This tip starts with a simple description of the problem: defining a composite database key.

本技巧从问题的简单的描述开始：定义组合数据库键。

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This is a key, similar to a database key structure that identifies a particular cache entry as unique.

这是一个键值，如同数据库里的键结构，唯一地标识每一个高速缓存条目。

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This identifier, most often a database key, can be generated and sent to the client as one of the URL parameters.

这个标识符(通常是数据库键)能够作为该url参数之一而生成并发送到客户机。

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"Schooner's MySQL and NoSQL solutions combined with the LSI WarpDrive card provide industry-leading performance for database and key-value stores, delivering over 9x performance throughput increase relative to hard drive configurations and over 3x performance throughput increase relative to alternative PCIe flash-based solutions, " said Dr. John Busch, founder and CTO, Schooner Information Technologies.

ENGADGET: LSI's WarpDrive SSD is a steal at $11,500

Schering-Plough has changed the start date listed in a government database for the key clinical trial testing the now-controversial cholesterol pill Vytorin, which Schering shares with Merck .

FORBES: Schering-Plough Backdates Trial

Dangdang's husband-and-wife team soon realised, for example, that one of Amazon's key assets was a huge, searchable database of titles.

ECONOMIST: Selling books in China