传统的数据挖掘算法是在数据库的一张单一的表中查找模式。

Typical data mining approaches look for patterns in a single relation of a database.

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要确定它是否是 tar 文件，将在文件末尾查找模式 ".tar"。

To determine if it is a tarball, it will look for the pattern ".tar" at the end of the file. Here it is

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“如果没有分析一些历史数据就来查找模式，很难了解到底要在数据流中查找什么，”Deutsch说。

"It's hard to know what to look for in a stream of data if you haven't already analyzed some historical data to look for patterns," says Deutsch.

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