驱动器上的缓存容量、所使用的硬盘算法、接口速度和磁录密度组合到一起，就构成了磁盘传输时间。

When combined, the cache capacity on the drive, the disk algorithms used, the interface speed, and the areal density, produce a disk transfer time.

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后一个是分布式缓存器，当存储空间的容量用光的时候，就需要一种可扩展的机制来存储这些数据。

The latter is a distributed cache since this is where the bulk of storage space is used up, and a scalable mechanism is needed to store the data.

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即使动态生成大量页面，这些页面也至少可以在几秒钟内缓存下来，同时节省服务器的容量。

Even if you generate the bulk of your pages dynamically, those pages can likely be cached for a few seconds at least, sparing your server in the meantime.

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