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czy880816 · Dec 14, 2018 · 71481c5 · 71481c5
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diff --git a/docs/e-commerce-website-detail-page-architecture.md b/docs/e-commerce-website-detail-page-architecture.md
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+## 电商网站的商品详情页系统架构
+
+### 小型电商网站的商品详情页系统架构
+小型电商网站的页面展示采用页面全量静态化的思想。数据库中存放了所有的商品信息，页面静态化系统，将数据填充进静态模板中，形成静态化页面，推入 Nginx 服务器。用户浏览网站页面时，取用一个已经静态化好的 html 页面，直接返回回去，不涉及任何的业务逻辑处理。
+
+![e-commerce-website-detail-page-architecture-1](/docs/img/e-commerce-website-detail-page-architecture-1.png)
+
+- 好处：用户每次浏览一个页面，不需要进行任何的跟数据库的交互逻辑，也不需要执行任何的代码，直接返回一个 html 页面就可以了，速度和性能非常高。
+- 坏处：仅仅适用于一些小型的网站，比如页面的规模在几十到几万不等。对于一些大型的电商网站，亿级数量的页面，你说你每次页面模板修改了，都需要将这么多页面全量静态化，靠谱吗？
+
+### 大型电商网站的商品详情页系统架构
+大型电商网站商品详情页的系统设计中，当商品信息发生变更时，会将变更消息压入消息队列中。**缓存服务**从消息队列中消费此消息时，发现有信息发生变更，便通过调用接口，获取变更后的数据。将整合好的数据推送至 redis 中。Nginx 获取到最新的缓存数据，并且缓存到 Nginx 自己本地中。
+
+用户浏览网页时，动态将 Nginx 本地数据渲染到本地 html 模板并返回给用户。
+
+![e-commerce-website-detail-page-architecture-2](/docs/img/e-commerce-website-detail-page-architecture-2.png)
+
+
+虽然没有直接返回 html 页面那么快，但是因为数据在本地缓存，所以也很快，其实耗费的也就是动态渲染一个 html 页面的性能。如果 html 模板发生了变更，不需要将所有的页面重新静态化，直接将数据渲染进最新的 html 页面模板后响应即可。
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