阿里云CDN（内容分发网络）是阿里巴巴集团推出的一款全球领先的CDN服务，它能够快速提升网站或应用的访问速度，降低网络延迟，提高用户体验。在选择阿里云CDN时，我们需要考虑如何计算费用，以及如何选择合适的数据库类型。本文将详细介绍阿里云CDN的费用计算方法，并提供一些数据库类型的选择建议。
阿里云CDN的费用计算方法有多种，其中最常见的是按流量计费和按带宽计费。下面我们将分别介绍这两种计费方式的详细计算方法。
按流量计费
按流量计费是指根据用户通过CDN访问的内容流量来计算费用。具体计算公式如下：
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