hash-link" aria-label="Direct link to 92866-选择-同步计划" title="Direct link to 92866-选择-同步计划">​</a></h3>
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<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="92867-完成订阅">9.28.6.7 完成订阅<a href="#92867-完成订阅" class="hash-link" aria-label="Direct link to 9.28.6.7 完成订阅" title="Direct link to 9.28.6.7 完成订阅">​</a></h3>
<img src="/img/dbrece8.png">
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="9287-分发定义监视">9.28.7 分发定义监视<a href="#9287-分发定义监视" class="hash-link" aria-label="Direct link to 9.28.7 分发定义监视" title="Direct link to 9.28.7 分发定义监视">​</a></h2>
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<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="9288-查看主从复制结果">9.28.8 查看主从复制结果<a href="#9288-查看主从复制结果" class="hash-link" aria-label="Direct link to 9.28.8 查看主从复制结果" title="Direct link to 9.28.8 查看主从复制结果">​</a></h2>
<img src="/img/dbrece10.png">
<img src="/img/dbrece11.png">
<div class="theme-admonition theme-admonition-important admonition_xJq3 alert alert--info"><div class="admonitionHeading_Gvgb"><span class="admonitionIcon_Rf37"><svg viewBox="0 0 14 16"><path fill-rule="evenodd" d="M7 2.3c3.14 0 5.7 2.56 5.7 5.7s-2.56 5.7-5.7 5.7A5.71 5.71 0 0 1 1.3 8c0-3.14 2.56-5.7 5.7-5.7zM7 1C3.14 1 0 4.14 0 8s3.14 7 7 7 7-3.14 7-7-3.14-7-7-7zm1 3H6v5h2V4zm0 6H6v2h2v-2z"></path></svg></span>特别特性</div><div class="admonitionContent_BuS1"><p>主从复制有一定迟延性，所以系统设计要有一定“容忍性&quot;。</p></div></div>
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="9289-反馈与建议">9.28.9 反馈与建议<a href="#9289-反馈与建议" class="hash-link" aria-label="Direct link to 9.28.9 反馈与建议" title="Direct link to 9.28.9 反馈与建议">​</a></h2>
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