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专栏/Dubbo源码解读与实战-完/38 集群容错：一个好汉三个帮（下）.md.html
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@@ -722,10 +722,10 @@ private void rePut(Timeout timeout) {
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</code></pre>
<p>在 Dubbo 中使用多个注册中心的架构如下图所示：</p>
<p><img src="assets/Ciqc1F_IvtuAXngKAADJgn-frEE576.png" alt="Lark20201203-183149.png" /></p>
<p><img src="assets/Ciqc1F_IvtuAXngKAADJgn-frEE576.png" alt="png" /></p>
<p>双注册中心结构图</p>
<p>Consumer 可以使用 ZoneAwareClusterInvoker 先在多个注册中心之间进行选择，选定注册中心之后，再选择 Provider 节点，如下图所示：</p>
<p><img src="assets/Ciqc1F_IvuOAFBfoAAD_GvyhrZY880.png" alt="Lark20201203-183145.png" /></p>
<p><img src="assets/Ciqc1F_IvuOAFBfoAAD_GvyhrZY880.png" alt="png" /></p>
<p>ZoneAwareClusterInvoker 在多注册中心之间进行选择的策略有以下四种。</p>
<ol>
<li>找到<strong>preferred 属性为 true 的注册中心，它是优先级最高的注册中心</strong>，只有该中心无可用 Provider 节点时，才会回落到其他注册中心。</li>