Data layer - File system | Database | Caching system.

数据层—文件系统|数据库|缓冲系统。

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Download memcached: a distributed memory caching system.

下载memcached：一种分布式内存缓存系统。

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Memcached is a high-performance, distributed memory object caching system.

memcached是一个高性能、分布式的内存对象缓存系统。

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Apple will apparently be using a caching system that they've patented to take advantage of broadband connections for maximizing video quality and smoothness, and will supposedly allow direct-to-iPod transfers through the service.

ENGADGET: Apple may offer streaming video "downloads"

Others at the edge of the Web aim to improve the existing system by using caching technology from Akamai and others.

FORBES: Weaving The Perfect Net

Chaitanya Kanojia, Aereo's chief executive, said Aereo's smooth play is due in part to the company building its own transcoding system, and there's no buffering or caching of content.

WSJ: For Live TV on the Go, Aereo Is Impressive But Limited